| 民勤沙尘暴分布的地理因素及其前期气象特征 |
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| 引用本文： | 常兆丰,赵明,韩福贵,仲生年.民勤沙尘暴分布的地理因素及其前期气象特征[J].干旱区地理,2009,32(3). |
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| 作者姓名： | 常兆丰 赵明 韩福贵 仲生年 |
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| 作者单位： | 甘肃民勤荒漠草地生态系统国家野外观测研究站,甘肃省荒漠化防治重点实验室,甘肃省治沙研究所,甘肃,武威,733000 |
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| 摘 要： | 民勤沙区沙尘暴频繁,沙尘暴的分布与其所处的地理位置和当地的地表特征密切相关.河西走廊是我国寒潮南下的必经要道,民勤县恰位于这条寒潮路径的中心线路上,沙尘暴的发生季节、发生次数均与寒潮存在显著相关关系.民勤境内及其周围沙漠广布,且大面积沙漠裸露,易形成以沙漠为中心的高温低压区,与西西伯利亚向东南方向扩散的冷高压形成明显的气压梯度.当地的沙尘暴以中沙尘暴和强沙尘暴为主,沙尘暴发生的季节、时间等都具有一定的规律性,沙尘暴的主风向以NW、WNW为主,与该路径上的寒潮方向完全一致.沙尘暴前期在气温、气压、风速、风向等气象要素方面均会表现出明显的异常特征,当地沙尘暴的季节分布特征也异常明显,依据沙尘暴前期气象要素的异常特征和沙尘暴分布的季节特征以及沙尘暴在前站后站之间的运移方向和速度就可以对沙尘暴进行预测、预报和预防.
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| 关 键 词： | 沙尘暴 寒潮 地理因素 气象特征 民勤 |
Geographical factors affecting sandstorm distribution and characteristics of previous meteorological elements in Minqin County |
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| CHANG Zhao-feng,ZHAO Ming,HAN Fu-gui,ZHONG Sheng-nian.Geographical factors affecting sandstorm distribution and characteristics of previous meteorological elements in Minqin County[J].Arid Land Geography,2009,32(3). |
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| Authors: | CHANG Zhao-feng ZHAO Ming HAN Fu-gui ZHONG Sheng-nian |
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| Institution: | CHANG Zhao-feng,ZHAO Ming,HAN Fu-gui,ZHONG Sheng-nian (Minqin National Field Observation & Research Station on Ecosystem of Desertified Rangeland,Gansu,Key Laboratory of Desertification Combating,Gansu Desert Control Research Institute,Wuwei 733000,China) |
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| Abstract: | It is evidently relative with geographical location and surface feature of landform that the sandstorm occurs frequently and distributes widely in Minqin County,Gansu Province,China.The Hexi Corridor is a way that the cold waves must flow towards the south of China.Minqin County is just right located on the way' s central path. In the study area,the sandstorm occurrence' s season and times are evidently correlated with the cold waves.The large area of desert without Vegetation cover is widely distributed in... |
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| Keywords: | sandstorm cold wave geographical factor meteorological characteristic Minqin County |
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