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暴雨灾害  2020, Vol. 39 Issue (3): 300-305    DOI: 10.3969/j.issn.1004-9045.2020.03.011
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一次极端短时强降水过程中FY-3微波湿度计观测特征分析
张萍萍, 徐双柱, 董良鹏, 张蒙蒙
武汉中心气象台, 武汉 430074
Analysis of observation characteristic of FY-3 microwave hygrometer during an extreme short-term heavy precipitation process
ZHANG Pingping, XU shuangzhu, DONG Liangpeng, ZHANG Mengmeng
Wuhan Central Meteorological Observatory, Wuhan 430074
 全文: PDF (3674 KB)   HTML ( 输出: BibTeX | EndNote (RIS)      背景资料
摘要 利用FY-3微波湿度计资料和常规观测资料,对2016年贵州至湖北一次强降水事件中极端短时强降水站点、一般性短时强降水站点上空对流云的微波观测特征进行了对比分析。结果表明:(1)极端短时强降水站点上空150 GHz附近窗区探测通道亮温低于一般性短时降水站点。(2)极端短时强降水站点上空水汽通道亮温垂直分布呈现漏斗状,对干侵入有一定指示作用,亮温最低值出现在183.31±7 GHz附近,主要为暖云降水;一般性短时强降水站点上空水汽通道亮温垂直分布则呈竖条形,亮温最低值出现在183.31±3 GHz和183.31±7 GHz探测通道附近,为冷云暖云混合降水。(3)极端短时强降水站点上空未出现冲顶对流,但低层对流发展旺盛;一般性短时强降水站点上空出现冲顶对流,但低层对流发展强度偏弱。
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张萍萍
徐双柱
董良鹏
张蒙蒙
关键词FY-3微波湿度计   极端短时强降水   冲顶对流   干侵入     
Abstract: Based on data of FY-3 satellite microwave hygrometer and conventional observation, microwave observational characteristics of convective clouds during a heavy precipitation event from Giuzhou to Hubei province in 2016 were analyzed. The results show that (1) The brightness temperature at the window channel near 150 GHz over an extreme short-term heavy rainfall station is lower than that of the non-extreme short-term heavy rainfall station. (2) The brightness temperature vertical distribution at water vapor absorption channel is fun-nel-shaped over the extreme short-term heavy rainfall station, which is a certain indication of dry invasion. The lowest brightness tempera-ture occurs near 183.31±7 GHz, indicating warm cloud precipitation. However, the brightness temperature vertical distribution at water va-por absorption channel is vertical-bar shaped over the non-extreme short-term heavy rainfall station. The lowest brightness temperature oc-curs near 183.31±3 GHz and 183.31±7 GHz, indicating precipitation of mixed cold and warm clouds. (3) There is no topping convection over extreme short-term heavy rainfall stations, but the low-level convection develops vigorously. Top-rushing convection appears over non-extreme short-term heavy rainfall stations, but the intensity of low-level convection is weak.
Key wordsFY-3 microwave hygrometer   extreme short-term heavy rainfall   flush convection   dry intrusion   
收稿日期: 2018-01-25;
基金资助:湖北省气象局科技基金项目(2020Y02);中国气象局卫星应用专项(FY-4(01)-UDS-1.1.7);中国气象局公益性行业(气象)科研专项(GYHY201306011)
作者简介: 张萍萍,主要从事短期暴雨及极端降水天气预报分析研究。E-mail:zpp7117@126.com
引用本文:   
张萍萍, 徐双柱, 董良鹏,等 .2020. 一次极端短时强降水过程中FY-3微波湿度计观测特征分析[J]. 暴雨灾害, 39(3): 300-305.
ZHANG Pingping, XU shuangzhu, DONG Liangpeng, et al .2020. Analysis of observation characteristic of FY-3 microwave hygrometer during an extreme short-term heavy precipitation process[J]. Torrential Rain and Disasters, 39(3): 300-305.
 
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