Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075807 |
Thermodynamic and Dynamic Causes of Pluvial Conditions During the Last Glacial Maximum in Western North America | |
Morrill, Carrie1,2; Lowry, Daniel P.2,3; Hoell, Andrew4 | |
2018-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:1页码:335-345 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; New Zealand |
英文摘要 | During the last glacial period, precipitation minus evaporation increased across the currently arid western United States. These pluvial conditions have been commonly explained for decades by a southward deflection of the jet stream by the Laurentide Ice Sheet. Here analysis of state-of-the-art coupled climate models shows that effects of the Laurentide Ice Sheet on the mean circulation were more important than storm track changes in generating wet conditions. Namely, strong cooling by the ice sheet significantly reduced humidity over land, increasing moisture advection in the westerlies due to steepened humidity gradients. Additionally, the removal of moisture from the atmosphere by mass divergence associated with the subtropical high was diminished at the Last Glacial Maximum compared to present. These same dynamic and thermodynamic factors, working in the opposite direction, are projected to cause regional drying in western North America under increased greenhouse gas concentrations, indicating continuity from past to future in the mechanisms altering hydroclimate. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423431800038 |
WOS关键词 | LATE QUATERNARY LACUSTRINE ; ERA-INTERIM REANALYSIS ; LATE-PLEISTOCENE ; UNITED-STATES ; GREAT-BASIN ; PALEOCLIMATIC SIGNIFICANCE ; MOISTURE TRANSPORT ; HYDROLOGICAL CYCLE ; BONNEVILLE BASIN ; CLOSED-BASIN |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27650 |
专题 | 气候变化 |
作者单位 | 1.Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 2.NOAA, Natl Ctr Environm Informat, Boulder, CO 80305 USA; 3.Victoria Univ Wellington, Wellington, New Zealand; 4.NOAA, Phys Sci Div, Earth Syst Res Lab, Boulder, CO USA |
推荐引用方式 GB/T 7714 | Morrill, Carrie,Lowry, Daniel P.,Hoell, Andrew. Thermodynamic and Dynamic Causes of Pluvial Conditions During the Last Glacial Maximum in Western North America[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(1):335-345. |
APA | Morrill, Carrie,Lowry, Daniel P.,&Hoell, Andrew.(2018).Thermodynamic and Dynamic Causes of Pluvial Conditions During the Last Glacial Maximum in Western North America.GEOPHYSICAL RESEARCH LETTERS,45(1),335-345. |
MLA | Morrill, Carrie,et al."Thermodynamic and Dynamic Causes of Pluvial Conditions During the Last Glacial Maximum in Western North America".GEOPHYSICAL RESEARCH LETTERS 45.1(2018):335-345. |
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