DOI: 10.1002/grl.50424
论文题名: Regional patterns and proximal causes of the recent snowpack decline in the Rocky Mountains, U.S.
作者: Pederson G.T. ; Betancourt J.L. ; McCabe G.J.
刊名: Geophysical Research Letters
ISSN: 0094-9096
EISSN: 1944-8827
出版年: 2013
卷: 40, 期: 9 起始页码: 1811
结束页码: 1816
语种: 英语
英文关键词: climate change
; paleoclimate
; snow
; snow model
; tree rings
; water resources
Scopus关键词: Anthropogenic warming
; Interannual variation
; Pacific decadal variabilities
; Paleoclimates
; Regional pattern
; Rocky Mountains
; Snow models
; Tree rings
; Climate change
; Landforms
; Reinforcement
; Water resources
; Snow
; anthropogenic effect
; seasonality
; snow cover
; snowpack
; synchrony
; temporal analysis
; twentieth century
; warming
; Rocky Mountains
; United States
英文摘要: We used a first-order, monthly snow model and observations to disentangle seasonal influences on 20th century,regional snowpack anomalies in the Rocky Mountains of western North America, where interannual variations in cool-season (November-March) temperatures are broadly synchronous, but precipitation is typically antiphased north to south and uncorrelated with temperature. Over the previous eight centuries, regional snowpack variability exhibits strong, decadally persistent north-south (N-S) antiphasing of snowpack anomalies. Contrary to the normal regional antiphasing, two intervals of spatially synchronized snow deficits were identified. Snow deficits shown during the 1930s were synchronized north-south by low cool-season precipitation, with spring warming (February-March) since the 1980s driving the majority of the recent synchronous snow declines, especially across the low to middle elevations. Spring warming strongly influenced low snowpacks in the north after 1958, but not in the south until after 1980. The post-1980, synchronous snow decline reduced snow cover at low to middle elevations by ~20% and partly explains earlier and reduced streamflow and both longer and more active fire seasons. Climatologies of Rocky Mountain snowpack are shown to be seasonally and regionally complex, with Pacific decadal variability positively reinforcing the anthropogenic warming trend. Key Points Post-1980s west-wide snowpack declines are driven by spring (Feb-Mar) warmingLow to middle elevation spring snow cover declined by 20%Recent declines reflect a positive reinforcement of anthropogenic warming ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879094175&doi=10.1002%2fgrl.50424&partnerID=40&md5=faee8e779836c3b554f52d188c49cbfa
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6360
Appears in Collections: 气候减缓与适应
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作者单位: U.S. Geological Survey, Northern Rocky Mountain Science Center, 2727 University Way, Bozeman, MT 59715, United States
Recommended Citation:
Pederson G.T.,Betancourt J.L.,McCabe G.J.. Regional patterns and proximal causes of the recent snowpack decline in the Rocky Mountains, U.S.[J]. Geophysical Research Letters,2013-01-01,40(9).