MESOSCALE RAINSTORM SYSTEM UNDER THE COUPLING OF LOW-LEVEL AND UPPER-LEVEL JETS AND TYPHOON CIRCULATION

Chen Jiukang; Ding Zhiying

Vol.11, NO.3, 2000

Article Contents

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Chen Jiukang, Ding Zhiying. Mesoscale rainstorm system under the coupling of low-level and upper-level jets and typhoon circulation. J Appl Meteor Sci, 2000, 11(3): 271-281.

Citation:

Chen Jiukang, Ding Zhiying. Mesoscale rainstorm system under the coupling of low-level and upper-level jets and typhoon circulation. J Appl Meteor Sci, 2000, 11(3): 271-281.

Chen Jiukang, Ding Zhiying. Mesoscale rainstorm system under the coupling of low-level and upper-level jets and typhoon circulation. J Appl Meteor Sci, 2000, 11(3): 271-281.

Citation:

Chen Jiukang, Ding Zhiying. Mesoscale rainstorm system under the coupling of low-level and upper-level jets and typhoon circulation. J Appl Meteor Sci, 2000, 11(3): 271-281.

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MESOSCALE RAINSTORM SYSTEM UNDER THE COUPLING OF LOW-LEVEL AND UPPER-LEVEL JETS AND TYPHOON CIRCULATION

Nanjing Institute of Meteorology, Nanjing 210044

Received Date: 1998-12-29
Rev Recd Date: 1999-10-10
Publish Date: 2000-08-31

Abstract

Abstract

After No.9216 typhoon landed, it moved to the right entrance of the southwesterly jet at the 200 hPa level. A mesoscale rainstorm was generated and developed in the area far from the typhoon center. By using a 2-layer model, the process is analyzed and the positive feedback mechanism of the mesoscale storm rainfall with the coupling of low-level and upper-level jets and the typhoon circulation is studied. The results indicate that the Wave-CISK process and the symmetric instability of the baroclinic basic flow are the reasonable dynamic causes of the development of the low-level jet and the generation of the inverted trough. The baroclinic atmosphere with convective instability is advantageous to the development of instability of northward inertial gravity waves.
- Jet;
- Typhoon;
- Symmetric instability;
- Wave-CISK

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References(12)

Figures and Tables

图 1 8月31日20:00 200 hPa、850 hPa (a) 高度场与急流 (b) 风速

(图a中, 虚矢线:850 hPa急流; 实矢线:200 hPa急流; 实线:200 hPa高度场; 虚线:850 hPa高度场; 双虚线:850 hPa倒槽; 图b中, 实线:850 hPa场; 虚线:200 hPa场.单位:m/s)

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图 2 8月31日20:00 200 hPa散度场实况 (单位:10^-5 s^-1)

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图 3 8月31日20:00动力变压

(实矢线:31日20:00 200 hPa高空急流轴; 虚矢线:30日20:00 200 hPa高空急流; 实线:台风移动变压; 虚线:动力变压.单位:hPa)

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图 4 模式垂直分层示意图

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图 5 高空急流下方倒槽形成的示意图

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图 6 高空急流下方切变线形成的示意图

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References

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