摘要
利用常规天气资料、自动气象站资料、观象台风廓线雷达资料及污染资料,分析了2005年11月2-5日发生在北京的一次持续雾霾天气过程中中低空扰动、山谷风以及城市热岛对PM10浓度的影响。结果表明:PM10对中低空的扰动很敏感,且扰动越靠近地面,层次越厚,污染指数下降越明显;城区PM10浓度明显高于清洁对照站定陵,但北京地方性山谷风对城郊浓度日变化有明显影响,当谷风加强时,定陵站浓度接近城区并有可能高于城区浓度,谷风有对城区重污染向郊区输送的作用;雾霾天气下热岛效应显著,热岛对PM10浓度的影响相对气象条件和人类活动的影响来说很小。
Using the regular weather data, automatic weather station data, wind profile radar data, and the environment pollution data, the pollution influencing cause is analyzed during November 2-5 in 2005 when the air quality is serious including the disturb of low-middle level, the mountain-valley wind and the urban heat. The result shows： PM10 is sensitivity to the air disturb of low-middle level, and the disturb level is lower or deeper the air pollution index reduces more obviously. Usually PM10 concentration of urban is higher than that of suburb, but when valley wind strengthens which may take the high PM10 concentration of city centre to suburb, and it may cause PM10 concentration of suburb to become near to that of urban or higher. Although urban heat island effect is obvious, the influence of which is less than that of other weather causes and human activities.
出处
《气象与环境科学》
2010年第1期12-16,共5页
Meteorological and Environmental Sciences
基金
中央级公益性科研院所基本科研业务专项基金项目"北京静稳天气的气象场特征分析和预报概念模型的建立"(IUMKY200802)资助
关键词
雾霾
PM10
风廓线雷达
山谷风
热岛
fog-haze
PM10
wind profile radar
mountain-valley wind
heat island
