GC13H:
Current and Future Hydroclimate Changes II

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Session ID#: 15790

Session Description:
The future world will experience a different hydroclimate, and externally forced changes are already detectable in various hydrological observations.  However, observational uncertainty, the sparsity and length of observational coverage, model errors and biases, and gaps in our theoretical understanding make the detection of hydroclimate changes  significantly more challenging than the detection of temperature changes.  Moreover, despite their importance for climate change adaptation, projected changes in hydroclimate variables are still uncertain at all spatial scales, particularly over land.  

This session emphasizes the physical mechanisms that dictate hydroclimate responses to external forcing.  We welcome submissions on all aspects of hydroclimate change, particularly those that use a combination of theory, modeling, and/or observations to understand the underlying processes. We encourage contributions that identify observed changes or projected shifts (location, intensity, seasonality) in precipitation or other hydroclimate variables (snow cover, evapotranspiration…) and/or  benefit from multivariate analysis, uncertainty regional analysis, uncertainty quantification, or innovative metrics.

Primary Convener:  Kate Marvel, NASA Goddard Institute for Space Studies, New York, NY, United States; Columbia University of New York, Center for Climate Systems Research, New York, NY, United States
Conveners:  Celine Bonfils, Lawrence Livermore National Laboratory, Livermore, CA, United States and Debbie Polson, University of Edinburgh, Edinburgh, United Kingdom
Chairs:  Kate Marvel, NASA Goddard Institute for Space Studies, New York, NY, United States; Columbia University of New York, Center for Climate Systems Research, New York, NY, United States and Celine Bonfils, Lawrence Livermore National Laboratory, Livermore, CA, United States
OSPA Liaison:  Celine Bonfils, Lawrence Livermore National Laboratory, Livermore, CA, United States
Index Terms:

1616 Climate variability [GLOBAL CHANGE]
1626 Global climate models [GLOBAL CHANGE]
1655 Water cycles [GLOBAL CHANGE]

Abstracts Submitted to this Session:

Drivers of precipitation change: An energetic understanding (177299)
Thomas Richardson, University of Leeds, Leeds, LS2, United Kingdom, Piers Forster, University of Leeds, School of Earth and Environment, Leeds, United Kingdom and Timothy Andrews, Met Office Hadley Centre, Exeter, United Kingdom
Understanding Decreases in Land Relative Humidity with Global Warming: Conceptual Model and GCM Simulations (128155)
Michael Byrne, ETH Zurich, Zurich, Switzerland and Paul A O'Gorman, Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, Cambridge, United States
Observed heavy precipitation increase confirms theory and early model (156810)
Erich M Fischer and Reto Knutti, ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
The future intensification of hourly precipitation extremes (159240)
Andreas F Prein1, Roy Rasmussen2, Kyoko Ikeda3, Changhai Liu4, Martyn P Clark5 and Greg J Holland1, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)University Corporation for Atmospheric Research, Boulder, CO, United States, (3)National Center for Atmospheric Research, RAL, Boulder, CO, United States, (4)NCAR/RAL, Boulder, CO, United States, (5)National Center for Atmospheric Research, Boulder, United States
Characterizing the Spatial Contiguity of Extreme Precipitation over the US in the Recent Past (Invited) (125673)
Dr. Danielle E Touma, PhD1, Daniel L Swain1 and Noah S Diffenbaugh2, (1)Stanford University, Earth System Science, Stanford, CA, United States, (2)Stanford University, Earth System Science and Woods Institute for the Environment, Stanford, United States
Wetter subtropics in a warmer world (Invited) (164679)
Natalie Burls, George Mason University, Atmospheric, Oceanic and Earth Sciences, Fairfax, VA, United States and Alexey V Fedorov, Yale University, New Haven, CT, United States
Precipitation Stable Isotopes Indicate Hydroclimatic Change Since 1965 (151139)
Annie Putman, University of Utah, Salt Lake City, UT, United States and Gabriel J Bowen, University of Utah, Geology & Geophysics, Salt Lake City, United States
Measuring Changes in E-P with Isotope Ratios in Water Vapor (124865)
Adriana Raudzens Bailey, University of Washington Seattle Campus, Seattle, WA, United States; Joint Institute for the Study of the Atmosphere and Ocean, Seattle, WA, United States, Robert Wood, University of Washington, Department of Atmospheric Sciences, Seattle, United States, Peter N Blossey, University of Washington, Department of Atmospheric and Climate Science, Seattle, United States, Jesse M Nusbaumer, National Center for Atmospheric Research, Boulder, United States, David Noone, Oregon State University, Corvallis, OR, United States and Hansi Alice Singh, University of Washington Seattle Campus, Seattle, United States

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