| Increased Tibetan Plateau Snow Depth：An Indicator of the Connection between Enhanced Winter NAO and Late-Spring Tropospheric Cooling over East Asia |
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| 作者姓名： | XIN Xiaoge ZHOU Tianjun YU Rucong |
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| 作者单位： | 中国科学院大气物理研究所LASG实验室;中国气象局国家气候中心气候系统模式室,, |
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| 摘 要： |
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| 关 键 词： | 积雪深度 青藏高原 对流层 审计署 东亚 连接 冷却 指示器 |
| 收稿时间： | 5 November 2007 |
| 修稿时间： | 9/4/2009 12:00:00 AM |
Increased Tibetan Plateau snow depth: An indicator of the connection between enhanced winter NAO and late-spring tropospheric cooling over East Asia |
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| XIN Xiaoge,ZHOU Tianjun,YU Rucong.Increased Tibetan Plateau snow depth: An indicator of the connection between enhanced winter NAO and late-spring tropospheric cooling over East Asia[J].Advances in Atmospheric Sciences,2010,27(4):788-794. |
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| Authors: | XIN Xiaoge ZHOU Tianjun and YU Rucong |
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| Institution: | State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, Division of Climate System Modeling, National Climate Center, China Meteorological Administration, Beijing 100081,State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing 100081 |
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| Abstract: | The authors present evidence to suggest that variations in the snow depth over the
Tibetan Plateau (TP) are connected with changes of North Atlantic
Oscillation (NAO) in winter (JFM). During the positive phase of NAO, the
Asian subtropical westerly jet intensifies and the India-Myanmar trough
deepens. Both of these processes enhance ascending motion over the TP. The
intensified upward motion, together with strengthened southerlies upstream
of the India-Myanmar trough, favors stronger snowfall over the TP, which is
associated with East Asian tropospheric cooling in the subsequent late
spring (April--May). Hence, the decadal increase of winter snow depth over
the TP after the late 1970s is proposed to be an indicator of the connection
between the enhanced winter NAO and late spring tropospheric cooling over
East Asia. |
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| Keywords: | Tibetan Plateau snow depth North Atlantic Oscillation (NAO) tropospheric cooling |
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