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DOI | 10.1029/2019JD030279 |
The Influence of Summer Deep Soil Temperature on Early Winter Snow Conditions in Eurasia in the NCEP CFSv2 Simulation | |
Shukla, Ravi P.1; Huang, Bohua1,2; Dirmeyer, Paul A.1,2; Kinter, James L.1,2 | |
2019-08-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:16页码:9062-9077 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The National Centers for Environmental Prediction (NCEP) Climate Forecast System version 2 (CFSv2) has a large cold bias in the model's deep soil temperature during summer. This study explores the potential triggering effect of that bias on excessive Eurasian snow cover in early winter. Snow cover appears erroneously early in the fall, especially in western Eurasia, in long simulations with CFSv2. The seasonal transition may be too early because the model land surface temperature (LST) reaches its freezing point earlier than observed, so that new snow cannot melt. This process initiates snow-albedo feedback too early. The early cooling of LST is partially influenced by a seasonal resurfacing of the cold bias in the deep soil layer. From winter to early spring, a cold bias prevails in LST and upper soil temperature as snow cover remains. During this season, the temperature in the deep soil is generally warmer than in the upper soil and has relatively little bias. From spring to summer, the cold bias in the upper soil becomes smaller as it warms up in response to solar heating. On the other hand, the deep soil temperature has a noticeably smaller seasonal change than observed, resulting in a severe cold bias during summer. As the solar radiation declines quickly in early fall, the cold deep soil temperature causes additional cooling in the upper soil layer and helps to bring LST to the freezing point early in the western Eurasia, which leads to enhanced bias in the snow properties. |
英文关键词 | subsurface soil temperature NCEP CFSv2 Eurasia snow-albedo feedback deep soil temperature seasonal transition |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000490762800011 |
WOS关键词 | FORECAST SYSTEM ; COVER VARIABILITY ; WATER EQUIVALENT ; MONSOON RAINFALL ; SEA-ICE ; CLIMATE ; PREDICTABILITY ; PREDICTION ; CMIP5 ; IMPACT |
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/186147 |
专题 | 气候变化 |
作者单位 | 1.George Mason Univ, Ctr Ocean Land Atmosphere Studies, Fairfax, VA 22030 USA; 2.George Mason Univ, Dept Atmospher Ocean & Earth Sci, Fairfax, VA 22030 USA |
推荐引用方式 GB/T 7714 | Shukla, Ravi P.,Huang, Bohua,Dirmeyer, Paul A.,et al. The Influence of Summer Deep Soil Temperature on Early Winter Snow Conditions in Eurasia in the NCEP CFSv2 Simulation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(16):9062-9077. |
APA | Shukla, Ravi P.,Huang, Bohua,Dirmeyer, Paul A.,&Kinter, James L..(2019).The Influence of Summer Deep Soil Temperature on Early Winter Snow Conditions in Eurasia in the NCEP CFSv2 Simulation.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(16),9062-9077. |
MLA | Shukla, Ravi P.,et al."The Influence of Summer Deep Soil Temperature on Early Winter Snow Conditions in Eurasia in the NCEP CFSv2 Simulation".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.16(2019):9062-9077. |
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