乌鲁木齐大气污染物的空间分布及地面风场效应  

Spatial Distributions of Atmospheric Contaminations and Effect of Surface Wind in Urumqi

作　　者：吴彦 王健[2] 刘晖 路光辉 崔新华[3] 

机构地区：[1]新疆气象台,新疆乌鲁木齐830002 [2]乌鲁木齐市气象局,新疆乌鲁木齐830002 [3]新疆自治区气象局信息中心,新疆乌鲁木齐830002

出　　处：《中国沙漠》2008年第5期986-991,共6页Journal of Desert Research

基　　金：新疆气象局气象科技研究课题(200703)资助

摘　　要：通过对1999—2001年乌鲁木齐市监测站3种污染物浓度的分析,比较深入地掌握了乌鲁木齐市区不同季节污染物的空间分布状况,得出城市首要污染物是PM10,污染物主要在乌鲁木齐市天山区堆积;利用乌鲁木齐城郊地面风场资料、海拔1000 m高度探空风场资料分析了地面风场常年特征、季节变化特点,得出冬季城中偏南和偏北有辐合性流场,夏季整个城市为辐散性流场;近地层冬季静风频率高;结合污染物的空间分布和高空风场特征,从一个方面解释了乌鲁木齐冬季、夏季污染物浓度变化的原因。In this paper we analyzed the spatial distributions of atmospheric contaminations in different sea- sons around Urumqi city by using three kinds of contamination concentration data which were observed dur- ing 1999--2001 at Urumqi Monitoring Stations. The results show that the predominant contamination is PM^0 and the largest concentration area is Tianshan district. We also analyzed the mean annual characteris- tics and seasonal variations of surface wind and high level wind at 1 000 m. We found that in winter, there are convergence wind flows in southern and northern city, whereas in summer the air flows are divergent within the whole city. The frequency of stationary wind in winter is relatively high. With these conclusions we can explain the reasons of variation of contaminations concentrations of Urumqi in winter and summer from an aspect.

关 键 词：乌鲁木齐 大气污染物 PM10 空间分布 风场特征 

分 类 号：X513[环境科学与工程—环境工程]