| 宁夏中北部沙尘暴过程中气象要素变化特征及成因分析 |
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| 引用本文： | 李艳春,赵光平,胡文东,李艳芳.宁夏中北部沙尘暴过程中气象要素变化特征及成因分析[J].高原气象,2005,24(2):212-217. |
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| 作者姓名： | 李艳春 赵光平 胡文东 李艳芳 |
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| 作者单位： | 1. 宁夏气象防灾减灾重点实验室,宁夏,银川,750002
2. 宁夏民航气象台,宁夏,银川,750001 |
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| 基金项目： | 国家自然科学基金项目(40065002，40365002)，宁夏回族自治区自然科学基金项目(A1017)共同资助 |
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| 摘 要： | 利用常规气象观测资料，统计分析了宁夏中北部地区沙尘暴天气的持续时间及相关气象要素的变化及成因。结果表明：风向对沙尘暴天气的发生具有重要影响，从西到北之间的五个风向下发生沙尘暴天气的次数占沙尘暴天气总次数的70％以上；在同一次沙尘暴天气过程中．不同代表站沙尘暴天气的持续时间与地形、地貌及地理环境的关系最密切，其次是与最大风速的关系；但同一代表站在不同的沙尘暴天气过程中最大风速对沙尘暴天气的持续时间影响最大；沙尘暴天气发生总次数越多的测站，在同一沙尘暴天气过程中持续时间相对越长。形成盐池站多沙尘暴天气的沙源，除背景沙源外，本地沙源的补充也有重要作用。
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| 关 键 词： | 宁夏 沙尘暴 气象要素 变化特征 |
| 文章编号： | 1000-0534(2005)02-0212-06 |
Characteristic of Main Meteorological Element Changes and Cause Analyses during Sand-Dust Storm Process in Mid-and North-Parts of Ningxia |
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| LI Yan-chun,ZHAO Guang-ping,HU Wen-Dong,LI Yan-fang.Characteristic of Main Meteorological Element Changes and Cause Analyses during Sand-Dust Storm Process in Mid-and North-Parts of Ningxia[J].Plateau Meteorology,2005,24(2):212-217. |
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| Authors: | LI Yan-chun ZHAO Guang-ping HU Wen-Dong LI Yan-fang |
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| Institution: | LI Yan-chun~ |
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| Abstract: | Using the routine meteorological data, the duration, variation and causes of related meteorological elements during sand-dust storm process in mid-and north-parts of Ningxia are statistically analyzed. The resoult show that the wind directions have an important effect on the sand-dust storm weather occurring. The time of occurring sand-dust storm under five wind directions from west to north amount to 70% and over of total one. In the same sand-dust storm process, the duration of sand-dust storm at different stations is close related to the topographic, geomorphic and geographic factors, and next to the maximum wind. The influence of maximum wind in the different sand-dust storm processes at same stations on the duration of sand-dust storm is significant. The more the stations of sand-dust storm occur, the longer duration in the same sand-dust storm process is. The sand of Yanchi station during sand-dust storm not only come from the background source but also the local supply. |
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| Keywords: | Ningxia Sand-dust storm Meteorological elements Change characteristic |
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