A COMPOSITE DIAGNOSTIC STUDY OF HEAVY RAIN CAUSED BY THE NORTHEAST COLD VORTEX OVER SONGHUAJIANGNENJIANG RIVER BASIN IN SUMMER OF 1998

Sun Li; An Gang; Gao Zong ting; Tang Xiaoling; Ding Li; Sheng Baizhu

Vol.13, NO.2, 2002

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2002 > 13(2): 156-162

Sun Li, An Gang, Gao Zong ting, et al. A composite diagnostic study of heavy rain caused by the northeast cold vortex over Songhuajiang-Nenjiang River Basin in summer of 1998. J Appl Meteor Sci, 2002, 13(2): 156-162.

Citation:

Sun Li, An Gang, Gao Zong ting, et al. A composite diagnostic study of heavy rain caused by the northeast cold vortex over Songhuajiang-Nenjiang River Basin in summer of 1998. J Appl Meteor Sci, 2002, 13(2): 156-162.

Citation:

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A COMPOSITE DIAGNOSTIC STUDY OF HEAVY RAIN CAUSED BY THE NORTHEAST COLD VORTEX OVER SONGHUAJIANGNENJIANG RIVER BASIN IN SUMMER OF 1998

Research Institute of Meteorological Science, Jilin Province, Changchun 130062

Received Date: 2000-04-26
Rev Recd Date: 2000-07-10
Publish Date: 2002-04-30

Abstract

Abstract

Nine typical heavy rain events caused by the northeast cold vo rtex over Song huajiang-Nenjiang basin in China have been chosen and their composite of physical variables w ere also done.The results show that the blocking high over East Asia, the w est Pacif ic subt ropical high, the no rtheast cold vo rtex and summer monsoon moisture transportation play quite impo rtant roles in the persistent heavy rain over the Song huajiang-Nenjiang region.The special horizontal and vertical st ructures of the cold vortex itself result in the heavy rain mainly occurring to the east of the cold vortex center.
- No rtheast cold vortex;
- Heavy rain;
- Circulat ion condit ions;
- Summer monsoon;

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References(8)

Figures and Tables

图 1 1998年松嫩流域东北冷涡暴雨的平均降水分布 (单位:mm)

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图 2 500 hPa平均高度场和流场分布

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图 3 图 3a 850 hPa平均θ_se分布 (单位:K)
图 3b 1000~700 hPa水汽输送通量矢量和比湿 (单位:g·kg ^-1) 平均分布
图 3c 850 hPa平均水汽通量分布 (单位:g·kg ^-1·m·s^-1)

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图 4 沿47°N (过平均冷涡中心) 东西向垂直剖面分布

(a) 流场分布 (虚线为北风, 实线为南风, 单位:m/ s)(b) 垂直速度分布 (单位:10 ^-3 hPa/ s)(c) 涡度和散度分布 (细线为散度, 粗线为涡度, 单位:10 ^-6/ s)(d) 螺旋度分布 (单位:10 ^-8hPa/ s²)

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图 5 沿123°E (过平均强降水中心) 南北向垂直剖面分布

(a) 流场分布 (虚线为东风等风速线, 实线为西风等风速线, 单位:m/ s)(b) 涡度和散度分布 (细线为散度, 粗线为涡度, 单位:10 ^-6/ s)

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表 1 所选冷涡暴雨个例简况

References

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[5]	郑秀雅, 张廷治, 白人海.东北暴雨.北京:气象出版社, 1992.71-74.
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