中国中东部高山和城市夏季大气气溶胶浓度及粒径分布  

Concentrations and size distributions of summertime atmospheric aerosols at urban and alpine sites in east and central China

作　　者：戴文婷[1,2] 李建军[1] 成春雷[1] 何建辉[1] 曹军骥[1] 王格慧[1] 

机构地区：[1]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,西安710075 [2]中国科学院研究生院,北京100049

出　　处：《地球环境学报》2011年第1期263-271,共9页Journal of Earth Environment

基　　金：中国科学院项目(KZCX2-YW-148;KZCX2-YW-BR-10)

摘　　要：为了更好了解中国中东部地区高山及城市大气气溶胶变化特征与规律,于2009年夏季在华山、泰山、上海开展了大气气溶胶浓度与粒径分布观测实验。结果表明:高山点气溶胶浓度水平明显低于城市点,并且影响因素不相同。华山和泰山TSP浓度分别为(52±21)μg·m^(-3)、(80±42)μg·m^(-3),PM_(10)浓度为(43±18)μg·m^(-3)、(65±35)μg·m^(-3);而上海PM_(10)为(72±27)μg·m^(-3)。结合后向轨迹及API数据分析可知,我国东北部气团污染最严重,而西北部受沙尘影响气溶胶浓度高于南部。华山、泰山大气颗粒物主要为细模态(<2.1μm),占PM_(10)的65%~70%,最高值均在0.7~1.1岬。上海市金山及浦东区粗/细粒子比分别为1.80和1.92,说明上海市受地区道路扬尘及海盐的影响显著。To investigate the characteristics of mountain and urban aerosols in central and eastern China, TSP, PM10 and size-segregated samples were collected during 2009 summer in Mt. Hua, Mt. Tai and Shanghai. Concentrations of aerosols at Mr. Hua and Mr. Tai were lower than those in the urban area. TSP at Mt. Hua and Mt. Tai were （52±21）μg·m^-3and （80±42） μg·m^-3, while PMm were （43±18）μg·m^-3 and （65±35）μg·m^-3, respectively. PMm in Shanghai was （72±27） μg·m^-3. Based on the combined analyses of back-trajectories and API data, air masses from northeastern China were most seriously polluted, while air masses from northwestern China were more influenced by soil dust. Aerosols over Mt. Hua and Mr. Tai were dominated by fine particles （〈 2.1 μm） with the peak at 0.7-1.1 μm, which accounted for 65% and 70% of PM10 in Mt. Hua and Mt. Tai, respectively. Coarse/fine particles ratios at Jinshan and Pudong sites in Shanghai are 1.80 and 1.92, indicating the significant influence of road dust and sea salt.

关 键 词：高山 气溶胶 浓度 粒径分布 

分 类 号：X513[环境科学与工程—环境工程]