| 2000年河西秋、冬季沙尘暴成因分析及预报着眼点 |
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| 引用本文： | 殷雪莲,曹玲,丁荣,成华,胡晓晖.2000年河西秋、冬季沙尘暴成因分析及预报着眼点[J].甘肃气象,2001,19(2):48-51. |
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| 作者姓名： | 殷雪莲 曹玲 丁荣 成华 胡晓晖 |
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| 作者单位： | 甘肃省张掖地区气象局!甘肃张掖734000 |
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| 摘 要： | 文中从天气气候背景及天气学、动力诊断等方面 ,分析 2 0 0 0年秋、冬季河西大风和沙尘暴天气的形成原因 ,分析结果表明 ,几次大风、沙尘暴过程都是在高空 5 0 0hPa环流形势由纬向环流向径向环流调整的过程中 ,西西伯利亚强冷空气沿西北气流迅速南下 ,在蒙古地面热低压强烈发展的有利的热力和动力条件下发生的。同时 ,今年秋、冬季河西气温明显偏高 ,降水偏少以及河西地区特殊的地理环境 ,加剧了大风和沙尘暴天气的出现频次和强度。通过分析 ,初步总结出了此类天气的预报着眼点。
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| 关 键 词： | 冬季沙尘暴 成因分析 预报着眼点 |
| 文章编号： | 1006-7639(2001)-02-0048-04 |
| 修稿时间： | 2001年2月25日 |
AN Analysis on the Forming Cause of Sandstorm Event and its Forecast Focus in Autumn- Winter of 2000 in Gansu Corridor |
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| YIN Xue-lian,CAO Ling,DING Rong,CHENG Hua,HU Xiao-hui.AN Analysis on the Forming Cause of Sandstorm Event and its Forecast Focus in Autumn- Winter of 2000 in Gansu Corridor[J].Gansu Meteorology,2001,19(2):48-51. |
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| Authors: | YIN Xue-lian CAO Ling DING Rong CHENG Hua HU Xiao-hui |
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| Abstract: | The cause of formation of the gale and sandstorm in atumun-winter of 2000 in Gansu Corridor analysed by the weather and climate background,synoptics and dynamic diagnose.The result shows that several gale and sandstorm events occur on the advantaged dynamic and thermodynamic conditions of upper-air pattern adjusting from zonal circulation to meridional circulation on the 500hPa,west Siberian strong cold air rapidly moving southwardly and the heat low in Mongolia powerfully development.Meanwhile,the warm and dry in autumn-winter is favorable for the gale and sandstorm generation.Finally,the focus of prediction for such weather is summarized. |
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| Keywords: | winter sandstorm cause analysis the focus prediction |
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