| 呼和浩特地区一次强沙尘暴天气分析 |
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| 引用本文： | 韩仙桃,赵艳丽,杨彩云,杜文娟,王阿美.呼和浩特地区一次强沙尘暴天气分析[J].内蒙古气象,2011(1):10-12. |
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| 作者姓名： | 韩仙桃 赵艳丽 杨彩云 杜文娟 王阿美 |
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| 作者单位： | 呼和浩特市气象局,内蒙古,呼和浩特,010020 |
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| 摘 要： | 通过对2008年5月28—29日呼和浩特大部地区出现的沙尘暴天气进行分析得出:此次沙尘暴是由高空冷涡配合地面蒙古气旋形成的;沙尘主要源于蒙古国西部、南部,在高空锋区的作用下,由冷涡旋转携带而至;大气低层干燥的空气和较强的垂直上升运动为沙尘卷入空中提供了条件;较强的斜压作用出现在低层,这对于有效位能的释放、动能的产生以及气旋的发展有重要作用,同时斜压强迫使动量下传,从而形成强风,触发了沙尘暴;此次沙尘暴主要产生于冷锋附近及其后部。
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| 关 键 词： | 沙尘暴 蒙古气旋 斜压作用 垂直运动 |
An Investigation of Strong Sand-dust storm over Huhhot Area |
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| Authors: | Han Xiantao ZhaoYanli Yang Caiyun Du Wenjuan Wang Amei |
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| Institution: | Han Xiantao,ZhaoYanli,Yang Caiyun,Du Wenjuan,Wang Amei(Hohhot Meteorological Bureau,Inner Mongolia Hohhot 010020) |
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| Abstract: | Strong sand-dust storm on May 28—29,2008 in most areas of Hohhot was analyzed.The result showed that sand-dust storm were caused by high-altitude cold cyclone vortex and Mongolia cyclone,dust source which were brought by the cold vortex under the influence of the high-altitude front zone,were mainly from western,southern Mongolia,the dry air of atmospheric low-level and strong vertical ascending motion provided the conditions for the sand-dust into the air,a strong baroclinicity in the low-level plays an important role in the release of potential energy,generation of kinetic energy and the development of cyclones.At the same time the baroclinicity forces the momentum to descend,thus forming a strong wind and sand-dust storms. |
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| Keywords: | sand-dust storm Mongolia cyclone baroclinicity influence vertical ascending motion |
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