“神舟七号”飞船主着陆场区强对流天气的气候背景和环流条件

J4 ›› 2009, Vol. 27 ›› Issue (3): 232-238.

“神舟七号”飞船主着陆场区强对流天气的气候背景和环流条件

王红军^１，刘培宁^２，丁德华^１，刘文菁^３，潘维玉^４

1.西安卫星测控中心，陕西　渭南　714000；2.江苏省苏州市气象局，江苏　苏州　215000；
3.江苏省气象局，江苏　南京　210000；4.南京信息工程大学，江苏　南京　210044

收稿日期:2009-05-28 修回日期:2009-07-20 出版日期:2010-09-30 发布日期:2009-09-30
作者简介:王红军（１９７１－），男，陕西渭南市人，工程师，在读硕士，从事中短期预报和强对流天气研究．Ｅ－ｍａｉｌ：ｗａｎｇｚｃ９＠１２６．ｃｏｍ
基金资助:
921工程项目基金资助

C limate Background and C irculation Characteristic of Severe ConvectiveW eather Process over theM ain Landing Field of Shenzhou No.7Space Ship

WANG Gong-Jun¹, LIU Pei-Ning², DING De-Hua¹, LIU Wen-Jing³, BO Wei-Yu⁴

(1.Xi’an Satellite ControlCenter,Weinan714000, China;2. SuzhouMeteorologicalBureau of Jiangsu Province, Suzhou215000, China;3. Jiangsu ProvincialMeteorologicalBureau, Nanjing210000, China;
4. Nanjing University ofInformation Science& Technology, Nanjing210044,China)

Received:2009-05-28 Revised:2009-07-20 Online:2010-09-30 Published:2009-09-30

摘要/Abstract

摘要：

利用NCEP再分析资料,对2008年8~9月内蒙主着陆场区强对流天气频发和降水异常偏多现象,研究其形成的气候背景和大尺度环流特征。结果表明:前期赤道西太平洋海表温度异常偏低、欧亚和青藏高原积雪异常偏深是其前期气候背景。极涡中心8月位于东半球和9月位于西半球,是场区前期降水偏多和后期气温偏高的原因之一。欧亚经向环流的偏强,有利于南北方冷暖空气的交汇。副热带高压偏强偏西及活跃的印缅槽为场区提供了充沛的水汽和强对流天气必要的扰动能量。中低层偏南风和偏北风在淮河以北地区汇合与维持,是场区降水异常和强对流偏多的主要原因。

关键词: 气候背景, 欧亚及青藏高原积雪, 赤道太平洋海表温度, 大气环流特征

Abstract:

Aiming at the frequent strong convectiverweather and exceptionalmore precipitation over InnerMongolmain landing field of Shenzhou No. 7 Space Ship in August and September2008, the climate background and the large-scale circulation featurewere analyzed based on NCEP 1°×1°reanalysis data. Result indicated that the sea surface temperature (SST) overWestern Tropical Pacific from July 2007 to February 2008 was lower and snow coveroverEurasia andQinghai-TibetPlateauwas bigger in the precedingwinter and spring. The polar vortex centre was located at theWesternHemisphere in August and EasternHemisphere in September, which was themain reason why there was exceptionaly more precipitation in the preceding stage and higher temperature in the succeeding stage over themain landing field. The strongmeridional circulation overEurasiawas beneficial to the cold and warm air convergence.The stronger and westSubtropicHigh and the active India-Burma trough provided the abundantwatervapor and fluctuation energy for convective activity over themain landing area. The southerly and northerlywind atmid-low levels encountered and maintained over the north ofHuaihe River, whichwas themain reason formore precipitation andmore convective activity over themain landing field in August and September 2008.

Key words: snow cover, SST, circulation characteristic, climate background, Eurasia and Qinghai-TibetPlateau

中图分类号:

P461⁺. 2

王红军, 刘培宁, 丁德华, 刘文菁, 潘维玉. “神舟七号”飞船主着陆场区强对流天气的气候背景和环流条件[J]. J4, 2009, 27(3): 232-238.

WANG Gong-Jun, LIU Pei-Ning, DING De-Hua, LIU Wen-Jing, BO Wei-Yu. C limate Background and C irculation Characteristic of Severe ConvectiveW eather Process over theM ain Landing Field of Shenzhou No.7Space Ship[J]. J4, 2009, 27(3): 232-238.

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