GC067
Hydroclimate and Extremes in the Western United States under a Changing Climate
Session ID#: 250261
Session Description:
The western United States is subject to adverse impacts of hydroclimate extremes such as droughts, wildfires, floods, heat waves and compounding extremes. Anthropogenic forcing can alter temperature, precipitation and humidity, which impact vapor pressure deficit, evapotranspiration, precipitation phases, snowpack etc., thereby shaping the risk of the above hydroclimatic processes and extremes. It is thus crucial to advance the fundamental knowledge of drivers of hydroclimatic processes and extremes under the present and future climates. This session focuses on recent advancements in understanding hydroclimate and related extremes/hazards in the western United States under the present and future climates in terms of physical processes, observations, numerical modeling, and impact analysis. Abstracts that examine droughts, floods, snowpack, wildfires, atmosphere-land interactions and the roles of temperature, precipitation and humidity in driving hydroclimatic processes and extremes are particularly welcome.
Co-Sponsor(s):
Index Terms:
1637 Regional climate change [GLOBAL CHANGE]
1833 Hydroclimatology [HYDROLOGY]
3354 Precipitation [ATMOSPHERIC PROCESSES]
Primary Convener: Wei Zhang, Utah State University, Plants, Soils and Climate, Logan, United States
Conveners: Dr. Cenlin He, NSF National Center for Atmospheric Research, Research Applications Laboratory, Boulder, United States, Park Williams, University of California, Los Angeles, Department of Geography, Los Angeles, United States and Daniel Swain, University of California, Los Angeles, Los Angeles, United States
Student/Early Career Convener: Cody Ratterman, Utah State University, Plants, Soils and Climate Department, Logan, UT, United States
The escalating control of weather and climate extremes on wildfire outcomes in the western US (Invited) (1849614)
John T Abatzoglou, University of California Merced, Sierra Nevada Research Institute, Merced, United States, Moji Sadegh, Boise State University, Boise, United States, Park Williams, University of California, Los Angeles, Department of Geography, Los Angeles, United States, Alison Cullen, University of Washington, Seattle, United States, Emily L Williams, University of California Merced, Geography, Merced, CA, United States, Crystal Kolden, University of California Merced, Merced, United States, Matthew William Jones, University of East Anglia, Norwich, United Kingdom, Jennifer Balch, University of Colorado Boulder, CIRES, ESIIL, Boulder, United States, Marco Turco, University of Murcia, Murcia, Spain and Alex Hall, University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, United States
Strong Modulation of NPO on U.S. Winter Precipitation and Atmospheric Rivers (1859084)
Jihun Ryu, Utah State University, Plants, Soils, and Climate, Logan, UT, United States, Bradley Vernon, Utah State University, Department of Plants, Soils, and Climate, Logan, UT, United States and Wei Zhang, Utah State University, Plants, Soils and Climate, Logan, United States
Using machine learning to evaluate climatic controls on wildfire severity across the western United States (1886887)
Tanner Johnson, University of Texas at Austin, Austin, TX, United States, Dr. Danielle E Touma, PhD, University of Texas at Austin, Institute for Geophysics, Austin, United States and Joel P L P Johnson, University of Texas at Austin, Department of Earth and Planetary Sciences, Jackson School of Geosciences, Austin, United States
Projected increase in ENSO-induced US winter extreme hydroclimate events in large ensemble simulation (Invited) (1891612)
Jin-Sil Hong, University of Texas at Austin, Institute for Geophysics, Austin, United States, Dongmin Kim, UM-CIMAS/NOAA-AOML, Miami, United States, Hosmay Lopez, NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, United States, Sang-Ki Lee, University of Miami, Cooperative Institute for Marine and Atmospheric Studies, Miami, United States, Andrew Mercer, Mississippi State University, Department of Geosciences, Mississippi State, United States and Nathaniel C Johnson, NOAA, Geophysical Fluid Dynamics Laboratory, Princeton, United States
Characterizing the Influence of Heatwave Events in the Western United States Among Undisturbed Watershed Systems (1893125)
Nicholas Januario, California State University, Long Beach, Department of Earth Science, Long Beach, United States, Benjamin Hagedorn, California State University, Long Beach, Long Beach, CA, United States, Laurie Huning, California State University, Long Beach, Civil Engineering and Construction Engineering Management, Long Beach, United States, Alan Rhoades, Lawrence Berkeley National Laboratory, Berkeley, CA, United States, Daniel McEvoy, Desert Research Institute Reno, Reno, NV, United States and Edgar Villasano, California State University Long Beach, Long Beach, United States
Preceding Wet Years Historically Buffered La Niña Droughts in the U.S. Southwest, but Will Not in the Future (1897770)
Yelin Jiang1, Jason E Smerdon1, Richard Seager1, Benjamin Cook2 and Mingfang Ting3, (1)Lamont-Doherty Earth Observatory, Palisades, United States, (2)NASA-GISS, New York, United States, (3)Columbia Climate School, New York, United States
Assessing Hydroclimatic Extremes in Southern California (1981–2024): Impacts on Vegetation Health, and Responses Across Land Cover Types (1904877)
Kristofer Gonzalez, California State University Los Angeles, Los Angeles, CA, United States, Alireza Farahmand, California State University Los Angeles, Department of Geography, Geology, and Environment, Los Angeles, United States and Jingjing Li, California State University-Los Angeles, Los Angeles, United States
Benchmarking precipitation datasets for post-wildfire hydrologic events. (1911733)
Trevor Partridge, USGS, Water Resources Mission Area, Hanover, United States, Brian A Ebel, U.S. Geological Survey, Earth Systems Processes Division, Water Resources Mission Area, Burlington, United States, Se Jong Cho, U.S. Geological Survey, Water Mission Area - Earth System Processes Division, Reston, United States, Zachary Johnson, US Geological Survey, WA-WSC, Tacoma, WA, United States and Sheila F Murphy, USGS Water Mission Area, Boulder, United States
Multi-year impacts of rain and snowmelt on baseflow in the Upper Colorado River basin: Insights from panel regression (1925014)
Jory S Hecht, U.S. Geological Survey, Integrated Modeling and Prediction Division, Water Resources Mission Area, Northborough, United States, David Rey, USGS Observing Systems Division, Hydrologic Remote Sensing Branch, Golden, United States, Michelle A Walvoord, U.S. Geological Survey, Earth System Processes Division, Water Resources Mission Area, Lakewood, United States, Christopher T Green, U.S. Geological Survey, Integrated Modeling Prediction Division, Moffett Field, California, United States and Martha A Scholl, U.S. Geological Survey, Earth System Processes Division, Reston, United States
Global warming and the Pacific Decadal Oscillation drive seasonally varying increases in extreme fire weather over the southwestern US (1931937)
Jiale Lou1, Youngji Joh2, Thomas L Delworth3 and Andrew Thorne Wittenberg3, (1)Princeton University, Atmospheric and Oceanic Sciences Program, Princeton, NJ, United States, (2)NOAA Princeton, Princeton, United States, (3)NOAA/GFDL, Princeton, United States
Compound meteorological and agricultural droughts in California’s changing climate (1942754)
Dr. Sushree Swagatika Swain1, Lu Su2, Morgan C Levy3 and Daniel R Cayan2, (1)Scripps Institution of Oceanography, La Jolla, CA, United States, (2)University of California San Diego, Scripps Institution of Oceanography, La Jolla, United States, (3)University of California San Diego, Scripps Institution of Oceanography, and School of Global Policy and Strategy, La Jolla, CA, United States
Mid-Tropospheric Circulation and Compound Weather Extremes in Western North America (1959408)
Amanda Laverty1, Xiaoyu Bai1, Siiri Bigalke2, Paul C Loikith3 and Deepti Singh1, (1)Washington State University, School of the Environment, Vancouver, United States, (2)Portland State University, Geography, Portland, OR, United States, (3)Portland State University, Geography, Portland, United States
A Snow-Fire Bridge Mechanism for the California Wildfire in January 2025 (1959448)
Shizuo Liu, Duke University, Durham, NC, United States and Shineng Hu, Duke University, Division of Earth and Climate Sciences, Nicholas School of the Environment, Durham, NC, United States
Upper Colorado River Snowpack Potentially More Resilient than Climate Models Suggest (1965092)
Ankur Dixit, Cornell University, Ithaca, NY, United States, Keith N Musselman, University of Colorado Boulder, Department of Geography, Boulder, United States, Nans Addor, Fathom, Bristol, United Kingdom, Sydney Carr, University of Colorado Boulder, Boulder, CO, USA, Boulder, United States, Ethan D Gutmann, NSF National Center for Atmospheric Research, Hydrometeorological Applications Program, Research Applications Laboratory, Boulder, United States, Lei Huang, University of California Los Angeles, Los Angeles, United States, Andrew James Newman, NSF National Center for Atmospheric Research, Boulder, United States, Stefan Rahimi, University of Wyoming, Atmospheric Science, Laramie, United States, Julie A Vano, Aspen Global Change Institute, Basalt, United States and Flavio Lehner, Cornell University, Department of Earth and Atmospheric Sciences, Ithaca, United States
Precipitation uncertainty and planning challenges in the Great Salt Lake Basin (1965095)
Husile Bai, Vanderbilt University, Department of Earth and Environmental Sciences, Nashville, United States, Courtenay Strong, University of Utah, Department of Atmospheric Sciences, Salt Lake City, United States, Sydney Smith, University of Utah, David Eccles School of Business, Salt Lake City, United States, Savanna Wolvin, University of Utah, Department of Atmospheric Sciences, Salt Lake City, UT, United States and Maribeth Kniffin, US Bureau of Reclamation, Technical Service Center, Denver, United States
Strong Modulation of the Pacific Meridional Mode on Precipitation Phasesin the Upper Colorado River Basin (1965505)
Sherly Shelton1, Hadia Akbar2, Pamela Claure Gutierrez3, Wei Zhang1, Snehadeep Ballav1, Lydia Conger4, Jake Utley4 and Gage Farley4, (1)Utah State University, Department of Plants, Soils and Climate, Logan, United States, (2)Utah State University, Civil and Environmental Engineering, Logan, UT, United States, (3)Utah State University, Utah Water Research Laboratory, Logan, UT, United States, (4)Utah State University, Logan, United States
The Dry Arizona Has Been Experiencing a Significant Decline in Water Availability due to Climate Change (1996797)
Aniket Gupta1, Ali Behrangi1, Yuan Qiu2 and Guo-Yue Niu1, (1)University of Arizona, Department of Hydrology and Atmospheric Sciences, Tucson, United States, (2)Arizona State University, School of Sustainability, Tempe, AZ, United States
Extreme rainfall to intensify at much greater rate than extreme precipitation over Western U.S. (2002007)
Jesse Norris1, Stefan Rahimi2, Lei Huang3, Chad William Thackeray4, Mark D Zelinka5 and Alex Hall4, (1)University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, CA, United States, (2)University of Wyoming, Atmospheric Science, Laramie, United States, (3)University of California Los Angeles, Los Angeles, United States, (4)University of California Los Angeles, Atmospheric and Oceanic Sciences, Los Angeles, United States, (5)Lawrence Livermore National Laboratory, Livermore, United States
