成都市城东区浓雾时大气颗粒物的总数密度及质量变化特征  

CHARACTERISTICS OF NUMBER DENSITY AND QUALITY OF AIRBORNE PARTICULATE DURING DENSE FOG TIME IN THE EASTERN CHENGDU

作　　者：韩才义[1] 许模[1] 李海华[1] 李晓东[2] 

机构地区：[1]成都理工大学环境与土木工程学院,成都610059 [2]中国科学院地球化学研究所,贵阳550002

出　　处：《地质灾害与环境保护》2008年第4期39-42,共4页Journal of Geological Hazards and Environment Preservation

摘　　要：利用自动型尘埃颗粒激光计数器和Anderson采样器，对成都市城东区两次浓雾天前后颗粒物的总数密度和质量分别进行了分析，得到颗粒物的物理变化特征，结果表明，浓雾的存在可以改变颗粒物的物理特征：颗粒物总数密度保持在270000～310000／100cm。之间，粒径0．3～0．5μm颗粒物数密度降低，粒径在0．5～3μm之间的粗颗粒物数密度升高；质量主要集中在粒径0．65～2．1μm的积聚模态颗粒物上。We studied the number density and quality of airborne particulate during two dense fog times in the eastern Cheng- du, using automatic particle laser counter and Anderson sampler. The result indicated that the dense fog can affect the physical characteristic of airborne particulate： the total number density kept within 270 000-310 000/100 cms , and the number density of particle size in 0.3-0.5 μm decreased, but those of particle size in 0.5-3.0μm increased; the quality mainly eoncentrated in ＂accumulation mode＂ particulate whose particle size was in 0.65-2.1μm.

关 键 词：浓雾 颗粒物 数密度 质量 

分 类 号：P426.4[天文地球—大气科学及气象学]