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气象:2008,34(9):104-111
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山西省夏季旱涝的大气环流异常特征
(1.北京大学物理学院,北京 100871;2. 山西省临汾市气象局;3.南京信息工程大学大气科学学院;4.山西省临汾市气象局)
Anomalous Characteristics of General Circulation in Drought/Flood Years of Shanxi Province
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投稿时间:2008-07-07    修订日期:2008-07-29
中文摘要: 利用山西省61个台站44年(1961—2004年)夏季降水资料和NCAR/ NCEP再分析资料,对山西 省夏季旱涝的大气环流异常特征进行了合成分析。结果表明:旱(涝)年春、夏季欧亚中高 纬度地区500hPa 位势高度距平场呈现出“正(负)-负(正)-正(负)”的分布特征, 中高纬度地区以纬(经)向环流为主,冷空气活动明显偏弱(强),与此同时在我国东部地 区对流层低层表现出明显的偏北(南)风距平,不(有)利于南方暖湿水汽向北的输送。
中文关键词: 旱涝  大气环流  合成分析
Abstract:By using the 44a (1961-2004) monthly precipitation data at 61 meteorological sta tions in Shanxi Province and NCAR/NCEP reanalysis data, the unusual characterist ics of general circulation in drought and flood years of Shanxi are investigated . The results show that in the year of drought (flood), a positive (negative) n egative (positive) positive (negative) distribution of the 500hPa geo potentia l height anomaly is presented in the mid high latitudes over Europe and Asia i n spring and summer. In the area of mid high latitudes, a zonal circulation ( meridional circulation) is displayed primarily, and evidently weaker (stronger) activity of the cold air is also displayed. At the same time a distinctly nor therly (southerly) wind anomaly is presented in the wind field of 850hPa over ea stern area of China.
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基金项目:“中国气候系统的协同观测与预测研究”项目(批准号: GYHY2007060 05)和江苏省气象灾害重点实验室基金项目(编号:KJS 0304)联合资助
引用文本:
王智娟,周顺武,杨双艳,史海平,李义石,2008.山西省夏季旱涝的大气环流异常特征[J].气象,34(9):104-111.
Wang Zhijuan,Zhou Shunwu,Yang Shuangyan,Shi Haiping,Li Yishi,2008.Anomalous Characteristics of General Circulation in Drought/Flood Years of Shanxi Province[J].Meteor Mon,34(9):104-111.