

 (Under Review) Ullrich, P.A., Z. Xu, A. Rhoades, M.D. Dettinger, J.F. Mount, A.D. Jones, and P. Vahmani (2018) "California's Drought of the Future: A Prospective Look at the 20122017 Drought" Submitted to Earth's Future
 (Under Review) 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 (2018) "DCMIP2016: The splitting supercell test case" Submitted to Geosci. Model. Dev.
 (Under Revision) Guerra, J.E., P.A. Ullrich, and J. Bachmeister (2018) "An assessment of the Lindzen/McFarlane orographic gravity wave drag parameterization at nonhydrostatic scales" Submitted to J. Adv. Model. Earth Sys.
 (Under Revision) Herrington, A.R., P.H. Lauritzen, M.A. Taylor, S. Goldhaber, B.E. Eaton, K.A. Reed, and P.A. Ullrich (2018) "Physicsdynamics coupling with elementbased highorder Galerkin methods: Quasi equalarea physics grid" Submitted to Mon. Weather Rev.
 (Under Review) Pinheiro, M.C., P.A. Ullrich, and R. Grotjahn (2018) "Atmospheric blocking and intercomparison of objective detection methods: Flow field characteristics" Submitted to Climate Dynamics
 (Early Release) 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" Journal of Computational Physics, doi: 10.1016/j.jcp.2018.06.035.
 (Under Revision) Millstein, D., J. SolomonCulp, M. Wang, P.A. Ullrich, and C. Collier (2018) "Wind energy variability and links to regional and synoptic scale weather" Submitted to Climate Dynamics
 (Early Release) 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 CAMSE: A reformulation of the spectralelement dynamical core in drymass vertical coordinates with comprehensive treatment of condensates and energy" J. Adv. Model. Earth Sys., doi: 10.1029/2017MS001257.
 (In Press) Rhoades, A.M., P.A. Ullrich, and A.D. Jones (2018) "Assessing mountains as natural reservoirs with a multimetric framework" Submitted to Earth's Future
 (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. 24552474, doi: 10.5194/gmd1124552018.
 (DOI) Gardner, D.J., J.E. Guerra, F.P. Hamon, D.R. Reynolds, P.A. Ullrich, and C.S. Woodward (2018) "ImplicitExplicit (IMEX) RungeKutta Methods for nonhydrostatic atmospheric models" Geosci. Model Dev., Volume 11, pp. 14971515, doi: 10.5194/gmd2017285.
 (DOI) Wang, M., P.A. Ullrich, D. Millstein (2018) "The future of wind energy in California: Future projections with the VariableResolution CESM" Renewable Energy., Volume 127, pp. 242257, doi: 10.1016/j.renene.2018.04.031.
 (In Press) 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.
 (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 Nonhydrostatic dynamical core design and intercomparison of participating models" Geosci. Model. Dev., Volume 10, pp. 44774509, doi: 10.5194/gmd1044772017. [EGU Highlight Paper]
 (DOI) Wu, C., X. Liu, Z. Lin, A.M. Rhoades, P.A. Ullrich, C.M. Zarzycki, Z. Lu and S.R. RahimiEsfarjani (2017) "Exploring a Variable‐Resolution Approach for Simulating Regional Climate in the Rocky Mountain Region Using the VR‐CESM" J. Geophys. Res. Atmospheres, Volume 122, Issue 20, pp. 10,93910,965, 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., Volume 57, pp. 137154, doi: 10.1175/JAMCD170089.1.
 (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 variableresolution CESM to microphysics and horizontal resolution" J. Adv. Model Earth Sys.
 (DOI) Zarzycki, C.M. and P.A. Ullrich (2017) "Assessing sensitivities in algorithmic detection of tropical cyclones in climate data" Geophys. Res. Lett., Volume 44, Issue 2, pp. 11411149, doi: 10.1002/2016GL071606.
 (DOI) Huang, X. and P.A. Ullrich (2017) "The changing character of twentyfirst century precipitation over the western United States in the variableresolution CESM" J. Clim., Volume 30, Number 18, pp. 7555–7575, doi: 10.1175/JCLID160673.1.
 (DOI) Rhoades, A.M., P.A. Ullrich and C.M. Zarzycki (2017) "Projecting 21st century snowpack trends in western USA mountains using variableresolution CESM" Clim. Dyn., Volume 50, Issue 1–2, pp. 261–288, doi: 10.1007/s0038201736060.
 (DOI) Ullrich, P.A. and C.M. Zarzycki (2017) "TempestExtremes v1.0: A framework for scaleinsensitive pointwise feature tracking on unstructured grids" Geosci. Model. Dev., Volume 10, pp. 10691090, doi: 10.5194/gmd1010692017.
 (DOI) Lauritzen, P.H., M.A. Taylor, J. Overfelt, P.A. Ullrich, R.D. Nair, S. Goldhaber and R. Kelly (2017) "CAMSECSLAM: Consistent coupling of a conservative semiLagrangian finitevolume method with spectralelement dynamics" Mon. Weather Rev., Volume 145, Number 3, pp. 833855, doi: 10.1175/MWRD160258.1.
 (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 highorder cubedsphere shallow water model" Mon. Weather Rev., Volume 144, Number 12, pp. 46414666, doi: 10.1175/MWRD160197.1.
 (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., Volume 8, Issue 2, pp. 976990, doi: 10.1002/2016MS000671.
 (DOI)
Huang, X. and P.A. Ullrich (2016) "Irrigation impacts on California's climate with the variableresolution CESM" J. Adv. Earth System Model., Volume 8, Issue 3, pp. 11511163, doi: 10.1002/2016MS000656.
 (DOI) Hotta, D., K. Eugenia and P.A. Ullrich (2016) "A semiimplicit modification to Lorenz Ncycle scheme and its application for integration of meteorological equations" Mon. Weather Rev. Volume 144, Number 6, pp. 22152233, doi: 10.1175/MWRD150330.1.
 (DOI) Guerra, J.E. and P.A. Ullrich (2016) "A highorder staggered finiteelement vertical discretization for nonhydrostatic atmospheric models" Geosci. Model. Dev. Volume 9, pp. 20072029, doi:10.5194/gmd920072016.
 (Link  DOI) Huang, X., A.M. Rhoades, P.A. Ullrich and C.M. Zarzycki (2016) "An evaluation of the variable resolutionCESM for modeling California’s climate" J. Adv. Earth System Model. Volume 8, Issue 1, pp. 345369, doi: 10.1002/2015MS000559.
 (Link  DOI) Ullrich, P.A., D. Devendran and H. Johansen (2016) "Arbitraryorder conservative and consistent remapping and a theory of linear maps, Part 2" Mon. Weather Rev. Volume 144, Issue 4, pp. 15291549, doi: 10.1175/MWRD150301.1.
 (Link  DOI) Rhoades, A.M., X. Huang, P.A. Ullrich and C.M. Zarzycki (2016) "Characterizing Sierra Nevada snowpack using variableresolution CESM" J. Appl. Meteor. Clim. Volume 55, Number 1, pp. 173196, doi: 10.1175/JAMCD150156.1.
 (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., Volume 142, Issue 697, pp. 1672–1684, doi: 10.1002/qj.2761.
 (DOI) McCorquodale, P., P.A. Ullrich, H. Johansen and P. Colella. (2015) "An adaptive multiblock highorder finitevolume method for solving the shallowwater equations on the sphere" Comm. Appl. Math. Comp. Sci. 102, pp. 121162, 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 betaplane 3D channel models." Quart. J. Roy. Meteor. Soc. Volume 141, Issue 693, pp. 2972–2988, doi: 10.1002/qj.2583.
 (Link  DOI)
Ullrich, P.A. and M.A. Taylor (2015) "Arbitraryorder conservative and consistent remapping and a theory of linear maps, part 1" Mon. Weather Rev., Volume 143, pp. 2419–2440, doi: 10.1175/MWRD1400343.1.
 (Link  DOI)
Ullrich, P.A. and J.E. Guerra (2015) "Exploring the effects of a highorder vertical coordinate in a nonhydrostatic global model." Procedia Comput. Sci., Volume 51, pp. 20762085, doi: 10.1016/j.procs.2015.05.475.
 (DOI)
Ullrich, P.A. (2014) "A global finiteelement shallowwater model supporting continuous and discontinuous elements" Geosci. Model Dev., Volume 7, pp. 51415182, doi: 10.5194/gmd730172014.
 (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 resolutionaware numerical viscosity" Geosci. Model Dev., Volume 7, pp. 28032816, doi: 10.5194/gmd728032014.
 (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, Volume 27, pp. 54815503, doi:10.1175/JCLID1400004.1.
 (Link  DOI)
Ullrich, P.A., P.H. Lauritzen and C. Jablonowski (2014)
"A highorder fully explicit fluxform semiLagrangian shallowwater model."
Int. J. Numer. Meth. Fluids., Volume 75, Issue 2, pp. 103133, 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 twodimensional linear transport on the sphere: results from a collection of stateoftheart schemes." Geosci. Model Dev., Volume 7, pp. 105145, doi:10.5194/gmd71052014.
 (Link  DOI)
Ullrich, P.A., T. Melvin, C. Jablonowski and A. Staniforth (2014)
"A proposed baroclinic wave test case for deep and shallowatmosphere dynamical cores."
Quart. J. Royal Meteor. Soc., Volume 140, Issue 682, pp. 15901602, 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. Volume 140, Issue 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., Volume 140, Issue 682, pp. 1426–1440, doi: 10.1002/qj.2226.
 (Link  DOI)
Ullrich, P.A. and M.R. Norman (2014)
"The FluxForm SemiLagrangian Spectral Element (FFSLSE) method for tracer transport"
Quart. J. Roy. Meteor. Soc., Volume 140, Issue 680, pp. 10691085, doi:10.1002/qj.2184.
 (Link  DOI)
Ullrich, P.A., P.H. Lauritzen and C. Jablonowski (2013)
"Some considerations for highorder `incremental remap'based transport schemes: edges, reconstructions and area integration."
Int. J. Num. Methods Fluids, Volume 71, Issue 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 highorder finitevolume methods."
J. Comp. Phys., Volume 231, Issue 15, pp. 5078–5108, doi: 10.1016/j.jcp.2012.04.024.
 (Link  DOI)
Ullrich, P.A. and C. Jablonowski (2011)
"Operatorsplit RungeKuttaRosenbrock methods for nonhydrostatic atmospheric models",
Mon. Wea. Rev., Volume 140, Number 4, pp. 12571284, doi: 10.1175/MWRD1005073.1.
 (Link  DOI)
Ullrich, P.A. and C. Jablonowski (2011)
"An analysis of 1D finitevolume methods for geophysical problems on refined grids",
J. Comp. Phys., Volume 230, Issue 3, pp. 706725, doi: 10.1016/j.jcp.2010.10.014.
 (Link  DOI)
Ullrich, P.A., C. Jablonowski and B. van Leer (2010)
"Highorder finitevolume models for the shallowwater equations on the sphere",
J. Comp. Phys., Vol. 229, Issue 17, pp. 61046134, doi: 10.1016/j.jcp.2010.04.044.
 (Link  DOI)
Lauritzen, P.H., R.D. Nair and P.A. Ullrich (2010)
"A conservative semiLagrangian multitracer transport scheme (CSLAM) on the cubedsphere grid",
J. Comp. Phys. Vol. 229, Issue 5, pp. 14011424, 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 latitudelongitude and cubedsphere grids",
Mon. Wea. Rev. Vol. 137, No. 6, pp. 17211741.

 (Link) Ullrich, P.A., G. Jost, B.A. Lelbach and H. Johansen (2016) "ExascaleReady Programming Models for Climate" Paper for Advancing Xcutting Ideas for Computational Climate Science.
 (Link) Ullrich, P.A. (2015) "Recent Advances in the Development of NextGeneration 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 HighOrder Vertical Coordinate in a NonHydrostatic 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 13, 2015.

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

 (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 CrossCutting Ideas for Computational Climate Science: Workshop Report", Eds. E.G. Ng and K. Evans.
 (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.

 (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. (2011)
Atmospheric Modeling with HighOrder FiniteVolume Methods,
(PhD Thesis) University of Michigan.
 (Link)
Ullrich, P.A. (2007)
Exact and Perturbed FriedmannLemaitre Cosmologies,
(Master's Thesis) University of Waterloo.

 (Link)
Ullrich, P.A., J.E. Guerra, M. Pinheiro and J. Fong (2015) "Tempest: Tools for Addressing the Needs of NextGeneration 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 HighOrder FiniteVolume Dynamical Core"
 (Link)
Ullrich, P.A. and C. Jablonowski (2010)
"Highorder finitevolume 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"

 Ullrich, P.A. (2018) "California’s Drought of the Future (20422047)" Invited presentation at the Chinese Academy of Sciences Institute for Atmospheric Physics. August 1, 2018.
 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 UseInspired Metrics" Poster presentation at the 22nd Annual CESM workshop (CVCWG), Boulder, Colorado. June 1922, 2017.
 Rhoades, A., Ullrich, P.A., Johansen, H., Xu, Z., Zarzycki, C.M., and W.D. Collins (2017) "A VariableResolution 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 1922.
 M. Wang, Ullrich, P.A., Millstein, D., and Collier, C. (2017) "The future of wind energy in California: Future projections in VariableResolution 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 nextgeneration variableresolution global climate model" 2nd place poster presentation at the 2017 The Sierra Fund "Reclaiming the Sierra" Conference, Sacramento, California. May 89, 2017.
 Ullrich, P.A. et al. (2017) "Hyperion: Understanding Hydroclimate Data with UseInspired Metrics" Invited presentation to the Water Utility Climate Alliance. April 24, 2017.
 Ullrich, P.A. (2017) "Tempest: Software Tools for Addressing the Needs of NextGeneration 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 (IN13D08), San Francisco, California. December 15, 2016.
 M. Wang, Ullrich, P.A. (2016) "Marine Air Penetration: The Effect of Synopticscale Change on Regional Climate" Poster presentation at AGU Fall Meeting (A13E0314), 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 (A44F01), 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 HighResolution VariableResolution CESM Simulations" Poster presentation at the AGU Fall Meeting (A21F0132), San Francisco, California. December 1216, 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 nextgeneration variableresolution global climate model" Poster presentation at the 2016 Mountain Climate (MtnClim) Conference, Leavenworth, Washington. October 1721, 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 Xcutting 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.
 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 NextGeneration Climate and Weather Prediction Algorithms at NonHydrostatic Scales" Presentation at the European Geophyscial Union, Vienna, Austria. Abstract EGU20169160. April 19, 2016.
 Rhoades, A., C. Zarzycki and P.A. Ullrich (2016) "Understanding hydroclimatic changes in western USA mountain ranges using the variableresolution CESM (VRCESM) 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 SemiArid 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 NextGeneration Climate Models" Poster presentation at the American Geophysical Union, San Francisco, California. Abstract NG23A1778. December 1418, 2015.
 Rhoades, A., X. Huang, C. Zarzycki and P.A. Ullrich (2015) "Projecting 21st Century Snowpack Trends in the Western United States using VariableResolution CESM" Presentation at the American Geophysical Union, San Francisco, California. Abstract A53G07. December 1418, 2015.
 Guerra, J.E. and P.A. Ullrich (2015) "Efficient Computation of Atmospheric Flows with Tempest: Development of NextGeneration Climate and Weather Prediction Algorithms at NonHydrostatic Scales" Poster presentation at the American Geophysical Union, San Francisco, California. Abstract NG23A1779. December 1418, 2015.
 Huang, X., A. Rhoades, P.A. Ullrich and C. Zarzycki (2015) "Highresolution regional climate model evaluation using variableresolution CESM over California" Poster presentation at the American Geophysical Union, San Francisco, California. Abstract A51J0198. December 1418, 2015.
 Rhoades, A., C.M. Zarzycki and P.A. Ullrich (2015) "Understanding 21st Century Hydroclimatic Trends in Western USA Mountain Ranges using VariableResolution 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 NextGeneration 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 NextGeneration 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 NextGeneration Variable Resolution Model" Poster presentation at the California Climate Change Symposium 2015, Sacramento, California. August 24  25, 2015.
 Ullrich, P.A. (2015) "Towards Robust MultiScale 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 HighOrder Vertical Coordinate in a NonHydrostatic 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 13, 2015.
 Guerra, J.E. and P.A. Ullrich (2015) "ArbitraryOrder Staggered FiniteElement 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 HighOrder 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 VariableResolution 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) "VariableResolution 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 orderofaccuracy 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 HighOrder 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 MultiScale 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 HighOrder Local Discretization Methods" Presentation at ICOSAHOM 2014, Salt Lake City, Utah. June 25, 2014.
 Ullrich, P.A. and J.E. Guerra (2014) "ArbitraryOrder Hybrid FiniteElement Methods for Geophysical Flows" Presentation at Partial Differential Equations on the Sphere 2014, Boulder, Colorado. April 10, 2014.
 Ullrich, P.A. (2014) "Towards Robust MultiScale 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) "ArbitraryOrder Hybrid FiniteElement 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 MultiScale Atmospheric Models" Invited presentation at the HighPerformance Computational Science with Structured Meshes and Particles (HPCSSMP), 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) "HighOrder 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 2223, 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 1720, 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 SemiLagrangian Methods on the CubedSphere." 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 37, 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 RegionalGlobal 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 RegionalGlobal 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 highorder modeling of the global atmosphere."
Presentation at American Geophysical Union Fall Meeting 2011, San Francisco, CA, USA, December 59, 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) "HighOrder Methods and Nonhydrostatic Designs on QuasiUniform and VariableResolution Grids: Tackling the Numerical Challenges for FutureGeneration GCMs." Invited presentation at the GlobaltoRegional Climate Simulation Workshop, Santa Fe, NM, USA, August 35, 2011.
 Jablonowski, C. and P. A. Ullrich (2011) "A HighOrder FiniteVolume 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 1014, 2011.
 Ullrich, P.A. and Jablonowski, C. (2011) "MCore: A HighOrder FiniteVolume Dynamical Core."
Presentation at the 16th Annual CESM Workshop, Breckenridge, CO, USA, June 2023, 2011.
 Ullrich, P.A. (2011) "HighOrder FiniteVolume 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 HighOrder FiniteVolume Technique for Nonhydrostatic Dynamic Cores on (Adaptive) CubedSphere Grids."
Presentation at the NCAS meeting, Boulder, CO, USA, March 79 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)
"Highorder finitevolume methods for geophysical flow problems"
Presentation at American Geophysical Union Fall Meeting 2010, San Francisco, CA, USA, December 1317, 2010.
 Ullrich, P.A. (2010)
"Highorder finitevolume 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 highorder finitevolume schemes for simulating atmospheric flows"
Presentation at the Workshop on Solutions to Partial Differential Equations on the Sphere, Potsdam, Germany, August 2227, 2010.
 Ullrich, P.A. (2010)
"Highorder finitevolume 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 FiniteVolume schemes: Highorder 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)
"Highorder finitevolume methods for geophysical flow problems"
Poster presentation at the Michigan Geophysical Union, Ann Arbor, MI, USA, March 26, 2010.
 Ullrich, P.A. (2009)
"RiemannSolver Based ShallowWater FV Models on the Sphere"
Poster presentation at the Engineering Graduate Symposium, Ann Arbor, MI, USA, November 13, 2009.
 Ullrich, P.A. (2009)
"RiemannSolver Based ShallowWater FV Models on the Sphere"
Invited Talk at Field's Workshop on Dynamics in Environmental and Geophysical Flows, Waterloo, Ontario, Canada, July 2729, 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 2730, 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 1519, 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.

