| 北方麦收期间连阴雨天气环流特征 |
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| 引用本文： | 王秀文,李月安.北方麦收期间连阴雨天气环流特征[J].气象,2005,31(9):52-56. |
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| 作者姓名： | 王秀文 李月安 |
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| 作者单位： | 国家气象中心,北京,100081 |
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| 摘 要： | 利用1980-2004年5月下旬至6月中旬北方麦收区30个代表站降水实况资料，连阴雨期间亚欧范围500hPa逐日形势图和500hPa高度平均图等，分析总结了近25年来北方麦收期间连阴雨的天气气候和环流形势特征；对北方麦收期间出现的连阴雨天气过程与环流形势和影响系统的关系进行初步探讨，确定连阴雨天气的概念模型。分析表明，阻塞高压形势且贝加尔湖附近伴有冷涡是造成连阴雨天气最主要的环流特征；在500hPa地转风υ场上，麦收区多处于南北风交界处；长连阴雨期间，850hPa东亚地区中低纬度盛行南风为主要特征。
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| 关 键 词： | 北方麦收区 连阴雨天气 环流特征 物理量场 |
Analysis of Continued Cloudy-rainy Weather during Wheat Harvest Season in the North |
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| Wang Xiuwen,Li Yuean.Analysis of Continued Cloudy-rainy Weather during Wheat Harvest Season in the North[J].Meteorological Monthly,2005,31(9):52-56. |
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| Authors: | Wang Xiuwen Li Yuean |
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| Abstract: | Based on precipitation data of 30 meteorological stations in the north wheat fanning area from 1980 to 2004 from May to June, daily situation chart of 500hPa over Asia-Europe during the cloudy-rainy days and average geopotential height chart of 500hPa, the synoptic and climatically feature and the character of synoptic pattern of the continuous cloudy-rainy weather during the wheat harvest season in recent 25 years are analyzed. The relationship between the continuous cloudy-rainy process, the synoptic pattern and influencing system are studied. The result shows that block high with the cold vortex near the Baikal characterizes the synoptic pattern of continuous cloudy-rainy weather, in geostrophic wind filed of 500hPa, the wheat harvest area mainly locates in the boundary of south and north wind, during long cloudy-rainy days, south wind prevails in meridional wind field of 850hPa. |
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| Keywords: | wheat harvest area continued cloudy-rainy weather synoptic model |
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