Out of the tropics: the Pacific, Great Basin lakes, and late Pleistocene water cycle in the western United States
Science
By: Mitchell Lyle, Linda Heusser, Christina Ravelo, Masanobu Yamamoto, John Barron, Noah S. Diffenbaugh, Timothy Herbert, and Dyke Andreasen
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Abstract
The water cycle in the western U.S. changed dramatically over glacial cycles. In the last 20,000 years, higher precipitation caused desert lakes to form which have since dried out. Higher glacial precipitation is hypothesized to result from a southward shift of Pacific winter storm tracks. We compared Pacific Ocean data to lake levels from the interior west and found that Great Basin lake high stands are older than coastal wet periods at the same latitude. Westerly storms were not the source of high precipitation. Instead, air masses from the tropical Pacific were transported northward, bringing more precipitation into the Great Basin when coastal California was still dry. The changing climate during the deglaciation altered precipitation source regions and strongly affected the regional water cycle.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Out of the tropics: the Pacific, Great Basin lakes, and late Pleistocene water cycle in the western United States |
| Series title | Science |
| DOI | 10.1126/science.1218390 |
| Volume | 337 |
| Year Published | 2012 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Contributing office(s) | Volcano Science Center |
| Description | 5 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Science |
| First page | 1629 |
| Last page | 1633 |
| Country | United States |
| Google Analytic Metrics | Metrics page |