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| 2004年梅雨期武汉上空水汽的演变及其与暴雨的关系 | |
| 引用本文： | 李武阶,李俊,公颖,王娟.2004年梅雨期武汉上空水汽的演变及其与暴雨的关系[J].气象,2007,33(2):3-9. |
| 作者姓名： | 李武阶 李俊 公颖 王娟 |
| 作者单位： | 1. 南京大学大气科学系,南京,210093;中国气象局武汉暴雨研究所 2. 中国气象局武汉暴雨研究所 3. 黑龙江省嫩江县气象局 |
| 基金项目： | 湖北省科技攻关项目;科技部科研院所社会公益研究专项基金 |
| 摘 要： | 利用2004年6—7月武汉每天两个时次探空资料计算出的可降水量以及各层的比湿和相对湿度，对比分析各种水汽量的垂直分布以及逐日演变特征，探讨了2004年梅雨期武汉上空水汽的演变及其与暴雨的关系。结果表明，武汉上空大气中水汽含量随高度递减，90％以上的水汽集中在700hPa以下；7月的水汽含量高于6月；武汉上空出现整层比湿增长或中高层比湿增长可导致整层相对湿度明显增长，而且增长的幅度随高度递增；在暴雨分析预报中，分析中高层水汽演变好于分析低层水汽演变；采用整层平均相对湿度和可降水量结合分析整层水汽演变以及将中高层平均的比湿和相对湿度结合分析中高层水汽演变时，对暴雨预报均有很好的指示意义。 |
| 关 键 词： | 梅雨期 水汽 演变特征 暴雨 |
| 收稿时间： | 2006/5/26 0:00:00 |
| 修稿时间： | 2006-05-26 |
Evolution Characteristics of Vapor over Wuhan in Meiyu Period in 2004 and Its Relationship with Heavy Rainfall |
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| Li Wujie,Li Jun,Gong Ying and Wang Juan.Evolution Characteristics of Vapor over Wuhan in Meiyu Period in 2004 and Its Relationship with Heavy Rainfall[J].Meteorological Monthly,2007,33(2):3-9. | |
| Authors: | Li Wujie Li Jun Gong Ying and Wang Juan |
| Institution: | 1. Department of Atmosphere Science, Nanjing University, 210093; 2. Institute of Heavy Rain, CMA, Wuhan; 3. Nenjiang Meteorological Office, Heilongiiang Provinee |
| Abstract: | Using Wuhan twice daily radiosounding data from June to July in 2004, the precipitable water, specific humidity and relative humidity are calculated. By contrasting and analyzing the characteristics of the vertical distribution and the daily variation of those vapor parameters, the evolution characteristics of the vapor over Wuhan in Meiyu period in 2004 and its relationship with heavy rainfall are discussed. The result shows that the vapor content in the air over Wuhandecreases with the height and 90 percent of vapor concentrates below 700hPa. The vapor content in July is more than that in June. The specific humidity increase in the whole layer or in the middie-and upper-level can lead to the evident increase of the whole layer relative humidity over Wuhan, and the increasing degree increases with the height. In the course of analyzing and forecasting heavy rain, it is better to analyze the vapor evolution in the middle-and upper-level than that in the low-level. They are all very meaningful indicators for heavy rain forecast to analyze the total layer vapor evolution combining the total layer mean relative humidity with precipitable water, and to analyze the middle- and upper- level vapor evolution combining average specific humiditv with relative humidity of the middle- and uDDer- level. |
| Keywords: | Meiyu period water vapor evolution character heavy rain |
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