DOI: 10.1002/2016GL071244
论文题名: Abrupt reorganization of North Pacific and western North American climate during the last deglaciation
作者: Lora J.M. ; Mitchell J.L. ; Tripati A.E.
刊名: Geophysical Research Letters
ISSN: 0094-8383
EISSN: 1944-8114
出版年: 2016
卷: 43, 期: 22 起始页码: 11796
结束页码: 11804
语种: 英语
英文关键词: deglaciation
; hydroclimate proxies
; Last Glacial Maximum
; moisture transport
; paleoclimate
; western North America
Scopus关键词: Budget control
; Deglaciations
; hydroclimate proxies
; Last Glacial Maximum
; Moisture transport
; Paleoclimates
; western North America
; Moisture
英文摘要: Dramatic hydroclimate shifts occurred in western North America during the last deglaciation, but the timing and mechanisms driving these changes are uncertain and debated, and previous modeling has largely relied on linear interpolations between equilibrium snapshot simulations. Using a published transient climate simulation and a range of proxy records, we analyze the region's climate evolution in order to identify the mechanisms governing hydroclimate shifts. A rapid loss of ice around 14,000 years ago causes an abrupt reorganization of the circulation, which precipitates drying and moistening of southwestern and northwestern North America, respectively. The atmospheric circulation transitions between two states on a timescale of decades to centuries, during which time the westerly jet shifts north by about 7°. In contrast to previous studies, we find that changes in the water budget of western North America prior to this event are not attributable to variations in the position of the jet, but rather to the intensity of moisture transport into the continent. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85003972581&doi=10.1002%2f2016GL071244&partnerID=40&md5=2dfc261c75daa0b18af428488344f8a6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9346
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Lora J.M.,Mitchell J.L.,Tripati A.E.. Abrupt reorganization of North Pacific and western North American climate during the last deglaciation[J]. Geophysical Research Letters,2016-01-01,43(22).