北京市冬季气象要素对气溶胶浓度日变化的影响  

Impact of Meteorological Factors on Aerosol Concentration Diurnal Variation in Beijing Winter

作　　者：王开燕[1,3] 王雪梅[1] 张仁健[2] 朱建军 

机构地区：[1]中山大学环境科学与工程学院,广东广州510275 [2]中国科学院大气物理研究所,东亚区域气候-环境重点实验室,北京100029 [3]广州市南沙区气象局,广东广州511458

出　　处：《环境科学研究》2008年第4期132-135,共4页Research of Environmental Sciences

基　　金：国家重点基础研究发展计划(973)项目(2006CB400501);国家自然科学基金面上项目(40205017)

摘　　要：对2004年1月1—15日北京气溶胶浓度与相对湿度、气压、风速、风向等气象要素的平均日变化进行分析,结果表明:北京冬季ρ(PM10)日变化明显,受气象要素的日变化影响.ρ(PM10)与相对湿度和气压呈正相关性;风速对ρ(PM10)的日变化影响明显,09:00—18:00风速和ρ(PM10)变化趋势一致,呈正相关性,其他时间则呈负相关性;风向对粗、细粒子的数浓度影响不同,细粒子数浓度在偏东风时大,西、西南风时小,而粗粒子则相反;粗、细粒子的数浓度日变化受气象要素的影响程度不同,相对于粗粒子,细粒子数浓度更易受气象要素日变化的影响.Aerosol samples and meteorological data, which were collected during January 1-15, 2004 at Beijing, were analyzed with the average diurnal variation of meteorological factors such as relative humidity, pressure, wind velocity, and wind direction. The results show that ρ（PM10 ） in winter have obvious diurnal variation and are influenced by diurnal variation of meteorological factors, p （PM10） are positively correlated with the relative humidity and pressure; wind speed has obvious impact on ρ（ PM10 ） diurnal variation, wind speed and ρ（PM10 ） have consistent trend from 09：00 to 18：00 while they are negatively correlated at the rest of time of the day. The impact of wind direction on coarse and fine particle is different, the number density of fine particle is larger when the wind direction is east, while it is smaller as the wind direction is west and southwest; the coarse particle is contrary. Impact of meteorological factors on coarse particle and fine particle are different. Compared to coarse particles, fine particles are more vulnerable to the meteorological factors diurnal variation.

关 键 词：气溶胶 气象要素 日变化 

分 类 号：X513[环境科学与工程—环境工程]