RESEARCH ON COMPOSITE DIAGNOSIS AND MECHANISMS OF EXPLOSIVE CYCLONES

Ding Zhiying; Wang Jinsong; Zhai Zhaofeng

Vol.12, NO.1, 2001

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Ding Zhiying, Wang Jinsong, Zhai Zhaofeng. Research on composite diagnosis and mechanisms of explosive cyclones. J Appl Meteor Sci, 2001, 12(1): 30-40.

Citation:

Ding Zhiying, Wang Jinsong, Zhai Zhaofeng. Research on composite diagnosis and mechanisms of explosive cyclones. J Appl Meteor Sci, 2001, 12(1): 30-40.

Ding Zhiying, Wang Jinsong, Zhai Zhaofeng. Research on composite diagnosis and mechanisms of explosive cyclones. J Appl Meteor Sci, 2001, 12(1): 30-40.

Citation:

Ding Zhiying, Wang Jinsong, Zhai Zhaofeng. Research on composite diagnosis and mechanisms of explosive cyclones. J Appl Meteor Sci, 2001, 12(1): 30-40.

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RESEARCH ON COMPOSITE DIAGNOSIS AND MECHANISMS OF EXPLOSIVE CYCLONES

1.
Nanjing Institute of Meteorology, Nanjing 210044
2.
National Research Center for Marine Environmental Forecasts, Beijing 100081

Received Date: 1999-08-02
Rev Recd Date: 1999-12-27
Publish Date: 2001-02-28

Abstract

Abstract

In this paper, 16 explosive cyclones over Atlantic and Pacific oceans are analyzed. The "weak" and "strong" explosive cyclones are diagnosed and compared. It is found that the basic fields are different at many aspects. The formation of strong explosive cyclones is related to the non-zonal upper jet of anticyclonic curvature. The jet can cause the upper divergence fields and baroclinity and baroclinic instability as well as the development of internal gravity waves northward. The warm advection and diabatic heating can increase the curvature. In general, when the larger value centers of potential vorticity move toward the centers of explosive cyclones, it is advantageous to explosive cyclones.
- Pacific;
- Atlantic;
- Explosive cyclone;
- Composite diagnosis;
- Non-zonal upper jet

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References(13)

Figures and Tables

图 1 太平洋、大西洋上, 爆发前, 200 hPa强、弱气旋温度场、高度场、风矢量场

(图中*为地面气旋所在位置 (下同), 虚线为等温线 (℃), 实线为等高线 (gpm) 箭头线为风矢量 (风速大小与箭头长短成正比) ), 左: 强气旋, 右: 弱气旋

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图 2 两大洋上强气旋爆发前高空 (200 hPa) v场 (m/s) 分布 ; 左: 太平洋, 右: 大西洋

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图 3 爆发时, 大西洋上过气旋中心的涡度 (×10^-5s^-1) 东西向垂直剖面

(纵轴单位为 hPa, 横轴表示离地面气旋的距离 (×90 km) (下同) ), 左: 强气旋, 右: 弱气旋

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图 4 (a) 大西洋上强气旋爆发前200 hPa θ场 (K) 分布

(图中箭头为n的方向, 其长短定性表示了的大小 (b) 大西洋上强气旋爆发前200～850 hPa (×10^-3s^-1)分布, 图中箭头为n的方向)

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图 5 太平洋 (a、b)、大西洋 (c、d) 爆发前过气旋中心相当位温 (K) 的东西向垂直剖面, 左: 强气旋, 右: 弱气旋

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图 6 太平洋 (a b)、大西洋 (c d) 上过爆发时气旋中心绝对位势涡度 (×10^-6m²·K·s^-1·g^-1)的东西向垂直剖面, 左: 强气旋, 右: 弱气旋

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表 1 16个爆发性气旋的强度和爆发时及其前后地面气旋的位置

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