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DOI | 10.1175/JCLI-D-16-0612.1 |
Influences of Temperature and Precipitation on Historical and Future Snowpack Variability over the Northern Hemisphere in the Second Generation Canadian Earth System Model | |
Sospedra-Alfonso, Reinel; Merryfield, William J. | |
2017-06-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | This study examines the changing roles of temperature and precipitation on snowpack variability in the Northern Hemisphere for Second Generation Canadian Earth System Model (CanESM2) historical (1850-2005) and future (2006-2100) climate simulations. The strength of the linear relationship between monthly snow water equivalent (SWE) in January-April and precipitation P or temperature T predictors is found to be a sigmoidal function of the mean temperature over the snow season up to the indicated month. For P predictors, the strength of this relationship increases for colder snow seasons, whereas for T predictors it increases for warmer snow seasons. These behaviors are largely explained by the daily temperature percentiles below freezing during the snow accumulation period. It is found that there is a threshold temperature (-5 +/- 1 degrees C, depending on month in the snow season and largely independent of emission scenario), representing a crossover point below which snow seasons are sufficiently cold that P is the primary driver of snowpack amount and above which T is the primary driver. This isotherm allows one to delineate the snow-climate regions and elevation zones in which snow-cover amounts are more vulnerable to a warming climate. As climate projections indicate that seasonal isotherms shift northward and toward higher elevations, regions where snowpack amount is mainly driven by precipitation recede, whereas temperature-sensitive snow-covered areas extend to higher latitudes and/or elevations, with resulting impacts on ecosystems and society. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402379600018 |
WOS关键词 | WESTERN UNITED-STATES ; CLIMATE ; COVER ; TRENDS ; SENSITIVITY ; SWITZERLAND |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/20898 |
专题 | 气候变化 |
作者单位 | Univ Victoria, Canadian Ctr Climate Modelling & Anal, Victoria, BC, Canada |
推荐引用方式 GB/T 7714 | Sospedra-Alfonso, Reinel,Merryfield, William J.. Influences of Temperature and Precipitation on Historical and Future Snowpack Variability over the Northern Hemisphere in the Second Generation Canadian Earth System Model[J]. JOURNAL OF CLIMATE,2017,30(12). |
APA | Sospedra-Alfonso, Reinel,&Merryfield, William J..(2017).Influences of Temperature and Precipitation on Historical and Future Snowpack Variability over the Northern Hemisphere in the Second Generation Canadian Earth System Model.JOURNAL OF CLIMATE,30(12). |
MLA | Sospedra-Alfonso, Reinel,et al."Influences of Temperature and Precipitation on Historical and Future Snowpack Variability over the Northern Hemisphere in the Second Generation Canadian Earth System Model".JOURNAL OF CLIMATE 30.12(2017). |
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