张庆红
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张庆红
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论文成果
Interaction between concentric eye-walls in super typhoon Winnie (1997)
发布时间：2022-10-08点击次数：
影响因子：
7.237
DOI码：
10.1256/qj.04.33
发表刊物：
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
摘要：
Super typhoon Winnie had one of the largest eye-walls ever recorded in the western Pacific Ocean. The diameter of the Outer eye-wall reached 370 kill when Winnie passed through Okinawa on 16 August 1997. Observations revealed a 24-hour intensity cycle of concentric eye-walls after the large eye-wall formed. Using the Penn State University/National Center for Atmospheric Research mesoscale model MM5 with 3 kill grid horizontal spacing oil the finest nested mesh, Winnie was successfully simulated in terms of concentric eye-wails, spiral rain hands in the moat and the cycle of concentric eye-walls.
The life cycle of concentric eye-walls is found to be associated with vortex Rossby wave propagation in the moat. The propagation properties of the IN (rainfall) spiral band, are found to be consistent with predictions using vortex Rossby theory. The initial inward vorticity gradient at the inner edge Of the outer eye-wall and outward vorticity gradient at the outer edge of the inner eye-wall support inward and outward PV (rainfall) spiral bands, respectively, in the moat at the lower level. At the middle level, only all Outward vorticity gradient exists at the outer edge of the inner eye-wall, which permits (he development of all outward PV band in the moat at initial time. The inward spiral PV train) band moves faster than the outward PV (rain) band and both of them propagate cyclonically. At 09 h, when the fast inward PV band catches Up to the slow outward PV band, the slow outward rain band is replaced by the fast inward rain band. resulting in a well-developed and independent inner eye-wall at 14 h. After the vorticity gradient near the inner eye-wall becomes stronger than that near the outer eye-wall at lower level, the whole convective core is attracted to the outer eye-wall. It finally merges with it at 37 h, leaving a weak vortex in the centre. The concentric eye-walls of Winnie interact with each other through vortex Rossby waves.
卷号：
131
期号：
612
页面范围：
3183-3204
是否译文：
否
发表时间：
2005-10-01
收录刊物：
SCI
附件：