ANALYSIS OF SOME OBSERVATIONAL FACTS RELATED TO TORRENTIAL RAINS IN JULY 1998 IN WUHAN AND THE VICINAL AREA

Xu Xianan

Vol.12, NO.3, 2001

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2001 > 12(3): 327-336

Xu Xianan. Analysis of some observational facts related to torrential rains in July 1998 in Wuhan and the vicinal area. J Appl Meteor Sci, 2001, 12(3): 327-336.

Citation:

Xu Xianan. Analysis of some observational facts related to torrential rains in July 1998 in Wuhan and the vicinal area. J Appl Meteor Sci, 2001, 12(3): 327-336.

Xu Xianan. Analysis of some observational facts related to torrential rains in July 1998 in Wuhan and the vicinal area. J Appl Meteor Sci, 2001, 12(3): 327-336.

Citation:

Xu Xianan. Analysis of some observational facts related to torrential rains in July 1998 in Wuhan and the vicinal area. J Appl Meteor Sci, 2001, 12(3): 327-336.

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ANALYSIS OF SOME OBSERVATIONAL FACTS RELATED TO TORRENTIAL RAINS IN JULY 1998 IN WUHAN AND THE VICINAL AREA

Xu Xianan

National Meteorological Center, Beijing 100081

Received Date: 2000-03-29
Rev Recd Date: 2000-07-27
Publish Date: 2001-08-31

Abstract

Abstract

Some observational facts of the to rrential rain event occurred in Wuhan and the vicinal area from 20 to 23, July 1998 are analyzed by using conventional and intensive observational data as well as satellite data. The results show that this event was directly caused by a meso-α scale convergence center in the lower troposphere. The meso-α scale system has a cold core structure and a warm core in the upper troposphere. The strong disturbance in the upper troposphere and lower stratosphere and the mesoscale disturbance at surface are related with this torrential rain.
- Torrential rain;
- Observational fact;
- Mesoscale convergence center;
- System strcture

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References(3)

Figures and Tables

图 1 1998年7月20日00:00UTC～23日00:00UTC

(其中, 湖北省为至22日12:00UTC) 降水量图 (等雨量线单位为 mm)

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图 2 1998年7月20～21日武汉及其附近地区GMS IR云图

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图 3 1998年7月20日12:00UTC～22日12:00UTC武汉及其附近地区每小时降水量和地面风的演变

(a) 20日12:00UTC～21日12:00UTC (b) 21日12:00UTC～22日12:00UTC (降水量单位: mm; 风速单位: m/s, 风矢上长划表示 4 m/s, 短划表示 2 m/s)

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图 4 1998年7月20～22日高空流线图

(a) 、(b) 和 (c) 850 hPa, (d) 、(e) 和 (f) 700 hPa

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图 5 1998年7月21～22日垂直空间剖面图 (a) 7月21日00:00UTC沿114°E, (b) 7月21日00:00UTC沿30°N, (c) 7月21日12:00UTC沿114°E, (d) 7月22日00:00UTC沿114°E

(细实线: 等假相当位温θ_se线间隔为 4 K, 和 >400 K为8 K; 断线: 等温线间隔为4 ℃; 点断线: 垂直于剖面图的等西风风速线间隔为 4 m/s; 粗实线: 锋区和对流层顶)

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图 6 1998年7月19～23日武汉高空垂直时间剖面图

(点线: 等比湿线 g/kg, 实线: 高度时间扰动等高线间隔4 dagpm, 断线: 温度时间扰动等温线间隔2 ℃)

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References

[1]	中国气象局国家气候中心.98中国大洪水和气候异常.北京:气象出版社, 1998.15~16.
[2]	徐夏囡, 焦佩金.夏季江淮气旋的结构.大气科学, 1984, 6(8): 189~196. http://www.cnki.com.cn/Article/CJFDTOTAL-DQXK198402008.htm
[3]	胡伯威, 崔春光, 房春花, 等.1998年7月21~22日鄂东沿江特大暴雨成因探讨.杭州:第四届东亚及西太平洋气象与气候研讨会, 1999.213~216. http://kns.cnki.net/KCMS/detail/detail.aspx?dbcode=CJFQ&dbname=CJFD2001&filename=DQXK200104004&v=MjA0MjIxTHV4WVM3RGgxVDNxVHJXTTFGckNVUkwyZlkrWm5GaURsVmIzTklUelRaYkc0SHRETXE0OUZZSVI4ZVg=