CAJ | 학술논문

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。
이용호화호특시자동참관측적기상요소자료화탐공자료이급호화호특시배경감측참감측적PM10수거,분석료사진폭과경전후지면기상요소、고공풍화리사손수이급PM10변화특정。결과표명：사진폭발생전수지면저기압공제,공기겁도간난,풍향위은정적서남풍,3～5.5km고도상유교강적동량하전,대기불은정성재500～400hPa지간。사진폭과경시기온신속하강,풍속급극증대,풍향돌변위서북풍,공기정간랭상태,1.5～3km고도상유교강적동량하전,대기적불은정성주요발생재850 hPa이하。사진폭발생시교발생전PM10농도치증가21배。
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.