Paul Aaron Ullrich


Portrait of  Paul Aaron Ullrich
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Paul Ullrich is a lead of climate resilience efforts at LLNL and a professor of regional and global climate modeling at the University of California, Davis. He currently co-leads the HyperFACETS project and is principal investigator for the Program for Climate Model Diagnosis and Intercomparison. His work focuses on development, analysis and evaluation of regional climate information. He works closely with stakeholders across the United States to understand their needs for climate data, and to understand how regional climate and extreme weather are being affected by climate change.

Ph.D. Atmospheric and Space Science, University of Michigan, Ann Arbor, Michigan

M.Math. Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada

B.Math. Applied Mathematics and Computer Science, University of Waterloo, Waterloo, Ontario, Canada

For a full list, see: Google Scholar | Climate and Global Change @ UC Davis

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.


2023 PLS SPOT Award
2020 Excellence for contributions to the US Department of Energy Regional and Global Modeling and Analysis Program
2014 University of California Davis Hellman Fellowship