| 东亚冬季风中非地转风的初步研究 |
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| 引用本文： | 卢文通,丁一汇,温市耕.东亚冬季风中非地转风的初步研究[J].应用气象学报,1988,3(2):138-150. |
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| 作者姓名： | 卢文通 丁一汇 温市耕 |
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| 作者单位： | 1.中国科学院大气物理所
(卢文通)，国家气象局气象科学研究院
(丁一汇)，内蒙古气象局气象台(温市耕) |
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| 摘 要： | 本文对非地转风在东亚冬季冷空气活动过程中的作用及影响非地转风的主要因子等问题进行了初步研究，并讨论了非地转风在有限区动能收支中的作用。结果表明，非地转风是冷空气过程中地面偏北大风加强的主要原因之一，非地转风次级环流使东亚高空西风急流和Hadley环流得以加强，而高空西风急流具有次地转的特征。变高、惯性平流和摩擦作用是影响非地转风的主要因子。此外，位温局地变化，位温平流和非绝热作用对非地转风的形成亦有相当大的贡献，但该三项非地转风分量的向量和接近于零。非地转风在有限区动能的收支中也起着十分重要的作用。
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A Study on the Ageostrophic Wind During Winter Monsoon over East Asia |
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| Affiliation: | 1) (Institute of Atmospheric Physics, Academia Sinica); 2) (Academy of Meteorological Science, SMA); 3) (Meteorological Observatory of Inner Mogolia Autonomous Region) |
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| Abstract: | A diagnostic study has been made on the ageostrophic wind and the primary factors which can affect the ageostrophic wind in strong cold air outbreak in winter over East Asia. The results has indicated that the ageostrophic wind is one of the most significant factors. It may cause the strengthening of the surface and lower level north wind. Agostrophic secondary circulations are formed near the frontal zones as well as in the entrance and exit regions of the upper level westerly jet, resulting in the strengthening of the jet stream and local Hadley circulation in East Asia. However, the upper level westerly jet in East Asia is subgeostrophic. The allohypsic wind, inertial advection and friction effect are the main factors which influence on the ageostrophic wind. In addition, the local change of the potential temperature, the advection of the potential temperature and diabatic heating play a certain role in the formation of the ageostrophic wind, but the composite wind vector of these three ageostrophic wind components is very small due to the offsetting of them. The ageostrophic wind plays a very important part in the kinetic energy budget in limited areas in East Asia. |
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