Physics
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3520710g&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 20, CiteID L20710
Physics
3
Global Change: Regional Climate Change, Hydrology: Extreme Events, Atmospheric Processes: Regional Modeling, Atmospheric Processes: Precipitation (1854)
Scientific paper
We analyze regional climate model (RCM) simulations of daily, spatially distributed extreme precipitation events, using co-operative network observations and output from 10-year RCM simulations of present and future-scenario climates. We examine an Upper Mississippi River Basin region during October-March for daily amounts that exceed the 99.95th percentile and that occur simultaneously at several observation sites or model grid points. For the observations and each simulation, nearly all such extreme regional events occur when a slow moving, cut-off-low system develops over the Rockies and Great Plains and steadily pumps moisture into the Upper Mississippi region from the Gulf of Mexico. The threshold for the extreme events increases in the future scenario by an amount similar to the increase in saturation specific humidity. The results suggest robust circulation behavior for such extremes in the face of climate change.
Arritt Raymond W.
Gutowski William Joseph
Patton Jason C.
Schwedler Benjamin R. J.
Takle Eugene S.
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