高原气象

高原气象 >

2015 , Vol. 34 >Issue 3: 611 - 620

DOI: https://doi.org/10.7522/j.issn.1000-0534.2014.00039

论文

中国持续性暴雨特征及青藏高原热源的影响

  • 施晓晖 ,
  • 温敏
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  • 中国气象科学研究院, 北京 100081;2. 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, 南京 210044

收稿日期: 2013-10-16

  网络出版日期: 2015-06-28

基金资助

国家重点基础研究发展规划(973)项目(2012CB417205); 国家自然科学基金项目(41275050, 41130960)

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Distribution and Variation of Persistent Heavy Rainfall Events in China and Possible Impacts of Heating Source Anomaly over Qinghai-Xizang Plateau

  • SHI Xiaohui ,
  • WEN Min
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  • Chinese Academy of Meteorological Sciences, Beijing 100081, China;2. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China

Received date: 2013-10-16

  Online published: 2015-06-28

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摘要

利用气象站点逐日降水资料研究了中国1961-2011年5-10月持续性暴雨事件发生次数的空间分布、 时间变化及其季节演变特征, 分析了持续性暴雨事件异常的环流形势, 并讨论了青藏高原大气热源的可能影响.结果表明, 中国5-10月持续性暴雨事件的发生地主要集中在中国东部地区, 逐年发生次数具有明显的年际波动和年代际变化, 且其季节内的变化与东亚夏季风的季节演变进程联系密切.通过对比和相关分析还表明, 青藏高原前期的大气热源偏弱(强), 将导致东亚夏季风偏弱(强), 西南水汽输送亦偏弱(强), 水汽聚集在中国南(北)方地区, 最终使得夏季中国的持续性暴雨事件偏多(少), 初步揭示了青藏高原大气热源对中国持续性暴雨事件的可能影响.

关键词： 持续性暴雨; 时空分布与变化; 青藏高原; 热源异常

本文引用格式

施晓晖 , 温敏 . 中国持续性暴雨特征及青藏高原热源的影响[J]. 高原气象, 2015 , 34(3) : 611 -620 . DOI: 10.7522/j.issn.1000-0534.2014.00039

Abstract

Using observational daily rainfall data, the spatial distribution, temporal variation and seasonal evolution of persistent heavy rainfall (PHR) events in Chinese mainland from May to October during the period of 19612011 were studied. We also analyzed the atmospheric circulation for the abnormal PHR events and possible impacts of atmospheric heating source over the Qinghai-Xizang Plateau on them. The results showed that the PHR events in China mostly occurred in eastern of China and the annual occurring times of PHR events had obvious inter-annual fluctuation and inter-decadal change. The intra-seasonal variation of PHR events was closely correlated with the seasonal evolution of East Asian summer monsoon (EASM). It was found that by comparison analysis and correlation analysis, the weak (strong) heating source over TP in winter and spring would lead to weak (strong) EASM and weak (strong) southwest water vapor transportation, so massive water vapor assembled in south (north) of China. Finally, these would cause the more (less) PHR events in Chinese mainland in summer. It preliminarily reveals the possible influence of atmospheric heating source over the Tibetan Plateau on PHR events in Chinese mainland.

Key words： Persistent heavy rai; Spatial-temporal dis; The Qinghai-Xizang P; Heating source anoma

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