Daily variations of size-segregated ambient particulate matter in Beijing

被引：34

作者：

Zhou, Bangtian ^{[1
]}

Shen, Huizhong ^{[1
]}

Huang, Ye ^{[1
]}

Li, Wei ^{[1
]}

Chen, Han ^{[1
]}

Zhang, Yanyan ^{[1
]}

Su, Shu ^{[1
]}

Chen, Yuanchen ^{[1
]}

Lin, Nan ^{[1
]}

Zhuo, Shaojie ^{[1
]}

Zhong, Qirui ^{[1
]}

Liu, Junfeng ^{[1
]}

Li, Bengang ^{[1
]}

Tao, Shu ^{[1
]}

机构：

[1] Peking Univ, Coll Urban & Environm Sci, Lab Earth Surface Proc, Beijing 100871, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2015年 / 197卷

基金：

中国国家自然科学基金;

关键词：

PM2.5; Air pollution; Size distribution; Meteorological conditions; Beijing; AIR-POLLUTION; AEROSOL; URBAN; PM2.5; PARTICLES; EXPOSURE; CITIES; DISTRIBUTIONS; MORTALITY; QUALITY;

D O I：

10.1016/j.envpol.2014.11.029

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Daily, size-segregated particulate matter (PM) samples were collected at Peking University from March 2012 to April 2013. Seventeen indoor air samples were also collected over this period. Winter PM concentrations decreased compared with those reported a decade ago, but summer PM concentrations increased over the same time period. Increasing summer PM concentrations likely resulted from a shift in the major source of PM from primary coal burning to vehicle-associated secondary particle formation. A multiple regression model explained 62% of daily PM concentration variations, and wind direction was the most important factor controlling PM concentrations. Severe pollution was often associated with southeasterly winds, while westerly and northwesterly winds brought relatively clean air. Temperature, precipitation and relative humidity also affected PM concentrations. PM concentrations indoors were generally lower than, but significantly correlated with ambient concentrations. Indoor PM concentrations were also affected by wind speed and temperature. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：36 / 42

页数：7

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