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遥感技术与应用  2014, Vol. 29 Issue (4): 594-599    DOI: doi:10.11873/j.issn.1004-0323.2014.4.0594
遥感应用     
星载雷达观测分析亚洲季风区对流层顶附近的对流活动
何文英,卞建春,陈洪滨
(中国科学院大气物理研究所大气遥感与中层探测重点试验室,北京100029)
The Convection Events over Asian Monsoon Region Deriving from the Space-born Radar Observations
He Wenying,Bian Jianchun,Chen Hongbin
(LAGEO,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China)
 全文: PDF(4425 KB)  
摘要:

为了加深理解东亚地区对流活动对于对流层顶部—平流层下部区域(UTLS)物质传输的影响,首个星载降雨雷达(Precipitation Radar,PR)观测资料用以研究该地区夏季对流活动特征及其对流穿越的概率分布特征。3年的PR数据分析结果显示,亚洲季风区夏季降水概率在孟加拉湾附近较高,其中对流性降水在印度地区最为显著,而我国对流性降水出现概率普遍偏低。深对流活动出现概率在印度最高,达到15%,其次是我国西南、华南地区和部分东南亚国家达到10%,其他大部分地区低于5%。此外,穿越14km高度的强对流活动在印度地区的出现概率最大(~2%),其次是我国西南和部分东南亚地区(~1%),其他大部分地区都没有出现穿越性对流;而强对流穿过NCEP资料提供的对流层顶高度的概率分布与前者类似,不过出现概率显著减低,最高也不足0.35%。这表明随着对流层顶参考高度增加,出现穿越性对流事件则急剧减少。此外,结合以往对流层顶层的研究,研究结果显示深对流穿过对流层顶层下边界的概率高达2%,而完全穿透整个对流层顶层的概率不足0.4%。

关键词: 星载雷达亚洲季风深对流穿越性对流    
Abstract:

The observations from the first space\|born Precipitation Radar(PR) are used to investigate the distribution of deep convection and overshooting events in the summer of Asian monsoon region to enhance the understanding for the effect of convection on atmospheric composition transportation in the Upper Troposphere\|Lower Stratosphere (UTLS).In this paper,the distribution of precipitation,convective rainfall and deep convection as well as overshooting events in the summer of Asian monsoon region are analyzed from the three\|year PR observation.In general,the occurrence frequency of those variables in the different years looks similar and is much close,which reflects that the distribution results are representable and reasonable.The distribution results over Asian monsoon region show that the higher probability of rainfall occurs around the Bengal\|bay,and the convective rainfall is the most significant in India,but is rather lower in China.For the deep convection,the occurrence probability is the highest about 15% in India,then the south\|west of China,southern China and part of South\|east of the Asia is the second high about 10%,and the most of remain area is lower than 5%.As to overshooting events,the distribution of convection overshooting 14 km is similar to that of deep convection,which shows that the highest frequency is occurred in India still with 2% probability,the second is the south\|west of China and part of South\|east of Asia with 1% occurrence,and no overshooting events in the most of remain place.For the convection overshooting the Tropopause height derived from NCEP data,its occurrence frequency is similar to the former,but the ratio decreased dramatically,such as less than 0.35%,which demonstrates that the convection overshooting events reduced dramatically with the increased referred Tropopause height.In addition,based on the preivious studies on tropopause layer (TL),our results show that the occurrence probability of the convection overshootting the lower boundary of TL is about 2%,while overshooting the whole TL is less than 0.4%。

Key words: Space-born Radar    Asian Monsoon    Deep convection    Overshooting
收稿日期: 2016-04-23 出版日期: 2014-09-19
:  TP 79  
基金资助:

国家973计划项目子课题(2010CB428602\,2010CB950802)资助。

作者简介: 何文英(1973-)女,四川达州人,博士,副研究员,主要从事微波遥感理论和应用研究。Email:hwy@mail.iap.ac.cn。
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引用本文:

何文英,卞建春,陈洪滨. 星载雷达观测分析亚洲季风区对流层顶附近的对流活动[J]. 遥感技术与应用, 2014, 29(4): 594-599.

He Wenying,Bian Jianchun,Chen Hongbin. The Convection Events over Asian Monsoon Region Deriving from the Space-born Radar Observations. Remote Sensing Technology and Application, 2014, 29(4): 594-599.

链接本文:

http://www.rsta.ac.cn/CN/doi:10.11873/j.issn.1004-0323.2014.4.0594        http://www.rsta.ac.cn/CN/Y2014/V29/I4/594

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