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中文摘要: 应用高分辨TBB亮温资料和逐6小时一次的NCEP/NCAR再分析资料，分析了1998年7月5日北京地区发生的一次大暴雨天气过程。结果表明：北京地区雨量分布不均是由于西部山区出现两次对流活动而东部平原地区仅为一次，TBB低值区右前方下沉区有利于其后部对流的发展；暴雨阶段视热源(Q1)的视减湿(Q2)局地变化项和平流项均非小项，两者具有反位相变化特征，垂直输送项是视热源和视减湿的主要贡献者；Q1和Q2的高度-时间演变与暴雨的出现是一致的，暴雨发生时段对应着Q1和Q2的高值区。视热源加热中心出现在500hPa高度，而视减湿中心主要在700hPa附近。
中文关键词: 视热源，视减湿，TBB亮温，大暴雨
Abstract:Using high resolution GMS TBB data and every 6h NCEP/NCAR reanalysis data,the synoptic course of a heavy rain over Beijing on 5 July,1998 was studied.Results show that the convective activity can be developed and maintained easily following the ahead of V pattern low TBB region,and there are two convective activities occurring in western Beijing on 5 July.It is also found that local variation and advective term of apparent heat sources(Q1) or moisture sinks(Q2) can not be neglected alone except considering both in the meantime,Q1 and Q2 are mostly contributed by vertical advective terms,the heat center of Q1 is near by 500hPa,while the heat center of Q2 is about at 700hPa.The spatial and temporal distributions of Q1 and Q2 which describe the strong vertical eddy heat and moisture transport during the heavy rain were presented in detail.
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引用文本：
郭幼君,2000.北京一次大暴雨过程视热源和视减湿特征分析[J].气象,26(11):7-13.
,2000.Analysis of Apparent Heat Sources and Moisture Sinks over Beijing during the Heavy Rain in 1998[J].Meteor Mon,26(11):7-13.
郭幼君,2000.北京一次大暴雨过程视热源和视减湿特征分析[J].气象,26(11):7-13.
,2000.Analysis of Apparent Heat Sources and Moisture Sinks over Beijing during the Heavy Rain in 1998[J].Meteor Mon,26(11):7-13.