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基于TRMM资料的高原涡与西南涡引发强降水的对比研究

蒋璐君 李国平 王兴涛

蒋璐君, 李国平, 王兴涛. 基于TRMM资料的高原涡与西南涡引发强降水的对比研究[J]. 大气科学, 2015, 39(2): 249-259. doi: 10.3878/j.issn.1006-9895.1407.13260
引用本文: 蒋璐君, 李国平, 王兴涛. 基于TRMM资料的高原涡与西南涡引发强降水的对比研究[J]. 大气科学, 2015, 39(2): 249-259. doi: 10.3878/j.issn.1006-9895.1407.13260
JIANG Lujun, LI Guoping, WANG Xingtao. Comparative Study Based on TRMM Data of the Heavy Rainfall Caused by the Tibetan Plateau Vortex and the Southwest Vortex[J]. Chinese Journal of Atmospheric Sciences, 2015, 39(2): 249-259. doi: 10.3878/j.issn.1006-9895.1407.13260
Citation: JIANG Lujun, LI Guoping, WANG Xingtao. Comparative Study Based on TRMM Data of the Heavy Rainfall Caused by the Tibetan Plateau Vortex and the Southwest Vortex[J]. Chinese Journal of Atmospheric Sciences, 2015, 39(2): 249-259. doi: 10.3878/j.issn.1006-9895.1407.13260

基于TRMM资料的高原涡与西南涡引发强降水的对比研究

doi: 10.3878/j.issn.1006-9895.1407.13260
基金项目: 国家自然科学基金项目91337215、41175045, 国家重点基础研究发展计划(973计划)项目2012CB417202, 公益性行业(气象)科研专项GYHY201206042

Comparative Study Based on TRMM Data of the Heavy Rainfall Caused by the Tibetan Plateau Vortex and the Southwest Vortex

  • 摘要: 利用TRMM(Tropical Rainfall Measuring Mission)卫星探测结果结合NCEP(National Centers for Environmental Prediction)再分析资料, 对2007年7月17日四川、重庆地区的一次西南涡强降水系统和2008年7月21日四川东部的东移高原涡强降水系统的三维结构特征、雨顶高度以及降水廓线特征进行对比分析研究。结果表明:(1)两次降水过程均是发生在西南—东北向的水汽辐合带中, 且降水云群均位于低涡的东南方。(2)两次强降水在水平结构上均表现为由一个主降水雨带和多个零散降水云团组成, 高原涡强降水过程比西南涡强降水的降水强度和范围都要大。降水雷达探测到的两个中尺度降水系统均以降水范围大、强度弱的层云降水为主, 但对流性降水对总降水量的贡献较大, 其中西南涡降水中对流降水所占比例比高原涡的大, 对总降水率的贡献也大。(3)垂直结构上:两次强降水的雨顶高度均是随地表雨强的增加而增加, 且最大雨顶高度接近16 km, 但西南涡强降水中的雨顶高度比高原涡更高, 说明西南涡降水过程中对流旺盛程度强于高原涡。(4)两次强降水中雨滴碰并增长过程以及凝结潜热的释放主要集中在8 km以下, 但8 km以上西南涡降水变化大于高原涡, 且前者在8~12 km高度层的降水量对总降水量贡献百分比大于后者。
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  • 收稿日期:  2013-09-10
  • 修回日期:  2014-07-04

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