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  • CN 62-1070/P
  • ISSN 1000-694X
  • 双月刊 创刊于1981年
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天气与气候

1951—2009年东亚副热带夏季风北边缘位置的地域特征

  • 李栋梁1 ,
  • 邵鹏程1 ,
  • 2 ,
  • 王 慧1
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  • 1.南京信息工程大学 大气科学学院/气象灾害教育部重点实验室, 江苏 南京 210044;
    2.中国气象局 国家气候中心, 北京 100081

收稿日期: 2012-06-29

  修回日期: 2012-10-22

  网络出版日期: 2012-10-22

The Position Variations of the North Boundary of East Asian Subtropical Summer Monsoon in 1951-2009

  • LI Dong-liang1 ,
  • SHAO Peng-cheng1 ,
  • 2 ,
  • WANG Hui1
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  • 1.College of Atmospheric Sciences/ key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science & Technology, Nanjing 210044, China;
    2.National Climate Centre, China Meteorological Administration, Beijing 100081,China

Received date: 2012-06-29

  Revised date: 2012-10-22

  Online published: 2012-10-22

摘要

利用1951—2009年中国662个气象台站逐日降水资料和NCEP/NCAR逐日再分析资料,分析了东亚副热带夏季风北边缘地理位置的年际、年代际变化以及夏季风影响北边缘的时间演变特征。结果表明:基于过程透雨量定义的夏季风北边缘能很好地反映边缘带降水特点,东亚副热带夏季风北边缘带大致呈东北-西南走向,在110°E处,北边缘带南界大致位于36°N,北界大致位于41°N。边缘带宽度与其南界纬度具有很好的负相关,且有逐年变宽的趋势。边缘带存在显著的准3年和9年的周期特征。夏季风平均在6月28日开始影响北边缘带,9月21日南撤离开北边缘带。110°E是夏季风边缘带中南风分量最大的经度,与偏南年相比,偏北年夏季风影响边缘带时间开始早,结束迟。

本文引用格式

李栋梁1 , 邵鹏程1 , 2 , 王 慧1 . 1951—2009年东亚副热带夏季风北边缘位置的地域特征[J]. 中国沙漠, 2013 , 33(5) : 1511 -1519 . DOI: 10.7522/j.issn.1000-694X.2013.00217

Abstract

Based on the daily precipitation data from 662 meteorological stations in China and NCEP/NCAR daily reanalysis data during 1951-2009, the inter-annual, inter-decadal variations of the north boundary of the East Asian subtropical summer monsoon and the time in which the East Asian subtropical summer monsoon arrive at or leave off the boundary were analyzed. The results show that the north boundary belt of East Asian aubtropical summer monsoon is roughly in northeast-southwest direction, the southern edge of the north boundary belt is located roughly 36°N at 110°E, the northern edge of the north boundary belt is located approximately 41°N. There is a good negative correlation between the boundary belt width and the southern edge of the boundary belt, the boundary belt width has a increase trend year by year. The north boundary has significant 2 a, 3 a, 9 a periodic oscillations. The summer monsoon begins to affect the north boundary belt on July 28, and on September 21 to leave. It is at 110°E that the north boundary belt has the maximum south wind component. Compared with years in which the north boundary is relatively south, the date of the East Asian subtropical summer monsoon arriving at the boundary is earlier and leaving later in years in which the north boundary is relatively north.

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