主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2018, Vol. 34 ›› Issue (5): 100-107.doi: 10.3969/j.issn.1673-503X.2018.05.013

• 论文 • 上一篇    下一篇

亚洲热带夏季风建立时风场相似度的分析

张东凌1, 赵艳玲2,3, 张铭3   

  1. 1. 中国科学院大气物理研究所, 北京 100029;
    2. 中国人民解放军31010部队, 北京 100094;
    3. 解放军理工大学气象海洋学院/大气环流与短期气候预测实验室, 江苏 南京 211101
  • 收稿日期:2017-01-11 修回日期:2017-09-22 出版日期:2018-10-31 发布日期:2018-10-31
  • 通讯作者: 张铭,E-mail:zhangm1945@163.com E-mail:zhangm1945@163.com
  • 作者简介:张东凌,男,1974年生,助理研究员,主要从事气候学研究,E-mail:zdl@mail.iap.ac.cn。
  • 基金资助:
    国家重点基础研究发展项目“973”项目“西北太平洋海洋多尺度变化过程、机理及可预报性”(2013CB956203)资助。

Analyses of wind similarity in onset of Asia tropic summer monsoon

ZHANG Dong-ling1, ZHAO Yan-ling2,3, ZHANG Ming3   

  1. 1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;
    2. Unit 61741, PLA, Beijing 100094, China;
    3. Laboratory of Atmospheric Circulation and Short-range Climate Forecast, College of Meteorology and Oceanography, P. L. A. University of Science and Technology, Nanjing 211101, China
  • Received:2017-01-11 Revised:2017-09-22 Online:2018-10-31 Published:2018-10-31

摘要: 基于1968—1997年美国国家大气研究中心/美国国家环境预报中心(National Center for Atmospheric Research/National Centers for Environmental Prediction,NCAR/NCEP)共30 a平均的全球各标准等压面上经纬网格距为2.5°×2.5°的逐日气候风场资料,对南海夏季风和南亚夏季风建立期间气候逐日风场的相似度进行了分析。结果表明:风场相似度能较好地反映亚洲热带夏季风的建立,在南海夏季风和南亚夏季风建立期间的季风区,对流层低层风场相似度等值线的水平梯度较大,可视为“相似度锋区”,季风沿其法线方向推进。在南海夏季风和南亚夏季风建立过程中,对流层低层大气环流的变化较中层剧烈。在对流层低层,气候状态的南海夏季风最早在西太平洋暖池洋面建立,数日后则已覆盖整个南海,南海和南亚夏季风建立是低层大气环流的突变过程;相应南亚夏季风则最早在赤道东印度洋和赤道西印度洋建立,进而覆盖整个南亚次大陆,其突变性不及南海夏季风。亚洲热带夏季风建立时除季风区及附近外,在全球个别地区大气环流的调整也相当剧烈,甚至发生突变。

关键词: 南海夏季风, 南亚夏季风, 风场, 相似度, 大气环流

Abstract: In this paper,the similarity of day-to-day wind during the period of onset of Asia tropic summer monsoon (ATSM) was analyzed using 30-year averaged daily wind data on standard isobaric surface with the spatial resolution of 2.5°×2.5° during 1968-1997 derived from NCAR/NCEP reanalysis dataset.The results show that the similarity can reflect the onset of the ATSM better.Specially,in the lower troposphere,the level grads of contour line of wind similarity are very large and regarded as "frontal zone of the similarity".The change of atmospheric circulation is larger relative to that in the middle troposphere when South China Sea monsoon (SCSM) and South Asia summer monsoon (SAM) set up.The monsoon moves along the normal of the grads.Climatic SCSM sets up early in most cases in western Pacific warm pool and then covers the whole South China Sea after several days,which is caused by saltation of lower atmospheric circulation.Climatic SAM sets up early in most cases in tropical Eastern and Western Indian Ocean and then covers the whole South Asian Subcontinent and its saltation is weaker than that of the SCSM.Besides monsoon area and its neighboring districts,dramatic adjustment and even abrupt changes in the atmospheric circulation occur in some areas in global when the ATSM starts to set up.

Key words: South China Sea summer monsoon, South Asia summer monsoon, Wind, Similarity, Atmospheric circulation

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