| DOI: | 10.1175/JCLI-D-12-00528.1
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| Scopus记录号: | 2-s2.0-84881260394
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| 论文题名: | Controls of global snow under a changed climate |
| 作者: | Kapnick S.B.; Delworth T.L.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2013
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| 卷: | 26, 期:15 | | 起始页码: | 5537
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| 结束页码: | 5562
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| 语种: | 英语
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| Scopus关键词: | Atmospheric carbon dioxide
; Geophysical fluid dynamics laboratories
; Global-mean temperature
; High-resolution models
; Mountainous regions
; Multivariate models
; Statistical forecasting
; Total precipitation
; Atmospheric chemistry
; Atmospheric composition
; Atmospheric radiation
; Carbon dioxide
; Climate change
; Snow
; Statistics
; Wind
; Climate models
; climate change
; climate forcing
; climate modeling
; forecasting method
; radiative forcing
; snow
; statistical analysis
; wind
; Andes
; Canada
; Himalayas
; Yukon Territory
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| 英文摘要: | This study assesses the ability of a newly developed high-resolution coupled model from the Geophysical Fluid Dynamics Laboratory to simulate the cold-season hydroclimate in the present climate and examines its response to climate change forcing. Output is assessed from a 280-yr control simulation that is based on 1990 atmospheric composition and an idealized 140-yr future simulation in which atmospheric carbon dioxide increases at 1% yr-1 until doubling in year 70 and then remains constant. When compared with a lowresolution model, the high-resolution model is found to better represent the geographic distribution of snow variables in the present climate. In response to idealized radiative forcing changes, both models produce similar global-scale responses in which global-mean temperature and total precipitation increase while snowfall decreases. Zonally, snowfall tends to decrease in the low to midlatitudes and increase in the mid-to high latitudes. At the regional scale, the high-and low-resolution models sometimes diverge in the sign of projected snowfall changes; the high-resolution model exhibits future increases in a few select high-altitude regions, notably the northwestern Himalaya region and small regions in the Andes and southwestern Yukon, Canada. Despite such local signals, there is an almost universal reduction in snowfall as a percent of total precipitation in both models. By using a simple multivariate model, temperature is shown to drive these trends by decreasing snowfall almost everywhere while precipitation increases snowfall in the high altitudes and midto high latitudes. Mountainous regions of snowfall increases in the high-resolution model exhibit a unique dominance of the positive contribution from precipitation over temperature. © 2013 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/51755
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Princeton University, NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
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| Recommended Citation: | |
Kapnick S.B.,Delworth T.L.. Controls of global snow under a changed climate[J]. Journal of Climate,2013-01-01,26(15)
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