| 东亚寒潮高压的位涡诊断研究 |
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| 引用本文： | 张培忠,丁一汇.东亚寒潮高压的位涡诊断研究[J].应用气象学报,1994,5(1):49-56. |
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| 作者姓名： | 张培忠 丁一汇 |
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| 作者单位： | 1.内蒙古自治区气象科学研究所，中国气象科学研究院，内蒙古自治区气象通信中心，内蒙古自治区科委计算中心 |
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| 摘 要： | 用位势涡度方程对1980年1月26—30日东亚寒潮高压的演变做了诊断研究，表明高压中心地区低层是低值位涡区，位涡值随高压增强（减弱）而变小（变大）；随着高压的发展加强，位涡最小值由对流层中层降到近地面层，随着高压的减弱，最小值中心又上升；对流层高层的位涡值随着地面高压的增强而加大，反映高空冷槽、地面高压同时在发展。位涡收支方程各项对高压发展、减弱有着不同的作用。作用最大的是地转风水平平流项和地转偏差风的散度项，其次是地转偏差风的平流项和辐射项，扭转项和热成风偏差项均甚小，可忽略不计。
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| 关 键 词： | 位势涡度 寒潮高压 |
A Diagnostic Study of Budget of Potential Vorticity for Cold Wave-related Anticyclone in East Asia |
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| Zhang Peizhong.A Diagnostic Study of Budget of Potential Vorticity for Cold Wave-related Anticyclone in East Asia[J].Quarterly Journal of Applied Meteorology,1994,5(1):49-56. |
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| Authors: | Zhang Peizhong |
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| Institution: | 1.1) (Meteorological Research Institute of Inner-Mongolia, Hohhot 010051); 2) (Chinese Academy of Meteorological Sciences, Beijing 100081); 3) (Meteorological Communication Center of Inner-Mongolia, Hohhot 010051); 4) (Computer Center of Scientific and Technological Committee of Inner-Mongolia, Hohhot 010020) |
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| Abstract: | A diagnostic study is made of a cold wave-related anticyclone in East Asia,for 26-30 January 1980,by using the potential vorticity equations. The results show that atthe initiation stage in the vicinity of anticyclonic centre there is a low potential vorticityarea where it decreases(increases)with the intensification(descension)of the high;when the high developing it descends from the middle troposphere to the nearer groundlayer,when the high decaying it ascends from the lower troposphere;while the poten-tial vorticity in upper troposphere increases with the intensification of surface high. The various terms in the potential vorticity equations have made very different con-tributions to the evolution of the anticyclone. The first contribution comes from thegeostrophic advection of potential vorticity and the divergence term of geostrophic devia-tion wind.The secondary are the advection of geostrophic deviation wind and radiationheating(cooling).The twisting term and thermal wind term could be ignored. |
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| Keywords: | Potential vorticity Cold wave high |
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