| 2011年南海夏季风爆发过程及其与长江中下游梅雨的联系 |
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| 引用本文： | 朱伟军,潘佳,周兵,王燕娜.2011年南海夏季风爆发过程及其与长江中下游梅雨的联系[J].大气科学学报,2016,39(1):37-45. |
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| 作者姓名： | 朱伟军 潘佳 周兵 王燕娜 |
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| 作者单位： | 南京信息工程大学气象灾害预报预警与评估协同创新中心, 江苏南京 210044;气象灾害教育部重点实验室(南京信息工程大学), 江苏南京 210044;南京信息工程大学气象灾害预报预警与评估协同创新中心, 江苏南京 210044;气象灾害教育部重点实验室(南京信息工程大学), 江苏南京 210044;国家气候中心, 北京 100081;南京信息工程大学气象灾害预报预警与评估协同创新中心, 江苏南京 210044;气象灾害教育部重点实验室(南京信息工程大学), 江苏南京 210044 |
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| 基金项目： | 国家自然科学基金资助项目(41575070;41075070);公益性行业(气象)科研专项(GYHY201306028);江苏高校优势学科建设工程资助项目(PAPD) |
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| 摘 要： | 采用NCEP/NCAR再分析资料、FY2E-TBB及台站降水资料,对2011年南海夏季风爆发前后的环流特征进行分析。结果表明:2011年强对流活动由孟加拉湾扩展到南海地区,同时伴随着南亚高压移至中南半岛北部,西太平洋副热带高压向东撤出南海地区,南海夏季风于5月第4候(第28候)爆发;季风爆发后,印度-孟加拉湾季风槽形成,南海地区低空开始盛行西南气流,并伴有对流降水的发展和温、湿等要素的突变。随着季风活动的推进,我国雨带北抬,长江中下游一带进入梅雨期,出现降水大值区。通过分析发现长江中下游梅雨与南海夏季风均受副热带高压影响,且两者的强度为显著的负相关关系,梅雨开始时间与南海夏季风爆发时间呈显著的正相关关系。2011年南海夏季风偏弱,爆发时间偏早,长江中下游梅雨强度偏强,入梅时间异常偏早。
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| 关 键 词： | 南海夏季风 长江中下游 梅雨 对流活动 环流形势 季风槽 |
| 收稿时间： | 2014/3/18 0:00:00 |
| 修稿时间： | 2014/5/2 0:00:00 |
Onset process of South China Sea summer monsoon in 2011 and its relationship with Meiyu over the middle and lower reaches of the Yangtze River |
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| ZHU Weijun,PAN Ji,ZHOU Bing and WANG Yanna.Onset process of South China Sea summer monsoon in 2011 and its relationship with Meiyu over the middle and lower reaches of the Yangtze River[J].大气科学学报,2016,39(1):37-45. |
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| Authors: | ZHU Weijun PAN Ji ZHOU Bing and WANG Yanna |
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| Institution: | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;Key Laboratory of Meteorological Disaster(NUIST), Ministry of Education, Nanjing 210044, China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;Key Laboratory of Meteorological Disaster(NUIST), Ministry of Education, Nanjing 210044, China;National Climate Center, Beijing 100081, China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China;Key Laboratory of Meteorological Disaster(NUIST), Ministry of Education, Nanjing 210044, China |
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| Abstract: | Based on the NCEP/NCAR reanalysis data,the FY2E-TBB data and the precipitation observed by meteorological stations,the general circulation and precipitation before and after South China Sea(SCS) summer monsoon onset of 2011 are analyzed.Results show that the convective activity first appears in the Bengal Bay,then extends to SCS in 2011.Meanwhile,South Asia high moves to the northern Indo-China peninsula and the western Pacific subtropical high withdraws eastward from SCS,and SCS summer monsoon breaks out in the fourth pentad of May(the 28th pentad of 2011).After the monsoon onset,the India-Bengal Bay summer monsoon trough forms,and the southwest flow prevails in lower troposphere over most of SCS,coupling with abrupt changes of both the convective rainfall and the circulation over SCS.With the progress of monsoon activity,the rainbelt moves northward and the great precipitation appears over the middle and lower reaches of the Yangtze River where the rainy season begins.It is found that both the SCS summer monsoon and the Meiyu over the middle and lower reaches of the Yangtze River are influenced by the subtropical high.There is an obvious negative correlation between intensity of Meiyu over the middle and lower reaches of the Yangtze River and that of SCS summer monsoon,but there is a remarkable positive correlation between onset time of the Meiyu and that of SCS summer monsoon.SCS summer monsoon is weaker and its onset time is earlier,while Meiyu precipitation over the middle and lower reaches of the Yangtze River is heavier and its onset time is earlier in 2011. |
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| Keywords: | South China Sea summer monsoon the middle and lower reaches of the Yangtze River Meiyu convective activity circulation situation summer monsoon trough |
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