A Teleconnection between Forced Great Plains Snow Cover and European Winter Climate
A Teleconnection between Forced Great Plains Snow Cover and European Winter Climate
复制标题
强制大平原积雪与欧洲冬季气候之间的遥相关
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
D. Leathers
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文献类型：
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作者：
N. Klingaman;B. Hanson;D. Leathers
西伯利亚积雪异常通过北大西洋涛动（NAO）影响欧亚冬季气候。北美积雪与NAO之间是否存在远相关还不太确定，特别是对于有限的区域积雪异常。利用群落大气模型第2版（CAM2）的三个集合，作者检查了美国北部大平原和欧亚大陆西部冬季持续的强迫积雪之间的遥相关。其中一个集合使模型能够自由地确定全球积雪，而另外两个集合则以内布拉斯加州为中心形成了72厘米的积雪。在强迫集合中，“早季”（“晚季”）模拟在11月1日（1月1日）开始了积雪。额外的积雪使冰岛（亚速尔群岛）的海平面压力和位势高度降低（升高），欧洲北部和西部（东部和东南部）的温度升高（降低），这表明……
Abstract Anomalies in Siberian snow cover have been shown to affect Eurasian winter climate through the North Atlantic Oscillation (NAO). The existence of a teleconnection between North American snow cover and the NAO is far less certain, particularly for limited, regional snow cover anomalies. Using three ensembles of the Community Atmosphere Model, version 2 (CAM2), the authors examined teleconnections between persistent, forced snow cover in the northern Great Plains of the United States and western Eurasian winters. One ensemble allowed the model to freely determine global snow cover, while the other two forced a 72-cm snowpack centered over Nebraska. Of the forced ensembles, the “early-season” (“late season”) simulations initiated the snowpack on 1 November (1 January). The additional snow cover generated lower (higher) sea level pressures and geopotential heights over Iceland (the Azores) and warmer (cooler) temperatures over northern and western (eastern and southeastern) Europe, which suggests the...