Physics
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3706701s&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 6, CiteID L06701
Physics
1
Global Change: Abrupt/Rapid Climate Change (4901, 8408), Hydrology: Drought, Hydrology: Hydroclimatology, Hydrology: Limnology (0458, 4239, 4942), Hydrology: Water Supply
Scientific paper
Rapid hydroclimatic shifts repeatedly generated centuries to millennia of extensive aridity across the headwaters of three of North America's largest river systems during the Holocene. Evidence of past lake-level changes at the headwaters of the Snake-Columbia, Missouri-Mississippi, and Green-Colorado Rivers in the Rocky Mountains shows that aridity as extensive and likely as severe as the CE 1930s Dust Bowl developed within centuries or less at ca. 9 ka (thousand years before CE 1950), and persisted across large areas of the watersheds until ca. 3 ka. Regional water levels also shifted abruptly at >11.3 and 1.8-1.2 ka. The record of low water levels during the mid-Holocene on the Continental Divide links similar evidence from the Great Basin and the Midwestern U.S., and shows that extensive aridity was the Holocene norm even though few GCMs have simulated such a pattern.
Minckley Thomas A.
Pribyl Paul
Shinker Jacqueline J.
Shuman Bryan
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