Publications

Journal Articles

(Under Review) Srivastava, A.K., R. Grotjahn, A.M. Rhoades and P.A. Ullrich (2024) "Large-scale Statistically Meaningful Patterns (LSMPs) associated with precipitation extremes over Northern California" Submitted to J. Geophys. Res. Atm.
(Under Review) Han, Y. and P.A. Ullrich (2024) "The System for Classification of Low-Pressure Systems (SyCLoPS): An All-in-one Objective Framework for Large-scale Datasets" Submitted to J. Geophys. Res. Atm.
(Under Review) Donahue, A.S., P.M. Caldwell, L. Bertagna, H. Beydoun, P.A. Bogenschutz, A.M. Bradley, T.C. Clevenger, J. Foucar, C. Golaz, O. Guba, W. Hannah, B.R. Hillman, J.N. Johnson, N. Keen, W. Lin, B. Singh, M.A. Taylor, J. Tian, C.R. Terai, P.A. Ullrich, X. Yuan and Y. Zhang (2024) "To exascale and beyond -- The Simple Cloud-Resolving E3SM Atmosphere Model (SCREAM), a performance portable global atmosphere model for cloud-resolving scales" Submitted to J. Adv. Model. Earth Sys.
(Under Review) Swenson, L. and P.A. Ullrich (2024) "Clusters of Regional Precipitation Seasonality Change in the Community Earth System Model version 2" Submitted to J. Climate
(Under Review) Rhoades, A.M., C.M. Zarzycki, B.J. Hatchett, H. Inda-Diaz, W. Rudisill, B. Bass, E. Dennis, A. Heggli, R. McCrary, S. McGinnis, M. Ombadi, S. Rahimi-Esfarjani, E. Slinskey, A. Srivastava, J. Szinai, P.A. Ullrich, M. Wehner, D. Yates and A.D. Jones (2024) "Anticipating How Rain-on-Snow Events Will Change through the 21st Century: Lessons from the 1997 New Year’s Flood Event" Submitted to Clim. Dyn.
(Under Review) Negron-Juarez, R., M. Wehner, M. Assunção F. Silva Dias, P.A. Ullrich, J.Q. Chambers and W.J. Riley (2024) "CMIP6 HighResMIP Bias in Extreme Rainfall Drives Underestimation of Amazonian Precipitation" Submitted to Env. Res. Commun.
(Under Review) Srivastava, A.K., M. Wehner, C. Bonfils, P.A. Ullrich and M.A. Risser (2024) "Local hydroclimate drives differential warming rates between regular summer days and extreme hot days in the Northern Hemisphere" Submitted to Weather Clim. Extrem.
(Under Review) Hall, A., S. Rahimi, J. Norris, N. Ban, N. Siler, L.R. Leung, P.A. Ullrich, K.A. Reed and A.F. Prein (2024) "An evaluation of dynamical downscaling methods used to project regional climate change" Submitted to J. Geophys. Res. Atm.
(Under Review) Suhas, D.L., S. Vishnu, S. Goyal, S. Sarkar, P. Mukhopadhyay, P.A. Ullrich and W.R. Boos (2024) "Automated operational forecasting of monsoon low pressure systems" Submitted to Bull. Amer. Meteor. Soc.
(Under Review) Sawadekar, K., Y. Song, M. Pan, H. Beck, R. McCrary, P.A. Ullrich, K. Lawson and C. Shen (2024) "Hydrology-informed interpretable precipitation data fusion with a differentiable hydrologic model" Submitted to Geophys. Res. Lett.
(Under Review | Preprint) Ahn, M.S., P.A. Ullrich, J. Lee, P.J. Gleckler, H.-Y. Ma, C.R. Terai, P.A. Bogenschutz and A.C. Ordonez (2024) "Bimodality in simulated precipitation frequency distributions and its relationship with convective parameterizations" Submitted to npj Clim. Atm. Sci.
(Under Review) Shu, L., Y. Chang, H. Chen, C. Wang, X. Meng, X. Yu, Y. Zhang, C. Duffy, S. Lyu, Z. Li, C. Zhao, Y. Zhang and M. Zhang (2024) "Global Hydrologic Data Cloud: An open, quick and reproducible methodology for watershed modeling" Submitted to Scientific Data
(Under Review) Xue, Z., L.-Y. Leung and P.A. Ullrich (2024) "A greening future elevates flash drought risk" Submitted to Nature Communications
(Under Review) Landy, J., K.A. Reed and P.A. Ullrich (2024) "A climatology of atmospheric fronts and their associated precipitation" Submitted to Geophys. Res. Lett.
(Under Review) Duan, S. and P.A. Ullrich (2024) "Meteorological drivers of North American monsoon extreme precipitation events" Submitted to J. Geophs. Res. Atm.
(Under Review) McClenny, E. and P.A. Ullrich (2024) "Response of atmospheric river width and intensity to sea-surface temperatures in an aquaplanet model" Submitted to J. Geophys. Res. Atm.
(In Press) Lee, J., P. Gleckler, M.-S. Ahn, A. Ordonez, P.A. Ullrich, K.R. Sperber, K.E. Taylor, Y.Y. Planton, E. Guilyardi, P. Durack, C. Bonfils, M.D. Zelinka, L.-W. Chao, B. Dong, C. Doutriaux, C. Zhang, T. Vo, J. Boutte, M.F. Wehner, A.G. Pendergrass, D. Kim, Z. Xue, A.T. Wittenberg and J. Krasting (2024) "Objective Evaluation of Earth System Models: PCMDI Metrics Package (PMP) Version 3" Geosci. Model. Dev., doi: 10.5194/egusphere-2023-2720.
(In Press) Wu, W.-Y., H.-Y. Ma, D.C. Lafferty, Z. Feng, P.A. Ullrich, Q. Tang, J.-C. Golaz, D. Galea and H.-H. Lee (2024) "Assessment of storm-associated precipitation and its extremes using observations and climate model short-range hindcasts" J. Geophys. Res. Atm.
(In Press | Preprint) Pokharel, B., K. Jagannathan, S.Y.S. Wang, A.D. Jones, P.A. Ullrich, L.Y.R. Leung, M. LaPlante, S. Buddhavarapu, K. Borhara, J. Eklund, C. Hasenyager, J, Serago, J.R. Prairie, L. Kaatz, T. Winchell and F. Kugel (2024) "Can we rely on drought-ending "miracles" in the Colorado River Basin?" Submitted to J. Amer. Water Res. Assoc..
(In Press) Willson, J.L., K.A. Reed, C. Jablonowski, J. Kent, P.H. Lauritzen, R. Nair, M.A. Taylor, P.A. Ullrich, C.M. Zarzycki, D.M. Hall, D. Dazlich, R. Heikes, C. Konor, D. Randall, T. Dubos, Y. Meurdesoif, X. Chen, L. Harris, C. Kuhnlein, V. Lee, A. Qaddouri, C. Girard, M. Giorgetta, D. Reinert, H. Miura, T. Ohno and R. Yoshida (2024) "DCMIP2016: The tropical cyclone test case" Submitted to Geosci. Model Dev.
(In Press) Duan, S., P.A. Ullrich, M. Risser and A.M. Rhoades (2024) "Using temporal deep learning models to estimate historical and end-century daily snow water equivalent over the Rocky Mountains" Water Resour. Res.
(In Press) Fasullo, J.T., J.M. Caron, A. Phillips, H. Li, J.H. Richter, R.B. Neale, N. Rosenbloom, G. Strand, S. Glanville, Y. Li, J. Arblaster, F. Lehner, G. Meehl, J.-C. Golaz, P.A. Ullrich and J. Lee (2024) "Modes of variability in E3SM and CESM Large Ensembles" J. Climate, doi: 10.1175/JCLI-D-23-0454.1.
(DOI) Risser, M.D., W.D. Collins, M.F. Wehner, T.A. O'Brien, H. Huang and P.A. Ullrich (2024) "Anthropogenic aerosols mask increases in US rainfall by greenhouse gases" Nature Communications 15, 1318, doi: 10.1038/s41467-024-45504-8.
(DOI) Shu, L., P.A. Ullrich, X. Meng, C. Duffy, H. Chen and Z. Li (2024) "rSHUD v2.0: Advancing SHUD and Unstructured Hydrological Modeling in the R Environment" Geophys. Model Dev. 17 (2), 497-527, doi: 10.5194/gmd-17-497-2024.
(DOI) Harrop, B.E., K. Balaguru, J.-C. Golaz, L.R. Leung, S. Mahajan, A.M. Rhoades, P.A. Ullrich, C. Zhang, X. Zheng, T. Zhou, P.M. Caldwell, N.D. Keen and A. Mametjanov (2023) "Evaluating the water cycle over CONUS using multiple metrics for the Energy Exascale Earth System Model version 1 (E3SMv1) across resolutions" J. Adv. Model. Earth Sys. 15 (11), e2022MS003490, doi: 10.1029/2022MS003156.
(DOI) Sukhdeo, R., R. Grotjahn and P.A. Ullrich (2023) "Two large-scale meteorological patterns are associated with short-duration dry spells in the Northeastern United States" Mon. Weather Rev. 151 (11), 2993-3011, doi: 10.1175/MWR-D-23-0141.1.
(DOI) Rhoades, A.M., C.M. Zarzycki, H.A. Inda-Diaz, M. Ombadi, U. Pasquier, A. Srivastava, B.J. Hatchett, E. Dennis, A. Heggli, R. McCrary, S. McGinnis, S. Rahimi-Esfarjani, E. Slinskey, P.A. Ullrich, M. Wehner and A.D. Jones (2023) "Recreating the California New Year’s flood event of 1997 in a regionally refined Earth system model" J. Adv. Model. Earth Sys. 15 (10), e2023MS003793, doi: 10.1029/2023MS003793.
(DOI) Jones, A.D., D. Rastogi, P. Vahmani, A.M. Stansfield, K.A. Reed, T. Thurber, P.A. Ullrich and J. Rice (2023) "Continental United States climate projections based on thermodynamic modification of historical weather" Sci. Data 10 (664), doi: 10.1038/s41597-023-02485-5.
(DOI) Ahn, M.-S., P.A. Ullrich, P.J. Gleckler, J. Lee, A.C. Ordonez and A.G. Pendergrass (2023) "Evaluating precipitation distributions at regional scales: A benchmarking framework and application to CMIP5 and CMIP6" Geosci. Model Dev. 16 (13), 3927-3951, doi: 10.5194/gmd-16-3927-2023.
(DOI) Vishnu, S., M.D. Risser, T.A. O'Brien, P.A. Ullrich and W.R. Boos (2023) "Observed increase in the peak rain rates of monsoon depressions" npj Clim. Atm. Sci. 6 (111), doi: 10.1038/s41612-023-00436-w.
(DOI) Jagannathan, K., S. Buddhavarapu, P.A. Ullrich, A.D. Jones and the HyperFACETS Team (2023) "Typologies of actionable climate information and its use" Global Env. Change 82, 102732, doi: 10.1016/j.gloenvcha.2023.102732.
(DOI) Srivastava, A.K., P.A. Ullrich, D. Rastogi, P. Vahmani, A. Jones and R. Grotjahn (2023) "Assessment of WRF (v4.2.1) dynamically downscaled precipitation on subdaily and daily timescales over CONUS" Geosci. Model Dev. 16 (13), 3699-3722, doi: 10.5194/gmd-16-3699-2023.
(DOI) Goldenson, N., L.R. Leung, L. Mearns, D. Pierce, K. Reed, P.A. Ullrich, D. Cayan, A. Hall, A. Jones, W. Krantz, S. Rahimi and I. Simpson (2023) "Use-inspired, process-oriented GCM selection: Prioritizing models for regional dynamical downscaling" Bull. Amer. Meteor. Soc. 104 (9), E1619-E1629, doi: 10.1175/BAMS-D-23-0100.1.
(DOI) Molina, M.J., T.A. O'Brien, G. Anderson, M. Ashfaq, K. Bennett, W.D. Collins, K. Dagon, J.M. Restrepo and P.A. Ullrich (2023) "A review of recent and emerging machine learning applications for climate variability and weather phenomena" Art. Intel. for the Earth Syst. 2 (4), doi: 10.1175/AIES-D-22-0086.1.
(DOI) Tang, Q., J.-C. Golaz, L.P. Van Roekel, M.A. Taylor, W. Lin, B.R. Hillman, P.A. Ullrich, A.M. Bradley, O. Guba, J.D. Wolfe, T. Zhou, K. Zhang, X. Zheng, Y. Zhang, M. Zhang, M. Wu, H. Wang, C. Tao, B. Singh, A. Rhoades, Y. Qin, H.-Y. Li, Y. Feng, Y. Zhang, C. Zhang, C.S. Zender, S. Xie, E.L. Roesler, A.F. Roberts, A. Mametjanov, M.E. Maltrud, N.D. Keen, R.L. Jacob, C. Jablonowski, O. Hughes, R.M. Forsyth, P.M. Caldwell, G. Bisht, R.B. McCoy, L.R. Leung and D.C. Bader (2023) "The fully coupled regionally refined model of E3SM version 2: Overview of the atmosphere, land, and river results" Geosci. Model. Dev. 16 (13), 3953-3995, doi: 10.5194/gmd-2022-262.
(DOI) Neelin, J.D., J.P. Krasting, A. Radhakrishnan, J. Liptak, T. Jackson, Y. Ming, W. Dong, A. Gettelman, D.R. Coleman, E.D. Maloney, A.A. Wing, Y. Kuo, F. Ahmed, P.A. Ullrich, C.M. Bitz, R.B. Neale, A. Ordonez and E.A. Maroon (2023) "Process-oriented diagnostics: Principles, practice, community development and common standards" Bull. Amer. Meteor. Soc. 104 (8), E1452-E1468, doi: 10.1175/BAMS-D-21-0268.1.
(DOI) Huang, H., W. Collins, C. Patricola, Y. Ruprich-Robert and P.A. Ullrich (2023) "Contrasting responses of Atlantic and Pacific tropical cyclone activity to Atlantic Multidecadal Variability" Geophys. Res. Lett. 50 (10), e2023GL102959, doi: 10.1029/2023GL102959.
(DOI) Xue, Z. and P.A. Ullrich (2023) "Sensitivity of the pseudo-global warming method under flood conditions: A case study from the Northeastern U.S." Hydro. Earth Syst. Sci. 27 (9), 1909-1927, doi: 10.5194/hess-27-1909-2023.
(DOI) Marsico, D. and P.A. Ullrich (2023) "Strategies for conservative and non-conservative monotone remapping on the sphere" Geosci. Model Dev. 16 (5), 1537–1551, doi: 10.5194/gmd-16-1537-2023.
(DOI) Frame, J., F. Kratzert, H. Gupta, P.A. Ullrich and G. Nearing (2023) "On strictly enforced mass conservation constraints for modeling the rainfall-runoff process" Hydrol. Proc. 37 (3), e14847, doi: 10.1002/hyp.14847.
(DOI) Liu, W., P.A. Ullrich, J. Li, C. Zarzycki, P.M. Caldwell, L.R. Leung and Y. Qian (2023) "The June 2012 North American Derecho: A testbed for evaluating regional and global climate modeling systems at cloud-resolving scales" J. Adv. Model. Earth Sys. 15 (4), e2022MS003358, doi: 10.1029/2022MS003358.
(DOI) Shields, C.A., A.E. Payne, E.J. Shearer, M.F. Wehner, T.A. O'Brien, J.J. Rutz, L.R. Leung, F.M. Ralph, A.B. Marquardt Collow, P.A. Ullrich, Q. Dong, A. Gershunov, H. Griffith, B. Guan, J.M. Lora, M. Lu, E.E. McClenny, K.M. Nardi, M. Pan, Y. Qian, A.M. Ramos, T. Shulgina, M. Viale, C. Sarangi, R. Tomé and C.M. Zarzykci (2023) "Future atmospheric rivers and impacts on precipitation: Overview of the ARTMIP Tier2 high-resolution global warming experiment" Geophs. Res. Lett. 50 (6), e2022GL102091, doi: 10.1029/2022GL102091.
(DOI) Jiang, X., H. Su, S.S. Chen and P.A. Ullrich (2023) "Simulation of African easterly waves in a global climate model" J. Climate 36 (5), doi: 10.1175/JCLI-D-22-0090.1.
(DOI) Zhang, C., J.-C. Golaz, R. Forsyth, T. Vo, S. Xie, Z. Shaheen, G.L. Potter, X.S. Asay-Davis, C.S. Zender, W. Lin, C.-C. Chen, C.R. Terai, S. Mahajan, T. Zhou, K. Balaguru, Q. Tang, C. Tao, Y. Zhang, T. Emmenegger and P.A. Ullrich (2022) "The E3SM Diagnostics Package (E3SM Diags v2.6): A python-based diagnostics package for Earth system models evaluation" Geosci. Model. Dev. 15, 9031–9056, doi: 10.5194/gmd-2022-38.
(DOI) Rhoades, A.M., B.J. Hatchett, M.D. Risser, W.D. Collins, N.E. Bambach, L.S. Huning, R. McCrary, E.R. Siirila-Woodburn, P.A. Ullrich, M.F. Wehner, C.M. Zarzycki and A.D. Jones (2022) "Asymmetric emergence of low-to-no snow in the American Cordillera" Nature Climate Change 12, 1151-1159, doi: 10.1038/s41558-022-01518-y.
(DOI) Mahadevan, V.S., J.E. Guerra, X. Jiao, P. Kuberry, Y. Li, P.A. Ullrich, D. Marsico, R. Jacob, P. Bochev and P. Jones (2022) "Metrics for Intercomparison of Remapping Algorithms (MIRA) applied to Earth System Models" Geosci. Model. Dev. 15, 6601–6635, doi: 10.5194/gmd-15-6601-2022.
(DOI) Bower, E., K.A. Reed, P.A. Ullrich, C.M. Zarzycki and A.G. Pendergrass (2022) "Quantifying heavy precipitation throughout the entire tropical cyclone life cycle" J. Hydrometeor. 23 (10), doi: 10.1175/JHM-D-21-0153.1.
(DOI) Reed, K.A., N. Goldenson, R. Grotjahn, W.J. Gutowski, K. Jagannathan, A.D. Jones, L.R. Leung, S.A. McGinnis, S.C. Pryor, A.K. Srivastava, P.A. Ullrich and C.M. Zarzycki (2022) "Metrics as tools for bridging climate science and applications" WIREs Climate Change 13 (6), doi: 10.1002/wcc.799.
(DOI) Xue, Z. and P.A. Ullrich (2022) "Changing trends in drought patterns over the Northeastern U.S. using multiple large ensemble datasets" J. Climate 35 (22), doi: 10.1175/JCLI-D-21-0810.1.
(DOI) Risser, M., W.D. Collins, M.F. Wehner, T.A. O'Brien, C. Paciorek, J.P. O'Brien, C. Patricola, H. Huang, P.A. Ullrich and B. Loring (2022) "A method for detection and attribution of regional precipitation change using Granger causality: Application to the United States historical record" Climate Dyn., doi: 10.1007/s00382-022-06321-1.
(DOI) Collow, A. B. Marquardt, C. A. Shields, B. Guan, S. Kim, J. M. Lora, E. E. McClenny, K. Nardi, A. Payne, K. Reid, E. J. Shearer, R. Tomé, J. D. Wille, A. M. Ramos, I. V. Gorodetskaya, L. R. Leung, T. A. O'Brien, F. M. Ralph, J. Rutz, P. A. Ullrich and M. Wehner (2022) "An overview of ARTMIP's tier 2 reanalysis intercomparison: Uncertainty in the detection of atmospheric rivers and their associated precipitation" J. Geophys. Res. Atm. 127 (8), e2021JD036155, doi: 10.1029/2021JD036155.
(DOI) Sukhdeo, R., P.A. Ullrich and R. Grotjahn (2022) "Assessing the large-scale drivers of precipitation in the Northeastern United States via Linear Orthogonal Decomposition" Climate Dyn., doi: 10.1007/s00382-022-06289-y.
(DOI) Liu, W., P.A. Ullrich, O. Guba, P.M. Caldwell and N.D. Keen (2022) "An assessment of nonhydrostatic and hydrostatic dynamical cores at seasonal time scales in the Energy Exascale Earth System Model (E3SM)" J. Adv. Model. Earth Sys. 14 (2), e2021MS002805, doi: 10.1029/2021MS002805.
(DOI) O'Brien, T.A., M.F. Wehner, A.E. Payne, C.A. Shields, J.J. Rutz, L.-R. Leung, F.M. Ralph, A. Collow, B. Guan, J. Lora, B. McClenny, K. M. Nardi, A. Ramos, C. Sarangi, E. Shearer, P.A. Ullrich, C. Zarzycki and B. Loring (2022) "Increases in future AR count and size: Overview of the ARTMIP Tier 2 CMIP5/6 experiment" J. Geophys. Res., e2021JD036013, doi: 10.1029/2021JD036013.
(DOI) Bambach, N.E., A.M. Rhoades, B.J. Hatchett, A.D. Jones, P.A. Ullrich and C.M. Zarzycki (2021) "Projecting climate change in the Chilean Andes using variable-resolution CESM" Int. J. Climatology 42 (4), 2514-2542, doi: 10.1002/joc.7379.
(DOI) Caldwell, P.M., C. R. Terai, B. Hillman, N. D. Keen, P. Bogenschutz, W. Lin, H. Beydoun, M. Taylor, L. Bertagna, A. Bradley, T. C. Clevenger, A. S. Donahue, C. Eldred, J. Foucar, C. Golaz, O. Guba, R. Jacob, J. Johnson, J. Krishna, W. Liu, K. Pressel, A. G. Salinger, B. Singh, A. Steyer, P.A. Ullrich, D. Wu, X. Yuan, J. Shpund, H.-Y. Ma and C.S. Zender (2021) "Convection-permitting simulations with the E3SM global atmosphere model" J. Adv. Earth Sys. Model. 13 (11), e2021MS002544, doi: 10.1029/2021MS002544.
(DOI) Srivastava, A., R. Grotjahn, P.A. Ullrich and C. Zarzycki (2021) "Evaluation of precipitation indices in suites of dynamically and statistically downscaled regional climate models over Florida" Climate Dyn., doi: 10.1007/s00382-021-05980-w.
(DOI) Igel, M., P.A. Ullrich and W. Boos (2021) "Upper-tropospheric troughs and North American monsoon rainfall in a long-term track dataset" J. Geophys. Res. Atm. 126 (20), e2021JD034541, doi: 10.1029/2021JD034541.
(DOI) Xue, Z. and P.A. Ullrich (2021) "A comprehensive intermediate-term drought evaluation system and evaluation of climate data products over the Conterminous United States" J. Hydrometeor. 22(9), 2311-2337, doi: 10.1175/JHM-D-20-0314.1.
(DOI) Xue, Z. and P.A. Ullrich (2021) "A retrospective and prospective examination of the 1960s U.S. Northeast Drought" Earth's Future 9 (7), e2020EF001930, doi: 10.1029/2020EF001930.
(DOI) Ullrich, P.A., C.M. Zarzycki, E.E. McClenny, M.C. Pinheiro, A.M. Stansfield and K.A. Reed (2021) "TempestExtremes v2.1: A community framework for feature detection, tracking and analysis in large datasets" Geophys. Model Dev. 14, 5023-5048, doi: 10.5194/gmd-2020-303.
(DOI) Zhou, Y., T.A. O'Brien, P.A. Ullrich, W.D. Collins, C.M. Patricola and A.M. Rhoades (2021) "Uncertainties in atmospheric river life cycles by detection algorithms: Climatology and variability" J. Geophys. Res. Atm. 126 (8), e2020JD033711, doi: 10.1029/2020JD033711.
(DOI) Guerra, J. and P.A. Ullrich (2021) "Spectral steady-state solutions to the 2-D compressible Euler equations for cross mountain flows" Comm. Appl. Math Comp. Sci. 16 (1), 99-117, doi: 10.2140/camcos.2021.16.99.
(DOI) Zarzycki, C.M., P.A. Ullrich and K.A. Reed (2021) "Metrics for evaluating tropical cyclones in climate data" J. Appl. Meteor. Clim. 60 (5), 643-660, doi: 10.1175/JAMC-D-20-0149.1.
(DOI) Wehner, M., J. Lee, M. Risser, P.A. Ullrich, P. Gleckler and W. Collins (2021) "Evaluation of extreme subdaily precipitation in high-resolution global climate model simulations" Phil. Trans. Royal Soc. A 379 (2195), p. 20190545, doi: 10.1098/rsta.2019.0545.
(DOI) Srivastava, A., R. Grotjahn and P.A. Ullrich (2021) "Pooling data improves multimodel IDF estimates over median-based IDF estimates: Analysis over Susquehanna and Florida" J. Hydrometeor. 22 (4), 971-995, doi: 10.1175/JHM-D-20-0180.1.
(DOI) Rhoades, A.M., A.D. Jones, A. Srivastava, H. Huang, T.A. O'Brien, C.M. Patricola, P.A. Ullrich, M. Wehner and Y. Zhou (2020) "The shifting scales of Western US landfalling atmospheric rivers under climate change" Geophys. Res. Lett., 2020GL089096, doi: 10.1029/2020GL089096.
(DOI) McClenny, E., P.A. Ullrich and R. Grotjahn (2020) "Sensitivity of atmospheric river vapor transport and precipitation to uniform sea-surface temperature increases" J. Geophys. Res. Atm. 125 (21), e2020JD033421, doi: 10.1029/2020JD033421.
(DOI) Duan, S., Ullrich, P.A. and Shu, L. (2020) "Using convolutional neural networks for streamflow projection in California" Frontiers in Water, doi: 10.3389/frwa.2020.00028.
(DOI) Balaguru, K., L.-Y. R. Leung, L. van Roekel, J.-C. Golaz, P.A. Ullrich, P. Caldwell, S. Hagos, B. Harrop and A. Mametjanov (2020) "Characterizing tropical cyclones in the Energy Exascale Earth System Model version 1" J. Adv. Model. Earth Sys. 12 (8), e2019MS002024, doi: 10.1029/2019MS002024.
(DOI) Srivastava, A., R. Grotjahn and P.A. Ullrich (2020) "Evaluation of historical CMIP6 model simulations of extreme precipitation over contiguous US regions" Weather Clim. Extr. 29, 100268, doi: 10.1016/j.wace.2020.100268.
(DOI) Nair, V., W. Boos, P.A. Ullrich and T.A. O'Brien (2020) "Assessing historical variability of South Asian monsoon lows and depressions with an optimized tracking algorithm" J. Geophys. Res. Atm. 125 (15), e2020JD032977, doi: 10.1029/2020JD032977.
(DOI) Roberts, M., J. Camp, J. Seddon, P.L. Vidale, K. Hodges, B. Vanniere, J. Mecking, R. Haarsma, A. Bellucci, E. Scoccimarro, L.-P. Caron, F. Chauvin, L. Terray, S. Valcke, M.-P. Moine, D. Putrasahan, C. Roberts, R. Senan, C. Zarzycki, P.A. Ullrich, Y. Yamada, R. Mizuta, C. Kodama, D. Fu, Q. Zhang, G. Danabasoglu, N. Rosenbloom, H. Wang and L. Wu (2020) "Projected Future Changes in Tropical Cyclones using the CMIP6 HighResMIP Multi-model Ensemble" Geophys. Res. Lett. 47 (14), e2020GL088662, doi: 10.1029/2020GL088662.
(DOI) Shu, L., P.A. Ullrich and C.J. Duffy (2020) "Solver for Hydrologic Unstructured Domain (SHUD): Numerical modeling of watershed hydrology with the finite volume method" Geosci. Model. Dev. 13, pp. 2743-2762, doi: 10.5194/gmd-13-2743-2020.
(DOI) Rhoades, A.M., A.D. Jones, T.A. O'Brien, J.P. O'Brien, P.A. Ullrich and C.M. Zarzycki (2020) "Influences of North Pacific Ocean domain extent on the western US winter hydroclimatology in variable-resolution CESM" J. Geophys. Res. Atm. 125 (14), e2019JD031977, doi: 10.1029/2019JD031977.
(DOI) Stansfield, A., K.A. Reed, C.M. Zarzycki, P.A. Ullrich and D.R. Chevas (2020) "Assessing tropical cyclones' contribution to precipitation over the Eastern United States and sensitivity to the variable-resolution domain extent" J. Hydrometeor. 21(7), pp. 1425-1445, doi: 10.1175/JHM-D-19-0240.1.
(DOI) Gutowski, W.J., P.A. Ullrich, A. Hall, L.R. Leung, T.A. O'Brien, C.M. Patricola, R.W. Arritt, M.S. Bukovsky, K.V. Calvin, Z. Feng, A.D. Jones, G.J. Kooperman, E. Monier, M.S. Pritchard, S.C. Pryor, Y. Qian, A.M. Rhoades, A.F. Roberts, K. Sakaguchi, N. Urban and C. Zarzycki (2020) "The ongoing need for high-resolution regional climate models: Process understanding and stakeholder information" Bull. Amer. Meteor. Soc. 101 (5): E664–E683, doi: 10.1175/BAMS-D-19-0113.1.
(DOI) Roberts, M., J. Camp, J. Seddon, P.L. Vidale, K. Hodges, B. Vanniere, J. Mecking, R. Haarsma, A. Bellucci, E. Scoccimarro, L.-P. Caron, F. Chauvin, L. Terray, S. Valcke, M.-P. Moine, D. Putrasahan, C. Roberts, R. Senan, C. Zarzycki, P.A. Ullrich, Y. Yamada, R. Mizuta, C. Kodama, D. Fu, Q. Zhang, G. Danabasoglu, N. Rosenbloom, H. Wang and L. Wu (2020) "Impact of model resolution on tropical cyclone simulation using the HighResMIP-PRIMAVERA multi-model ensemble" J. Clim. 33 (7), pp. 2557–2583, doi: 10.1175/JCLI-D-19-0639.1.
(DOI) Patricola, C.M., J.P. O'Brien, M.D. Risser, A.M. Rhoades, T.A. O'Brien, P.A. Ullrich, D.A. Stone and W.D. Collins (2020) "Maximizing ENSO as a Source of Western US Hydroclimate Predictability" Clim. Dyn. 54, pp. 351–372, doi: 10.1007/s00382-019-05004-8.
(DOI) Wang, M., P.A. Ullrich and D. Millstein (2020) "Future projections of wind patterns in California with the Variable-Resolution CESM: A clustering analysis approach" Clim. Dyn. 54, pp. 2511-2531, doi: 10.1007/s00382-020-05125-5.
(DOI) Caldwell, P.M., A. Mametjanov, Q. Tang, L.P. Van Roekel, J.‐C. Golaz, W. Lin, D.C. Bader, N.D. Keen, Y. Feng, R. Jacob, M.E. Maltrud, A.F. Roberts, M.A. Taylor, M. Veneziani, H. Wang, J.D. Wolfe, K. Balaguru, P. Cameron-Smith, L. Dong, S.A. Klein, L.R. Leung, H.-Y. Li, Q. Li, X. Liu, R.B. Neale, M. Pinheiro, Y. Qian, P.A. Ullrich, S. Xie, Y. Yang, K. Zhang, Y. Zhang and T. Zhou (2019) "The DOE E3SM coupled model version 1: Description and results at high resolution" Submitted to J. Adv. Model. Earth Sys. 11 (12), pp. 4095-4146, doi: 10.1029/2019MS001870.
(DOI | arXiv) Taylor, M.A., O. Guba, A. Steyer, P.A. Ullrich, D.M. Hall and C. Eldred (2019) "An energy consistent discretization of the nonhydrostatic equations in primitive variables" J. Adv. Model. Earth Sys. 12 (1), e2019MS001783, doi: 10.1029/2019MS001783.
(DOI) Rutz, J., C. Shields, J. Lora, A. Payne, B. Guan, P.A. Ullrich, T. O'Brien, R. Leung, F. Ralph, M. Wehner, S. Brands, A. Collow, A. Gershunov, N. Goldenson, I. Gorodetskaya, H. Griffith, S. Hagos, K. Kashinath, B. Kawzenuk, H. Krishnan, D. Lavers, G. Magnusdottir, P. Nguyen, Prabhat, A. Ramos, S. Sellars, R. Tomé, D. Walister, D. Walton, G. Wick, A. Wilson and M. Viale (2019) "The Atmospheric River Tracking Method Intercomparison Project (ARTMIP): Quantifying Uncertainties in Atmospheric River Climatology" J. Geophys. Res. Atm., 124 (24), pp. 13,777-13,802, doi: 10.1029/2019JD030936.
(DOI | arXiv) Vogl, C.J., A. Steyer, D.R. Reynolds, P.A. Ullrich and C.S. Woodward (2019) "Evaluation of implicit-explicit additive Runge-Kutta integrators for the HOMME-NH dynamical core" J. Adv. Model. Earth Sys. 11 (12), pp. 4228-4244, doi: 10.1029/2019MS001700.
(DOI) Srivastava, A., R. Grotjahn, P.A. Ullrich and M. Risser (2019) "Regional frequency analysis of precipitation over watersheds in Florida and California" Journal of Hydrology 578, 124095, doi: 10.1016/j.jhydrol.2019.124095.
(DOI) Steppeler, J., J. Li, F. Fang, J. Zhu and P. A. Ullrich (2019) "o3o3, a Variant of Spectral Elements with a Regular Collocation Grid" Mon. Weather Rev., 147, pp. 2067–2082, doi: 10.1175/MWR-D-18-0288.1.
(DOI) Zarzycki, C.M., C. Jablonowski, J. Kent, P.H. Lauritzen, R. Nair, K.A. Reed, P.A. Ullrich, D.M. Hall, D. Dazlich, R. Heikes, C. Konor, D. Randall, X. Chen, L. Harris, M. Giorgetta, D. Reinert, C. Kuehnlein, R. Walko, V. Lee, A. Qaddouri, M. Tanguay, H. Miura, T. Ohno, R. Yoshida, J. Klemp, S.-H. Park, W. Skamarock (2019) "DCMIP2016: The splitting supercell test case" Geosci. Model. Dev., 12, pp. 879-892, doi: 10.5194/gmd-12-879-2019.
(DOI) Pinheiro, M.C., P.A. Ullrich and R. Grotjahn (2019) "Atmospheric blocking and intercomparison of objective detection methods: Flow field characteristics" Clim. Dyn., doi: 10.1007/s00382-019-04782-5.
(DOI) Millstein, D., J. Solomon-Culp, M. Wang, P.A. Ullrich and C. Collier (2019) "Wind energy variability and links to regional and synoptic scale weather" Clim. Dyn., 52 (7-8), pp. 4891-4906, doi: 10.1007/s00382-018-4421-y.
(DOI) Rhoades, A.M., A.D. Jones and P.A. Ullrich (2018) "The changing character of mountains as natural reservoirs" Geophys. Res. Lett., 45 (23), pp. 13,008-13,019, doi: 10.1029/2018GL080308.
(DOI) Ullrich, P.A., Z. Xu, A.M Rhoades, M.D. Dettinger, J.F. Mount, A.D. Jones and P. Vahmani (2018) "California's drought of the future: A midcentury recreation of the exceptional conditions of 2012‐2017" Earth's Future, 6 (11), pp. 1568-1587, doi: 10.1029/2018EF001007.
(DOI) Herrington, A.R., P.H. Lauritzen, M.A. Taylor, S. Goldhaber, B.E. Eaton, K.A. Reed and P.A. Ullrich (2018) "Physics-dynamics coupling with element-based high-order Galerkin methods: Quasi equal-area physics grid" Mon. Weather Rev., 147 (1), pp. 69-84, doi: 10.1175/MWR-D-18-0136.1.
(DOI) Ullrich, P.A., D.R. Reynolds, J.E. Guerra and M.A. Taylor (2018) "Impacts and importance of diffusion on the spectral element method: A linear analysis" J. Comput. Phys., 375, pp. 427-446, doi: 10.1016/j.jcp.2018.06.035.
(DOI) Lauritzen, P.H., R.D. Nair, A.R. Herrington, P. Callaghan, S. Goldhaber, J.M. Dennis, J.T. Bacmeister, B.E. Eaton, C.M. Zarzycki, Mark A. Taylor, P.A. Ullrich, T. Dubos, A. Gettelman, R.B. Neale, B. Dobbins, K.A. Reed, C. Hannay, B. Medeiros, J.J. Benedict and J.J. Tribbia (2018) "NCAR CESM2.0 release of CAM-SE: A reformulation of the spectral-element dynamical core in dry-mass vertical coordinates with comprehensive treatment of condensates and energy" J. Adv. Model. Earth Sys., 10 (7), pp. 1537-1570, doi: 10.1029/2017MS001257.
(DOI) Rhoades, A.M., A.D. Jones and P.A. Ullrich (2018) "Assessing mountains as natural reservoirs with a multi-metric framework" Earth's Future, 6 (9), pp. 1221-1241, doi: 10.1002/2017EF000789.
(DOI) Shields, C., J. Rutz, R. Leung, M. Ralph, M. Wehner, B. Kawzenuk, J. Lora, E. McClenny, T. Osborne, A. Payne, P.A. Ullrich, A. Gershunov, N. Goldenson, B. Guan, Y. Qian, A. Ramos, C. Sarangi, S. Sellars, I. Gorodetskaya, K. Kashinath, V. Kurliin, K. Mahoney, G. Muszynski, R. Pierce, A. Sabramanian, R. Tome, D. Waliser, D. Walton, G. Wick, A. Wilson, D. Lavers, Prabhat, A. Collow, H. Krishnan, G. Magnusdottir and P. Nguyen (2018) "Atmospheric River Tracking Method Intercomparison Project (ARTMIP): Project goals and experimental design" Geosci. Model Dev., Volume 11, pp. 2455-2474, doi: 10.5194/gmd-11-2455-2018.
(DOI) Gardner, D.J., J.E. Guerra, F.P. Hamon, D.R. Reynolds, P.A. Ullrich and C.S. Woodward (2018) "Implicit-Explicit (IMEX) Runge-Kutta Methods for non-hydrostatic atmospheric models" Geosci. Model Dev., 11, pp. 1497-1515, doi: 10.5194/gmd-2017-285.
(DOI) Wang, M., P.A. Ullrich, D. Millstein (2018) "The future of wind energy in California: Future projections with the Variable-Resolution CESM" Renewable Energy, 127, pp. 242-257, doi: 10.1016/j.renene.2018.04.031.
(DOI) Xu, Z., A.M. Rhoades, H. Johansen, P.A. Ullrich and W. Collins (2018) "An intercomparison of GCM and RCM dynamical downscaling for characterizing the hydroclimatology of California and Nevada" J. Hydrometeor., 19 (9), pp. 1485-1506, doi: 10.1175/JHM-D-17-0181.1.
(DOI) Ullrich, P.A., C. Jablonowski, J. Kent, P.H. Lauritzen, R. Nair, K.A. Reed, C.M. Zarzycki, D.M. Hall, D. Dazlich, R. Heikes, C. Konor, D. Randall, T. Dubos, Y. Meurdesoif, X. Chen, L. Harris, C. Kuehnlein, V. Lee, A. Qaddouri, C. Girard, M. Giorgetta, D. Reinert, J. Klemp, S.-H. Park, W. Skamarock, H. Miura, T. Ohno, R. Yoshida, R. Walko, A. Reinecke and K. Viner (2017) "DCMIP2016: A Review of Non-hydrostatic dynamical core design and intercomparison of participating models" Geosci. Model. Dev., 10, pp. 4477-4509, doi: 10.5194/gmd-10-4477-2017. [EGU Highlight Paper]
(DOI) Wu, C., X. Liu, Z. Lin, A.M. Rhoades, P.A. Ullrich, C.M. Zarzycki, Z. Lu and S.R. Rahimi-Esfarjani (2017) "Exploring a variable‐resolution approach for simulating regional climate in the Rocky Mountain Region using the VR‐CESM" J. Geophys. Res. Atmospheres, 122 (20), pp. 10,939-10,965, doi: 10.1002/2017JD027008.
(DOI) Wang, M. and P.A. Ullrich (2018) "Marine air penetration in California's Central Valley: Meteorological drivers and the impact of climate change" J. Appl. Meteor. Clim., 57, pp. 137-154, doi: 10.1175/JAMC-D-17-0089.1.
(DOI) Rhoades, A.M., P.A. Ullrich, C.M. Zarzycki, H.Johansen, S.A. Margulis, H. Morrison, Z. Xu and W. Collins (2017) "Sensitivity of mountain hydroclimate simulations in variable-resolution CESM to microphysics and horizontal resolution" J. Adv. Model Earth Sys., 10 (6), pp. 1357-1380, doi: 10.1029/2018MS001326.
(DOI) Zarzycki, C.M. and P.A. Ullrich (2017) "Assessing sensitivities in algorithmic detection of tropical cyclones in climate data" Geophys. Res. Lett., 44 (2), pp. 1141-1149, doi: 10.1002/2016GL071606.
(DOI) Huang, X. and P.A. Ullrich (2017) "The changing character of twenty-first century precipitation over the western United States in the variable-resolution CESM" J. Clim., 30 (18), pp. 7555–7575, doi: 10.1175/JCLI-D-16-0673.1.
(DOI) Rhoades, A.M., P.A. Ullrich and C.M. Zarzycki (2017) "Projecting 21st century snowpack trends in western USA mountains using variable-resolution CESM" Clim. Dyn., 50 (1-2), pp. 261–288, doi: 10.1007/s00382-017-3606-0.
(DOI) Ullrich, P.A. and C.M. Zarzycki (2017) "TempestExtremes v1.0: A framework for scale-insensitive pointwise feature tracking on unstructured grids" Geosci. Model. Dev., 10, pp. 1069-1090, doi: 10.5194/gmd-10-1069-2017.
(DOI) Lauritzen, P.H., M.A. Taylor, J. Overfelt, P.A. Ullrich, R.D. Nair, S. Goldhaber and R. Kelly (2017) "CAM-SE-CSLAM: Consistent coupling of a conservative semi-Lagrangian finite-volume method with spectral-element dynamics" Mon. Weather Rev., 145 (3), pp. 833-855, doi: 10.1175/MWR-D-16-0258.1.
(DOI) Ferguson, J., C. Jablonowski, H. Johansen, P. McCorquodale, P.A. Ullrich and P. Colella (2016) "Analyzing the Adaptive Mesh Refinement (AMR) characteristics of a high-order cubed-sphere shallow water model" Mon. Weather Rev., 144 (12), pp. 4641-4666, doi: 10.1175/MWR-D-16-0197.1.
(DOI) O'Brien, T.A., K. Kashinath, W. Collins, O. Rübel, S. Byna, J. Gu , H. Krishnan, P.A. Ullrich (2016) "Resolution dependence of precipitation statistical fidelity in hindcast simulations" J. Adv. Earth System Model., 8 (2), pp. 976-990, doi: 10.1002/2016MS000671.
(DOI) Huang, X. and P.A. Ullrich (2016) "Irrigation impacts on California's climate with the variable-resolution CESM" J. Adv. Earth System Model., 8 (3), pp. 1151-1163, doi: 10.1002/2016MS000656.
(DOI) Hotta, D., K. Eugenia and P.A. Ullrich (2016) "A semi-implicit modification to Lorenz N-cycle scheme and its application for integration of meteorological equations" Mon. Weather Rev., 144 (6), pp. 2215-2233, doi: 10.1175/MWR-D-15-0330.1.
(DOI) Guerra, J.E. and P.A. Ullrich (2016) "A high-order staggered finite-element vertical discretization for non-hydrostatic atmospheric models" Geosci. Model. Dev., 9, pp. 2007-2029, doi:10.5194/gmd-9-2007-2016.
(Link | DOI) Huang, X., A.M. Rhoades, P.A. Ullrich and C.M. Zarzycki (2016) "An evaluation of the variable resolution-CESM for modeling California’s climate" J. Adv. Earth System Model., 8 (1), pp. 345-369, doi: 10.1002/2015MS000559.
(Link | DOI) Ullrich, P.A., D. Devendran and H. Johansen (2016) "Arbitrary-order conservative and consistent remapping and a theory of linear maps, Part 2" Mon. Weather Rev., 144 (4), pp. 1529-1549, doi: 10.1175/MWR-D-15-0301.1.
(Link | DOI) Rhoades, A.M., X. Huang, P.A. Ullrich and C.M. Zarzycki (2016) "Characterizing Sierra Nevada snowpack using variable-resolution CESM" J. Appl. Meteor. Clim., 55 (1), pp. 173-196, doi: 10.1175/JAMC-D-15-0156.1.
(DOI) Hall, D.M., P.A. Ullrich, K.A. Reed, C. Jablonowski, R.D. Nair and H.M. Tufo (2016) "Dynamical Core Model Intercomparison Project (DCMIP) tracer transport test results for CAM‐SE" Quart. J. Royal Meteor. Soc., 142 (697), pp. 1672–1684, doi: 10.1002/qj.2761.
(DOI) McCorquodale, P., P.A. Ullrich, H. Johansen and P. Colella. (2015) "An adaptive multiblock high-order finite-volume method for solving the shallow-water equations on the sphere" Comm. Appl. Math. Comp. Sci. 10-2, pp. 121-162, doi: 10.2140/camcos.2015.10.121.
(Link | DOI) Ullrich, P.A., K.A. Reed and C. Jablonowski (2015) "Analytical initial conditions and an analysis of baroclinic instability waves in f- and beta-plane 3D channel models." Quart. J. Roy. Meteor. Soc., 141 (693), pp. 2972–2988, doi: 10.1002/qj.2583.
(Link | DOI) Ullrich, P.A. and M.A. Taylor (2015) "Arbitrary-order conservative and consistent remapping and a theory of linear maps, part 1" Mon. Weather Rev., 143, pp. 2419–2440, doi: 10.1175/MWR-D-14-00343.1.
(Link | DOI) Ullrich, P.A. and J.E. Guerra (2015) "Exploring the effects of a high-order vertical coordinate in a non-hydrostatic global model." Procedia Comput. Sci., 51, pp. 2076-2085, doi: 10.1016/j.procs.2015.05.475.
(DOI) Ullrich, P.A. (2014) "A global finite-element shallow-water model supporting continuous and discontinuous elements" Geosci. Model Dev., 7, pp. 5141-5182, doi: 10.5194/gmd-7-3017-2014.
(DOI) Guba, O., M.A. Taylor, P.A. Ullrich, J.R. Overfelt and M.N. Levy (2014) "The spectral element method on variable resolution grids: Evaluating grid sensitivity and resolution-aware numerical viscosity" Geosci. Model Dev., 7, pp. 2803-2816, doi: 10.5194/gmd-7-2803-2014.
(Link | DOI) Zarzycki, C.M., M. Levy, C. Jablonowski, J.R. Overfelt, M.A. Taylor and P.A. Ullrich (2014) "Aquaplanet experiments using CAM's variable resolution dynamical core" J. Climate, 27, pp. 5481-5503, doi:10.1175/JCLI-D-14-00004.1.
(Link | DOI) Ullrich, P.A., P.H. Lauritzen and C. Jablonowski (2014) "A high-order fully explicit flux-form semi-Lagrangian shallow-water model." Int. J. Numer. Meth. Fluids., 75 (2), pp. 103-133, DOI: 10.1002/fld.3887.
(DOI) Lauritzen, P. H., P.A. Ullrich, C. Jablonowski, P.A. Bosler, D. Calhoun, A.J. Conley, T. Enomoto, L. Dong, S. Dubey, O. Guba, A.B. Hansen, E. Kaas, J. Kent, J.-F. Lamarque, M.J. Prather, D. Reinert, V.V. Shashkin, W.C. Skamarock, B. Sørensen, M.A. Taylor and M.A. Tolstykh (2014): "A standard test case suite for two-dimensional linear transport on the sphere: results from a collection of state-of-the-art schemes." Geosci. Model Dev., 7, pp. 105-145, doi:10.5194/gmd-7-105-2014.
(Link | DOI) Ullrich, P.A., T. Melvin, C. Jablonowski and A. Staniforth (2014) "A proposed baroclinic wave test case for deep- and shallow-atmosphere dynamical cores." Quart. J. Royal Meteor. Soc., 140 (682), pp. 1590-1602, doi: 10.1002/qj.2241.
(Link | DOI) Kent, J., P.A. Ullrich and C. Jablonowski (2014) "Dynamical Core Model Intercomparison Project: Tracer transport test cases" Quart. J. Roy. Meteor. Soc., 140 (681), pp. 1279–1293, doi: 10.1002/qj.2208.
(Link | DOI) Ullrich, P.A. (2014) "Understanding the treatment of waves in atmospheric models, Part I: The shortest resolved waves of the 1D linearized shallow water equations" Quart. J. Roy. Meteor. Soc., 140 (682), pp. 1426–1440, doi: 10.1002/qj.2226.
(Link | DOI) Ullrich, P.A. and M.R. Norman (2014) "The Flux-Form Semi-Lagrangian Spectral Element (FF-SLSE) method for tracer transport" Quart. J. Roy. Meteor. Soc., 140 (680), pp. 1069-1085, doi:10.1002/qj.2184.
(Link | DOI) Ullrich, P.A., P.H. Lauritzen and C. Jablonowski (2013) "Some considerations for high-order `incremental remap'-based transport schemes: edges, reconstructions and area integration." Int. J. Num. Methods Fluids, 71 (9), pp. 1131–1151, doi:10.1002/fld.3703.
(Link | DOI) Ullrich, P.A. and C. Jablonowski (2012) "MCore: A nonhydrostatic atmospheric dynamical core utilizing high-order finite-volume methods." J. Comp. Phys., 231 (15), pp. 5078–5108, doi: 10.1016/j.jcp.2012.04.024.
(Link | DOI) Ullrich, P.A. and C. Jablonowski (2011) "Operator-split Runge-Kutta-Rosenbrock methods for nonhydrostatic atmospheric models", Mon. Wea. Rev., 140 (4), pp. 1257-1284, doi: 10.1175/MWR-D-10-05073.1.
(Link | DOI) Ullrich, P.A. and C. Jablonowski (2011) "An analysis of 1D finite-volume methods for geophysical problems on refined grids", J. Comp. Phys., 230 (3), pp. 706-725, doi: 10.1016/j.jcp.2010.10.014.
(Link | DOI) Ullrich, P.A., C. Jablonowski and B. van Leer (2010) "High-order finite-volume models for the shallow-water equations on the sphere", J. Comp. Phys., 229 (17), pp. 6104-6134, doi: 10.1016/j.jcp.2010.04.044.
(Link | DOI) Lauritzen, P.H., R.D. Nair and P.A. Ullrich (2010) "A conservative semi-Lagrangian multi-tracer transport scheme (CSLAM) on the cubed-sphere grid", J. Comp. Phys., 229 (5), pp. 1401--1424, doi: 10.1016/j.jcp.2009.10.036.
(Link | DOI) Ullrich, P.A., P.H. Lauritzen and C. Jablonowski (2009) "Geometrically Exact Conservative Remapping (GECoRe): Regular latitude-longitude and cubed-sphere grids", Mon. Wea. Rev., 137 (6), pp. 1721--1741.

Conference Papers and Published Abstracts

(Link) Ullrich, P.A., G. Jost, B.A. Lelbach and H. Johansen (2016) "Exascale-Ready Programming Models for Climate" Paper for Advancing X-cutting Ideas for Computational Climate Science.
(Link) Ullrich, P.A. (2015) "Recent Advances in the Development of Next-Generation Global Modeling Systems" Extended abstract for Comparative Climates of Terrestrial Planets II, NASA Ames, Moffett Field, California.
(Link) Ullrich, P.A. and J.E. Guerra (2015) "Exploring the Effects of a High-Order Vertical Coordinate in a Non-Hydrostatic Global Model." Conference paper presented at the International Conference on Computational Science: Numerical and Computational Developments to Advance Multiscale Earth System Models (MSESM), Reykjavik, Iceland, June 1-3, 2015.

Conference Papers

(Under Review) Yan, L., B. Wang, G. Hanqi, P.A. Ullrich and L. Van Roekel (2022) "Multi-Level Robustness for 2D Vector Field Feature Tracking,Selection, and Comparison" Submitted to EuroVis 2022

Book Chapters

(Link) Lauritzen, P.H., P.A. Ullrich and R.D. Nair (2011) "Atmospheric transport schemes: Desirable properties and a semi-Lagrangian view on finite-volume discretizations." Chapter in the Springer book 'Numerical Techniques for Global Atmospheric Models.'

Limited Distribution

(Link) O'Brien, T.A., A. Payne, C.A. Shields, J. Rutz, S. Brands, C. Castellano, J. Chen, W. Cleveland, M.J. DeFlorio, N. Goldenson, I. Gorodetskaya, H.I. Díaz, K. Kashinath, B. Kawzenuk, S. Kim, M. Krinitskiy, J.M. Lora, E. McClenny, A. Michaelis, J.P. O’Brien, C.M. Patricola, A.M. Ramos, E.J. Shearer, W.-W. Tung, P.A. Ullrich, M.F. Wehner, K. Yang, R. Zhang, Z. Zhang and Y. Zhou (2020) Detection Uncertainty Matters for Understanding Atmospheric Rivers. Bulletin of the American Meteorological Society 101 (6): E790–E796, doi: 10.1175/BAMS-D-19-0348.1.
(Link) Houlton, B.Z., J. Lund, S. Greco, J. London, H. Margolis, D. Niemeier, J. Ogden, S. Ostoja, P.A. Ullrich, S. Wheeler (2018) Sacramento Summary Report. California’s Fourth Climate Change Assessment. Publication number: SUM-CCCA4-2018-002.
(Link) Mount, J., E. Hanak, K. Baerenklau, V. Butsic, C. Chappelle, A. Escriva-Bou, G. Fogg, G. Gartrell, Td. Grantham, B. Gray, S. Green, T. Harter, D. Jassby, J. Jezdimirovic, Y. Jin, J. Lund, H. McCann, J. Medellin-Azuara, D. Mitchell, P. Moyle, A. Rhoades, K. Schwabe, N. Seavy, S. Stephens, D. Swain, L. Szeptycki, B. Thompson, P.A. Ullrich, J. Viers, Z. Xu (2018) Managing Drought in a Changing Climate: Four Essential Reforms. Published by the Public Policy Institute of California, San Francisco, California.
(Link) Ng, E.G., K. Evans, P. Caldwell, F.M. Hoffman, C. Jackson, K. Kleese Van Dam, R. Leung, D. Martin, G. Ostrouchov, R. Tuminaro, P.A. Ullrich, S.M. Wild and S. Williams (2017) Advancing Cross-Cutting Ideas for Computational Climate Science: Workshop Report, Eds. E.G. Ng and K. Evans.
(Link) Hanak, E., J. Mount, J. Lund, et al. (2016) Climate Change and Water. In: California's Water, published by the Public Policy Institute of California Water Policy Center.
(Link) Ullrich, P.A. and C.M. Zarzycki (2016) Variable and adaptive resolution climate modeling with applications in subseasonal to seasonal extreme weather prediction. In: S2S Predictability of Extreme Weather, US CLIVAR Variations Newsletter Vol. 14, No. 4, Fall 2016, Eds. K. Pegion and S. Wang.

Theses

(Link) Pinheiro, M.C. (2020) Detection and Representation of Atmospheric Blocking: An Examination of Block Characteristics, (PhD Thesis) University of California, Davis.
(Link) Guerra, J.E. (2019) A Development Framework for High Fidelity Non-hydrostatic Simulations of Cross Mountain Flow, (PhD Thesis) University of California, Davis.
(Link) Wang, M. (2019) Projecting Climate Change Impact on the Regional Scale: Future Changes of Wind and Wind Energy in California, (PhD Thesis) University of California, Davis.
(Link) Rhoades, A. (2017) Understanding 21st Century Hydroclimatic Trends in Western USA Mountain Ranges using a Variable-Resolution Global Climate Model, (PhD Thesis) University of California, Davis.
(Link) Huang, X. (2016) Studying Regional Climate with Variable-Resolution CESM, (PhD Thesis) University of California, Davis.
(Link) Ullrich, P.A. (2011) Atmospheric Modeling with High-Order Finite-Volume Methods, (PhD Thesis) University of Michigan.
(Link) Ullrich, P.A. (2007) Exact and Perturbed Friedmann-Lemaitre Cosmologies, (Master's Thesis) University of Waterloo.

Media Authored

(Link) Weijer, W., F. Hoffman, P.A. Ullrich, M. Wehner and J. Liu (2019) "The RGMA CMIP6 Hackathon: A Coordinated and Distributed Effort to Collaboratively Analyze Climate Model Data" Eos, 100, doi: 10.1029/2019EO137735. Published on 23 December 2019.

Media Apperances

(No Link) "Climate change, drought and deluge weather patterns" CBS13 Sacramento Evening News, December 13, 2021.
(Link) Nelson, Cathy "How climate change is affecting winter" Blissmark, November 18, 2021.
(Link) "Conversation with Climate Scientists" US Department of Energy, November 5, 2021.
(Link) Siegler, Kirk "Prolonged Heat And Smoke Is Taking Its Toll On West Coast Residents" National Public Radio, September 12, 2021.
(Link) Janssen, Heather "September Sizzle: Are Sacramento Summers Getting Hotter and Longer?" CBS13 Sacramento, September 8, 2021.
(Link) Karlamangla, Soumya "Is This the Coldest Summer of the Rest of Our Lives?" New York Times, August 30, 2021.
(No Link) "Hurricane Ida Coverage" MSNBC, August 29, 2021.
(Link) Davidson, Amelia "Wildfire smoke poses health risks across US. Why has Sacramento been spared so far?" The Sacramento Bee, July 22, 2021.
(Link) Haefeli, Laura "Insufficient Rain Has California Fires Burning Hotter Than Normal, UC Davis Professor Says" CBS13 Sacramento, July 20, 2021.
(Link) Woods, Monica "New Climate Normals will be revealed on May 4. Here is what that means and why it is important" ABC10 Sacramento, May 3, 2021.
(Link) Parakul, Narimes "Why Are Natural Disasters Intensifying?" UC Davis Magazine, March 22, 2021.
(No Link) "Anomalously dry weather in 2020" ABC10 News, January 12, 2021.
(Link) Rudgard, Olivia "Here in California, we feel helpless as wildfires send us in a depressing second lockdown" The Telegraph, September 10, 2020.
(Link) Karlis, Nicole "Why west coast wildfires are turning the skies red" Salon, September 9, 2020.
(Link) Payne, Madeleine "Dry conditions linked to climate change contributed to wildfire spread in Northern California" The California Aggie, September 1, 2020.
(Link) Winniford, Eden "Lightning strikes spark Hennessy fire, burning over 350,000, forcing parts of Vacaville to evacuate" The California Aggie, August 30, 2020.
(No Link) "California Wildfires" KRON4 News, August 21, 2020.
(Link) Goddard, Jacqui "Death Valley the ‘hottest place on Earth’ in a century" The Times, August 18, 2020.
(Link) Clifford, Catherine "See NASA’s images of hurricane Laura and California wildfires — they point to the effects of climate change" CNBC, August 27, 2020.
(Link) Romero, Ezra "Drought In California Seems Inevitable. But Experts Say Don’t Panic." Capital Public Radio, February 28, 2020.
(Link) Kaufman, Mark "California’s strengthening storms mean more billion-dollar disasters" Mashable, December 4, 2019.
(Link) Rudgard, Olivia "Wildfires and climate change are taking California to the brink - is it a taste of a world to come?" The Daily Telegraph, November 4, 2019.
(Link) Rogers, Adam "Shifting Winds and the Changing Shape of California Fires" Wired, October 29, 2019.
(Link) Miyamoto, Juju "Scientists blame strange weather on climate crisis" Blue Devil Hub, October 25, 2019.
(Link) Robinson, Foxy "UC Davis researchers model climate change impact and search for resilient options on campus" California Aggie, Davis, May 30, 2019.
(Link) Sacks, Brianna "Photos Show California Residents Paddling Around As Catastrophic Floods Turn Towns Into Islands" Buzzfeed News, February 28, 2019.
(Link) Kaufman, Mark "A powerful atmospheric river pummeled California" Mashable, February 28, 2019.
(Link) "Fire & Destruction: Paradise Lost" FOX 40 KTXL, Podcast Interview, February 25, 2019.
(No Link) "The Atmospheric River Scale", CBS-13 Sacramento, Television Interview, February 5, 2019.
(No Link) "The Polar Vortex", SkyNews UK, Television Interview, January 31, 2019.
(Link) Kaufman, Mark "When will this terrible wildfire season in California end?" Mashable.com, November 22, 2018.
(Link) Johnson, Doug "Meteorologists, Visitors Keeping Close Eye on Hurricane Willa" Fox 40 KTXL, October 22, 2018.
(Link) Kasler, Dale "Northern California wildfires are burning much earlier this summer. Here's why." Sacramento Bee, July 2, 2018.
(No Link) "Hurricane Irma", MSNBC Television Interview, September 10, 2017.
(Link) Diaz, Joan "Harvey offers grim glimpse into climate’s future" San Francisco Chronicle, September 2, 2017.
(Link) Greenhill, Simon "Despite skepticism, UC scientists affirm link between extreme weather and climate change" The Daily Californian, September 6, 2017.
(Link) Kasler, Dale "Heat wave, fires, hurricanes bear the 'fingerprints of climate change,' scientists say" Sacramento Bee, September 5, 2017.
(No Link) Harris, Ryan "Future heat waves" News Radio KFBK Radio Interview, June 21, 2017.
(Link) Brown, Taylor Kate "California's drought is over. Now what?" BBC News, Washington, January 18, 2017.
(No Link) "Long term drought in California", Capitol Television News Service Television Interview, Sacramento, October 14, 2016.
(Link Purvis, Katherine "Where are the world’s most water-stressed cities?" The Guardian, July 29, 2016.
(No Link) "El Nino Weather" The Water Zone, NBC Radio, KCAA 1050 AM Radio Interview, December 16, 2015.
(Link) Ruyak, Beth "Impact of Climate Change on Storms" Capital Public Radio Insight, November 13, 2013.

Posters

(Link) Ullrich, P.A., J.E. Guerra, M. Pinheiro and J. Fong (2015) "Tempest: Tools for Addressing the Needs of Next-Generation Climate Models"
(Link) Ullrich, P.A., C. Jablonowski, J. Kent, K.A. Reed, M.A. Taylor, P.H. Lauritzen and R. Nair (2012) "Towards a Unified Test Case Suite for Global Atmospheric Models."
(Link) Ullrich, P.A. and C. Jablonowski (2011) "MCore: A High-Order Finite-Volume Dynamical Core"
(Link) Ullrich, P.A. and C. Jablonowski (2010) "High-order finite-volume methods for geophysical flow problems"
(Link) Ullrich, P.A., P.H. Lauritzen, C. Jablonowski (2008) "GECoRe: A Geometrically Exact Remapping Scheme on the Sphere"
(Link) Ullrich, P.A. (2008) "Parallel Load Balancing on a Cubed Sphere Grid"

Presentations

Ullrich, P.A. (2019) "Feature Tracking in TempestExtremes: Automated Detection and Characterization of Extreme Weather" Poster presentation at the American Geophysical Union Fall Meeting 2019, San Francisco, CA. December 11, 2019.
Ullrich, P.A. and W. Gutowski (2019) "The ongoing need for high-resolution regional climate models: Process understanding and stakeholder information" Invited presentation to the US Global Change Research Program's Interagency Group on Integrative Modeling (IGIM), Washington, DC. November 13, 2019.
Ullrich, P.A. (2019) "Extreme Weather Under Climate Change" Invited presentation to the Napa Valley Climate of Action Symposium, Napa, CA. October 12, 2019.
Ullrich, P.A. (2019) "A Review of Recent Advances in Climate Modeling Across Scales" Invited presentation at Meteorology and Climate - Modeling for Air Quality Conference, Davis, California. September 11, 2019.
Ullrich, P.A. (2019) "HyperFACETS: Ongoing Developments of Use-Inspired Hydroclimate Metrics" Invited presentation at the Department of Energy Precipitation Metrics Workshop, Washington, DC. July 1, 2019.
Ullrich, P.A. (2019) "Past and Current State of Modeling and Downscaling California’s Climate" Invited presentation at the California Extreme Precipitation Symposium (CEPSYM), University of California, Davis, Davis, California. June 25, 2019.
Ullrich, P.A. (2019) "Sacramento Valley Regional Report Key Findings, California's Drought of the Future" Invited speaker at the Sacramento Valley Regional Climate Symposium, University of California, Davis, Davis, California. February 6, 2019.
Ullrich, P.A. (2018) "California’s Drought of the Future (2042-2047)" Invited presentation at the Chinese Academy of Sciences Institute for Atmospheric Physics. August 1, 2018.
Ullrich, P.A. (2018) "Hyperion: Understanding Hydroclimate Data with Use-Inspired Metrics" Presentation to California Water Security Collaborative, Sacramento, California. May 25, 2018.
Ullrich, P.A. (2018) "Hyperion: Understanding Hydroclimate Data with Use-Inspired Metrics" Poster presentation to Community Earth System Model Annual Workshop, Boulder, Colorado. June 18-20, 2018.
Ullrich, P.A. (2018) "Hyperion: Understanding Hydroclimate Data with Use-Inspired Metrics" Invited presentation to Lawrence Livermore National Laboratory, Livermore, California. May 9, 2018.
Ullrich, P.A. (2018) "California’s Drought of the Future" Invited presentation at the Public Policy Institute of California "Dry Run for a Dry Future" meeting, San Francisco, California. April 27, 2018.
Ullrich, P.A. (2018) "Hyperion: Understanding Hydroclimate Data with Use-Inspired Metrics" Invited remote presentation to the United States Global Change Research Program (USGCRP). February 1, 2018.
Ullrich, P.A. (2017) "Attributing Climate Change: The Fingerprints of Human Activity on Weather Extremes" Invited presentation to the Sierra Club Yolano Group, Davis, California. December 14, 2017.
Ullrich, P.A. and M. Wang (2017) "Wind in California: Marine Air Intrusion and Wind Power Generation" Remote presentation at the Regional and Global Climate Modeling Extremes group. November 9th, 2017.
Ullrich, P.A. (2017) "Extreme Weather Attribution" Invited presentation to the Yolo County Climate Compact, Davis, California. October 13, 2017.
Ullrich, P.A. and M. Wang (2017) "Advances in variable resolution climate and weather modeling" Presentation at the Meteorology and Climate - Modeling for Air Quality Conference, Davis, California. September 13, 2017.
Ullrich, P.A. et al. (2017) "Hyperion: Understanding Hydroclimate Data with Use-Inspired Metrics" Poster presentation at the 22nd Annual CESM workshop (CVCWG), Boulder, Colorado. June 19-22, 2017.
Rhoades, A., Ullrich, P.A., Johansen, H., Xu, Z., Zarzycki, C.M. and W.D. Collins (2017) "A Variable-Resolution CESM Case Study of the Comparative Importance of Model Resolution and Microphysics in a Mountainous Region" Presentation at the 22nd Annual CESM Workshop, Boulder, Colorado. June 19-22.
M. Wang, Ullrich, P.A., Millstein, D. and Collier, C. (2017) "The future of wind energy in California: Future projections in Variable-Resolution CESM" Presentation at the 22nd Annual CESM workshop (CVCWG), Boulder, Colorado. June 20, 2017.
Rhoades, A., Ullrich, P.A., Johansen, H., Xu, Z., Zarzycki, C.M. and W.D. Collins (2017) "Understanding western USA mountain hydroclimatology under present and future conditions using a next-generation variable-resolution global climate model" 2nd place poster presentation at the 2017 The Sierra Fund "Reclaiming the Sierra" Conference, Sacramento, California. May 8-9, 2017.
Ullrich, P.A. et al. (2017) "Hyperion: Understanding Hydroclimate Data with Use-Inspired Metrics" Invited presentation to the Water Utility Climate Alliance. April 24, 2017.
Ullrich, P.A. (2017) "Tempest: Software Tools for Addressing the Needs of Next-Generation Climate Science" Invited presentation at Stanford University, Stanford, California. January 27, 2017.
Ullrich, P.A., C.M. Zarzycki, M. Wang and A. Rhoades (2016) "Climate model applications at the scale of NWP" Invited presentation at AGU Fall Meeting (IN13D-08), San Francisco, California. December 15, 2016.
M. Wang, Ullrich, P.A. (2016) "Marine Air Penetration: The Effect of Synoptic-scale Change on Regional Climate" Poster presentation at AGU Fall Meeting (A13E-0314), San Francisco, California. December 12, 2016.
Ullrich, P.A., C.M. Zarzycki and R. Grotjahn (2016) "TempestExtremes: Automated Detection and Characterization of Extreme Weather" Presentation at AGU Fall Meeting (A44F-01), San Francisco, California. December 12, 2016.
Rhoades, A., Ullrich, P.A., Johansen, H., Xu, Z., Zarzycki, C.M. and W.D. Collins (2016) "Understanding California Mountain Wintertime Hydroclimate Trends using an Ensemble of High-Resolution Variable-Resolution CESM Simulations" Poster presentation at the AGU Fall Meeting (A21F-0132), San Francisco, California. December 12-16, 2016.
Ullrich, P.A. and C.M. Zarzycki (2016) "Variable and adaptive resolution climate modeling with applications in subseasonal to seasonal extreme weather prediction" Invited CLIVAR Variations Webinar. December 8, 2016.
Rhoades, A., Ullrich, P.A., Johansen, H., Xu, Z., Zarzycki, C.M. and W.D. Collins (2016) "Understanding western USA mountain hydroclimatology under present and future conditions using a next-generation variable-resolution global climate model" Poster presentation at the 2016 Mountain Climate (MtnClim) Conference, Leavenworth, Washington. October 17-21, 2016.
Ullrich, P.A. and J.E. Guerra (2016) "Tempest: A Framework for Experimental Numerical Methods" Presentation at SIAM Mathematics of Planet Earth, Philadelphia, Pennsylvania, October 2, 2016.
Ullrich, P.A., B. Lelbach, H. Johansen, P. Jones (2016) "New Programming Models for Climate: Bringing Climate Models to the Exascale" Invited presentation at Advancing X-cutting Ideas for Computational Climate Science (AXICCS), Washington, D.C. September 12, 2016.
Ullrich, P.A. (2016) "TempestExtremes: Indicators of change in the characteristics of extreme weather" Invited presentation at NASA Ames, Moffett Field, California. May 17, 2016.
Guerra, J.E. and P.A. Ullrich (2016) "Efficient Computation of Atmospheric Flows with Tempest: Validation of Next-Generation Climate and Weather Prediction Algorithms at Non-Hydrostatic Scales" Presentation at the European Geophyscial Union, Vienna, Austria. Abstract EGU2016-9160. April 19, 2016.
Rhoades, A., C. Zarzycki and P.A. Ullrich (2016) "Understanding hydroclimatic changes in western USA mountain ranges using the variable-resolution CESM (VR-CESM) multiscale method" Presentation at the Atmospheric Model Working Group Meeting, National Center for Atmospheric Research, Boulder, Colorado. February 9, 2016.
Ullrich, P.A. (2016) "Drought in California: A Climatological Look at Water in a Semi-Arid Landscape" Invited seminar at the California Water Policy Seminar Series on Drought (ECI 298), University of California Davis, Davis, California. January 11, 2016.
Ullrich, P.A., J.E. Guerra, M. Pinheiro and J. Fong (2015) "Tempest: Tools for Addressing the Needs of Next-Generation Climate Models" Poster presentation at the American Geophysical Union, San Francisco, California. Abstract NG23A-1778. December 14-18, 2015.
Rhoades, A., X. Huang, C. Zarzycki and P.A. Ullrich (2015) "Projecting 21st Century Snowpack Trends in the Western United States using Variable-Resolution CESM" Presentation at the American Geophysical Union, San Francisco, California. Abstract A53G-07. December 14-18, 2015.
Guerra, J.E. and P.A. Ullrich (2015) "Efficient Computation of Atmospheric Flows with Tempest: Development of Next-Generation Climate and Weather Prediction Algorithms at Non-Hydrostatic Scales" Poster presentation at the American Geophysical Union, San Francisco, California. Abstract NG23A-1779. December 14-18, 2015.
Huang, X., A. Rhoades, P.A. Ullrich and C. Zarzycki (2015) "High-resolution regional climate model evaluation using variable-resolution CESM over California" Poster presentation at the American Geophysical Union, San Francisco, California. Abstract A51J-0198. December 14-18, 2015.
Rhoades, A., C.M. Zarzycki and P.A. Ullrich (2015) "Understanding 21st Century Hydroclimatic Trends in Western USA Mountain Ranges using Variable-Resolution CESM" Presentation at the Lawrence Berkeley National Laboratory Climate Brown Bag, Berkeley, California. December 7, 2015.
Ullrich, P.A. (2015) "Working with Finite Elements: Addressing a Paradigm Shift in Geosciences Modeling" Invited talk at the Naval Research Laboratory, Monterey, California. December 3, 2015.
Ullrich, P.A. (2015) "Tempest: Tools for Addressing the Needs of Next-Generation Climate Models" Presentation at the Workshop on Partial Differential Equations on the Sphere, Seoul, South Korea. October 19 - 22, 2015.
Ullrich, P.A. (2015) "Reaching High Spatial Resolutions with Regionally Refined Global Climate Models" Presentation at the Meteorology And Climate - Modeling for Air Quality Conference, Sacramento, California. September 16 - 18, 2015.
Ullrich, P.A. (2015) "Recent Advances in the Development of Next-Generation Global Modeling Systems" Invited presentation at Comparative Climates of Terrestrial Planets II, NASA Ames, Moffett Field, California. September 8 - 11, 2015.
Rhoades, A., X. Huang, P.A. Ullrich and C. Zarzycki (2015) "Projecting 21st Century Sierra Nevada Snowpack Using a Next-Generation Variable Resolution Model" Poster presentation at the California Climate Change Symposium 2015, Sacramento, California. August 24 - 25, 2015.
Ullrich, P.A. (2015) "Towards Robust Multi-Scale Global Atmospheric Models" Presentation at SIAM Geosciences 2015, Palo Alto, California. June 29 - July 2, 2015.
Ullrich, P.A. and J.E. Guerra (2015) "Exploring the Effects of a High-Order Vertical Coordinate in a Non-Hydrostatic Global Model" Conference paper presented at the International Conference on Computational Science: Numerical and Computational Developments to Advance Multiscale Earth System Models (MSESM), Reykjavik, Iceland, June 1-3, 2015.
Guerra, J.E. and P.A. Ullrich (2015) "Arbitrary-Order Staggered Finite-Element Methods for Geophysical Flows" Presentation at SIAM Computer Science and Engineering (CS&E) 2015, Salt Lake City, Utah. March 18, 2015.
Ullrich, P.A. and J.E. Guerra (2015) "Tempest: Efficient Computation of Atmospheric Flows Using High-Order Local Discretization Methods" Presentation at SIAM Computer Science and Engineering (CS&E) 2015, Salt Lake City, Utah. March 18, 2015.
Ullrich, P.A., A. Rhoades, X. Huang and C. Zarzycki (2015) "An Assessment of Variable-Resolution Climate Modeling in CAM" Presentation at the Community Earth System Model Atmospheric Model Working Group Meeting 2015, National Center for Atmospheric Research, Boulder, Colorado. February 19, 2014.
Rhoades, A., P. Ullrich, C. Zarzycki, M. Levy, M. Taylor (2014) "Variable-Resolution Ensemble Climatology Modeling of Sierra Nevada Snowpack within the Community Earth System Model (CESM)" Presentation at the American Geophysical Union Fall Meeting 2014, San Francisco, California. December 19, 2014.
Guerra, J.E. and P.A. Ullrich (2014) "Tempest: Mesoscale test case suite results and the effect of order-of-accuracy on pressure gradient force errors" Poster presentation at the American Geophysical Union Fall Meeting 2014, San Francisco, California. December 16, 2014.
Ullrich, P.A. and J.E. Guerra (2014) "Tempest – Efficient Computation of Atmospheric Flows Using High-Order Local Discretization Methods" Poster presentation at the American Geophysical Union Fall Meeting 2014, San Francisco, California. December 16, 2014.
Ferguson, J., C. Jablonowski, H. Johansen, R. English, P. McCorquodale, P. Colella, J. Benedict, W. Collins, J. Johnson and P. Ullrich (2014) "Assessing Grid Refinement Strategies in the Chombo Adaptive Mesh Refinement Model" Presentation at the American Geophysical Union Fall Meeting 2014, San Francisco, California. December 15, 2014.
Ullrich, P.A., J.E. Guerra, A. Rhoades, X. Huang and C.M. Zarzycki (2014) "Towards Robust Multi-Scale Global Atmospheric Models" Invited presentation at the University of Kansas, Lawrence, Kansas. December 1, 2014.
Ullrich, P.A., A. Rhoades, X. Huang and C.M. Zarzycki (2014) "Bringing Global Climate Models to the Regional Scale" Invited presentation at the University of California Irvine, Irvine, California. November 12, 2014.
Ullrich, P.A. and J.E. Guerra (2014) "Seeking Robust Solutions to the Pressing Problems in Global Atmospheric Modeling" Invited presentation at the University of Washington, Seattle, Washington. September 25, 2014.
Guerra, J.E. nad P.A. Ullrich (2014) "HARDCore: Efficient Computation of Atmospheric Flows with Arbitrary Order Local Discretization Methods" Presentation at SIAM 2014, Chicago, Illinois. July 7, 2014.
Ullrich, P.A. and J.E. Guerra (2014) "Efficient Computation of Atmospheric Flows using High-Order Local Discretization Methods" Presentation at ICOSAHOM 2014, Salt Lake City, Utah. June 25, 2014.
Ullrich, P.A. and J.E. Guerra (2014) "Arbitrary-Order Hybrid Finite-Element Methods for Geophysical Flows" Presentation at Partial Differential Equations on the Sphere 2014, Boulder, Colorado. April 10, 2014.
Ullrich, P.A. (2014) "Towards Robust Multi-Scale Atmospheric Models" Invited presentation at the UC Davis Graduate Group in Applied Mathematics Symposium, Davis, California. January 25, 2014.
Rhoades, A., P.A. Ullrich and C.M. Zarzycki (2013) "Variable Resolution Modeling of California Snowpack within the Community Earth System Model (CESM)" Presentation at the American Geophysical Union Fall Meeting 2013, San Francisco, California. December 12, 2013.
Rhoades, A., P.A. Ullrich, C.M. Zarzycki, M. Levy and M.A. Taylor (2013) "Variable Resolution Modeling of Sierra Nevada Snowpack" Poster presentation at the American Geophysical Union Fall Meeting 2013, San Francisco, California. December 11, 2013.
Ullrich, P.A. and J. Guerra (2013) "Arbitrary-Order Hybrid Finite-Element Methods for Geophysical Flows" Presentation at the American Geophysical Union Fall Meeting 2013, San Francisco, California. December 11, 2013.
Ullrich, P.A. (2013) "Towards Robust Multi-Scale Atmospheric Models" Invited presentation at the High-Performance Computational Science with Structured Meshes and Particles (HPCS-SMP), Lawrence Berkeley National Laboratory, Berkeley, California. October 14, 2013.
Ullrich, P.A. (2013) "Recent Advances in Climate Modeling on the Regional and Global Scale" Invited presentation at the California Air Resources Board, Sacramento, California. September 27, 2013.
Ullrich, P.A. (2013) "Towards the Next Generation of Numerical Methods for Geophysical Simulation" Invited presentation at the Naval Postgraduate School, Monterey, California. August 29, 2013.
Ullrich, P.A. (2013) "Towards the Next Generation of Numerical Methods for Geophysical Simulation" Invited presentation at the Korean Institute for Atmospheric Prediction Systems, Seoul, South Korea. August 21, 2013.
Ullrich, P.A. (2013) "High-Order Geometrically Exact Conservative Remapping" Invited presentation at the Korean Institute for Atmospheric Prediction Systems, Seoul, South Korea. August 20, 2013.
Ullrich, P.A. (2013) "A Better Understanding of the Earth System Through Advances in CFD" Invited presentation at Four Decades of CFD: Looking Back and Moving Forward, San Diego, California. June 22-23, 2013.
Ullrich, P.A and A. Rhoades. (2013) "Variable Resolution Modeling of California Snowpack within the Community Earth System Model (CESM)" and "SQuadGen: A New Tool for Generation of Variable Resolution Quadrilateral Meshes." Poster presentation at the 2013 CESM Workshop, Breckenridge, Colorado. June 17-20, 2013.
Ullrich, P.A. (2013) "Recent Advances in the Simulation of Global Atmospheric Dynamics." Invited presentation at Lawrence Berkeley National Laboratory, Berkeley, California. April 29, 2013.
Ullrich, P.A. (2013) "Conservative Semi-Lagrangian Methods on the Cubed-Sphere." Presentation at the Society for Industrial and Applied Mathematics (SIAM) Computer Science and Engineering Meeting, Boston, Massachusetts. February 27, 2013.
Ullrich, P.A. (2013) "Understanding the treatment of waves in atmospheric models: The shortest resolved waves of the linear wave equation." Invited presentation at the University of California Berkeley, Berkeley, California. February 20, 2013.
Ullrich, P.A., C. Jablonowski, J. Kent, K.A. Reed, M.A. Taylor, P.H. Lauritzen and R. Nair (2012) "Towards a Unified Test Case Suite for Global Atmospheric Models." Poster presentation at the 2012 Fall Meeting, American Geophysical Union, San Francisco, CA, December 3-7, 2012.
Ullrich, P. A. (2012) "Recent Advances in Climate Modeling on the Regional and Global Scale." Presentation at the California Air Resources Board, Sacramento, California. October 3, 2012.
Ullrich, P. A. (2012) "MCore: New Approaches to Numerical Modeling of the Atmosphere." Presentation at the 2012 PDEs on the Sphere Meeting, Cambridge, U.K. September 27, 2012.
Ullrich, P. A. (2012) "New Approaches to Numerical Modeling of the Regional-Global Climate." Invited presentation at the University of Michgian AIM Seminar, Ann Arbor, Michigan. March 23, 2012.
Ullrich, P. A. (2012) "New Approaches to Numerical Modeling of Regional-Global Climate." Invited presentation at the University of Illinois, Champaign, Illinois. March 7, 2012.
Ullrich, P. A. (2012) "New Approaches to Numerical Modeling of the Atmosphere." Invited presentation at the University of California Los Angeles, Los Angeles, California. February 15, 2012.
Ullrich, P. A. (2012) "New Approaches to Numerical Modeling of the Atmosphere." Invited presentation at the University of California Davis, Davis, California. January 17, 2012.
Ullrich, P. A. (2012) "New Approaches to Numerical Modeling of the Atmosphere." Invited presentation at the Lawrence Berkeley National Laboratory, Berkeley, California. January 13, 2012.
Ullrich, P. A. and C. Jablonowski (2011) "MCore: Advances in high-order modeling of the global atmosphere." Presentation at American Geophysical Union Fall Meeting 2011, San Francisco, CA, USA, December 5-9, 2011.
Ullrich, P. A. (2011) "New Approaches to Numerical Modeling of the Atmosphere." Invited presentation at the University of Waterloo, Waterloo, Ontario, Canada. November 25, 2011.
Jablonowski, C., P. A. Ullrich and K. A. Reed (2011) "High-Order Methods and Nonhydrostatic Designs on Quasi-Uniform and Variable-Resolution Grids: Tackling the Numerical Challenges for Future-Generation GCMs." Invited presentation at the Global-to-Regional Climate Simulation Workshop, Santa Fe, NM, USA, August 3-5, 2011.
Jablonowski, C. and P. A. Ullrich (2011) "A High-Order Finite-Volume Scheme for the Dynamical Core of Weather and Climate Models." Invited presentation at the Scientic Discovery through Advanced Computing Program (SciDAC) Conference, Denver, CO, USA, July 10-14, 2011.
Ullrich, P.A. and Jablonowski, C. (2011) "MCore: A High-Order Finite-Volume Dynamical Core." Presentation at the 16th Annual CESM Workshop, Breckenridge, CO, USA, June 20-23, 2011.
Ullrich, P.A. (2011) "High-Order Finite-Volume Methods for Atmospheric Transport." Presentation at the Workshop on Transport Schemes on the Sphere, Boulder, CO, USA, March 31, 2011.
Ullrich, P.A. (2011) "Towards the Next Generation of Climate Models." Presentation at the SIAM Conference of the Geosciences, Long Beach, CA, USA, March 24, 2011.
Jablonowski, C. and Ullrich, P.A. (2011) "A High-Order Finite-Volume Technique for Nonhydrostatic Dynamic Cores on (Adaptive) Cubed-Sphere Grids." Presentation at the NCAS meeting, Boulder, CO, USA, March 7-9 2011.
Ullrich, P.A. (2011) "Towards the Next Generation of Climate Models." Presentation at the University of Michigan Seminar Series, Ann Arbor, MI, USA, January 10, 2011.
Ullrich, P.A. (2010) "High-order finite-volume methods for geophysical flow problems" Presentation at American Geophysical Union Fall Meeting 2010, San Francisco, CA, USA, December 13-17, 2010.
Ullrich, P.A. (2010) "High-order finite-volume schemes for simulating atmospheric flows" Poster presentation at the Engineering Graduate Symposium, Ann Arbor, MI, USA, November 12, 2010.
Ullrich, P.A. (2010) "A look at high-order finite-volume schemes for simulating atmospheric flows" Presentation at the Workshop on Solutions to Partial Differential Equations on the Sphere, Potsdam, Germany, August 22-27, 2010.
Ullrich, P.A. (2010) "High-order finite-volume methods for geophysical flow problems" Poster presentation at the NSF Institute for Pure and Applied Mathematics (IPAM), Workshop II: Numerical Hierarchies for Climate Modeling, Los Angeles, CA, USA, April 16, 2010.
Jablonowski, C.J. and Ullrich, P.A. (2010) "An Analysis of Finite-Volume schemes: High-order Methods and Grid Reflections on Adaptive Grids" Invited presentation at the NSF Institute for Pure and Applied Mathematics (IPAM), Workshop II: Numerical Hierarchies for Climate Modeling, Los Angeles, CA, USA, April 16, 2010.
Ullrich, P.A. (2010) "High-order finite-volume methods for geophysical flow problems" Poster presentation at the Michigan Geophysical Union, Ann Arbor, MI, USA, March 26, 2010.
Ullrich, P.A. (2009) "Riemann-Solver Based Shallow-Water FV Models on the Sphere" Poster presentation at the Engineering Graduate Symposium, Ann Arbor, MI, USA, November 13, 2009.
Ullrich, P.A. (2009) "Riemann-Solver Based Shallow-Water FV Models on the Sphere" Invited Talk at Field's Workshop on Dynamics in Environmental and Geophysical Flows, Waterloo, Ontario, Canada, July 27-29, 2009.
Ullrich, P.A. (2009) "GECoRe: A Geometrically Exact Remapping Scheme on the Sphere" Presentation at the Workshop on Solutions to Partial Differential Equations on the Sphere, Santa Fe, USA, April 27-30, 2009.
Ullrich, P.A. (2009) "GECoRe: A Geometrically Exact Remapping Scheme on the Sphere" Poster presentation at the Michigan Geophysical Union 2009, Ann Arbor, MI, USA, March 20, 2009.
Ullrich, P.A., P.H. Lauritzen, C. Jablonowski (2008) "GECoRe: A Geometrically Exact Remapping Scheme on the Sphere" Poster presentation at the American Geophysical Union Fall Meeting 2008, San Francisco, CA, USA, December 15-19, 2008.
Ullrich, P.A. (2008) "GECoRe: A Geometrically Exact Remapping Scheme on the Sphere" Poster presentation at the Engineering Graduate Symposium, Ann Arbor, MI, USA, November 7, 2008.
Ullrich, P.A. (2008) "Parallel Load Balancing on a Cubed Sphere Grid" Poster presentation at the Michigan Geophysical Union 2008, Ann Arbor, MI, USA, March 16, 2008.