| 一次沙尘暴过境前后呼市气象要素和PM10变化特征 |
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| 引用本文： | 李杨,司瑶冰,李云鹏.一次沙尘暴过境前后呼市气象要素和PM10变化特征[J].内蒙古气象,2012(3):23-25,31. |
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| 作者姓名： | 李杨 司瑶冰 李云鹏 |
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| 作者单位： | 1. 内蒙古气象服务中心,内蒙古呼和浩特,010051
2. 内蒙古生态与农业气象中心,内蒙古呼和浩特,010051 |
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| 摘 要： | 利用呼和浩特市自动站观测的气象要素资料和探空资料以及呼和浩特市环境监测站监测的PM10数据,分析了沙尘暴过境前后地面气象要素、高空风和理查逊数以及PM10变化特征。结果表明:沙尘暴发生前受地面低气压控制,空气极度干暖,风向为稳定的西南风,3～5.5km高度上有较强的动量下传,大气不稳定性在500～400hPa之间。沙尘暴过境时气温迅速下降,风速急剧增大,风向突变为西北风,空气呈干冷状态,1.5～3km高度上有较强的动量下传,大气的不稳定性主要发生在850 hPa以下。沙尘暴发生时较发生前PM10浓度值增加21倍。
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| 关 键 词： | 沙尘暴 气象要素 理查逊数 PM10 |
The Variation Characteristic of Meteorological Element and PM10 before and after a Sand-dust Storm in Hohhot |
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| Authors: | Li Yang Si Yaobing Li Yunpeng |
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| Institution: | 2 (Inner Mongolian Meteorological Service Center, Inner Mongolia Hohhot 010051; 2. Inner Mongolia Ecology and Agrimeteorology Centre, Inner Mongolia Hohhot 010051) |
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| Abstract: | By using Hohhot AWS observations of meteorological data, sounding information and enwronmentat monitoring in Hohhot PM10 data, analyzing of elements changes of ground weather, high-ahitude winds changes, atmospheric instability changes and changing characteristics of PM10 before and after sandstorm. Results indicate that： before sandstorm, surface is under low pressure control, air is extremely dry and warm, the wind is steady South-West wind while on 3 - 5.5 km altitude strong momentum is to download, and atmospheric instability is between 500 - 400hPa; after sandstorm, temperature drops rapidly, wind speed increases immediately, wind mutations to North-West wind, air is dry and cold, on 1.5 - 3kin altitude strong momentum to download, and atmosphere instability is usually lower than 850hPa; the concentration of PM,0 increases by 21 times when sandstorm happens. |
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| Keywords: | Sand-dust storm Meteorological elements Richardson number PM10 |
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