| 一个南海热带气旋发展的环流特征分析 |
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| 引用本文： | 周学群.一个南海热带气旋发展的环流特征分析[J].海洋预报,1992,9(4):52-58. |
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| 作者姓名： | 周学群 |
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| 作者单位： | 南海舰队隧气象区台 |
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| 摘 要： | 本文用ECMWF2.5×2.5网格点资料通过一个例子,对有利于南海热带气旋发展的环流场作了详细的分析,发现几点事实:(1)扰动在风的垂直切变较大的环境中仍可发展。(2)扰动位于中、低空西南急流左侧,高空南支东风急流右侧时,有利发展。(3)中,低空西南急流形成了扰动环流的强风潮,强风潮从扰动南侧入角,并包围扰动的东半圆。(4)扰动中、低层的入流和高层的外流呈现严重的不对称性。(5)当扰动发展到一定强度时,对南海热带季风环流圈的加强起到正反馈作用。
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| 关 键 词： | 南海 热带 气旋 大气环流 |
THE LARGE-SCALE FEATURE CONDUCING TO TROPICAL CYCLONE IN THE SOUTH CHINA SEA DEVELOPED |
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| Zhou Xuequn.THE LARGE-SCALE FEATURE CONDUCING TO TROPICAL CYCLONE IN THE SOUTH CHINA SEA DEVELOPED[J].Marine Forecasts,1992,9(4):52-58. |
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| Authors: | Zhou Xuequn |
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| Institution: | Meteorological Observatory of the South China Sea fleet |
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| Abstract: | By using ECMWF 2.5 x 2.5 grid data, the atmospheric circulation feild which conduced to the tropical cyclone in the South China Sea has been analyzed in detail by means of one case. Some facts were found: l)When the disturbance is in the enviroment of greater vertical wind shear, it might still develop. 2)When the disturbance is in the left side of southwesterly jet in the middle and low level and in right side of upper-level easterly jet of southerly branch,it is conducive to development. 3)The southwesterly jet in the middle and level formed strong breeze tide of disturbance circulation, whlich entered from the south side of disturbance and enclose the hemicyclc of disturbance. 4 ) In the disturbance, inward flow in the low- level and outward flow in the upper-level appeared serious non-symmetry. 5 ) When the disturbance developed to a certain intension, it will play a role of the positive feedback in the tropical monsoon circulation in the South China Sea. |
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| Keywords: | strong breeze inward flow outward flow |
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