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Statistic characteristics and weather significance of infrared TBB during May―August in Beijing and its vicinity

查看全文 作　　者：ZHENG [1]YongGuang;CHEN [1]Jiong;CHEN [2]MingXuan;WANG [2]YingChun;DING [3]QingLan 高影响力作者 机构地区：[1]National Meteorological Center, Beijing 100081, China;[2]Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China;[3]Beijing Meterological Office, Beijing 100089, China高影响力机构 出　　处：《Chinese Science Bulletin》索引2007年第52卷第24期,共8页高影响力期刊 基　　金：Supported by the National Major Fundamental Research 973 Program of China (Grant No. 2004CB418300);the National Natural Science Foundation of China (Grant No. 40305004);the Program of Ministry of Science and Technology of China (Grant No. 2005BA904B05);the Program of Beijing Municipal Science and Technology Commission (BMSTC) (Grant No. Z0006279040191) 摘　　要：In order to meet the demand of nowcasting convective storms in Beijing, the climatological characteristics of convective storms in Beijing and its vicinity were analyzed based on the infrared (IR) temperature of black body (TBB) data during May―August of 1997―2004. The climatological probabilities, the diurnal cycle and the spatial distribution of convective storms are given respectively in this paper. The results show that the climatological characteristics of convective storms denoted by TBB≤-52℃ are consistent with those statistic studies based on the surface and lightning observations. Furthermore, the climatological characteristics of May and June are very different from those of July and August, showing that there are two types of convective storms in this region. One occurs in the transient polar air mass on the midlatitude continent during the late spring and early summer. This type of convection arises with thunder, strong wind gust and hail over the mountainous area in the northern part of this region from afternoon to nightfall, the other occurs with heavy rainfall in the warm and moist air mass over the North China Plain and vicinity of Bohai Sea. This study also shows that the long-term data of IR TBB observed by geostationary satellite can complement the temporal and spatial limitation of the weather radar and surface observations. 关 键 词：统计表 北京 气候分析 夏季
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