Air pollution characteristics and their relation to meteorological conditions during 2014-2015 in major Chinese cities
Air pollution characteristics and their relation to meteorological conditions during 2014-2015 in major Chinese cities
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DOI：
10.1016/j.envpol.2017.01.050
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发表时间：
2017-04-01
影响因子：
8.9
通讯作者：
Li, Ruipeng
中科院分区：
文献类型：
--
作者：
He, Jianjun;Gong, Sunling;Li, Ruipeng
2013年1月，基于中国主要城市空气质量监测站数据的六种污染物（CO，NO2，O-3，PM10，PM2.5和SO2）的实时小时平均浓度向公众发布。该报告为公布全国污染的时空特征提供了一个良好的机会。虽然有几项研究系统地调查了污染物浓度的时间和空间趋势，但空气污染与多尺度气象条件之间的关系及其在全国范围内的空间变化仍然不清楚。本研究分析了2014-2015年中国31个省会城市的空气污染特征及其与多尺度气象条件的关系。2014年，31个省会城市六项污染物年均浓度分别为1.2、42.4、49.0、109.8、63.7、32.6 μ m。2015年，CO、NO2、PM10、PM2.5和SO2年均浓度分别下降5.3%、4.9%、11.4%、12.0%和21.5%，而O-3年均浓度上升7.4%。中国主要污染物的最高比率是PM2.5，其次是PM10，O-3，NO2，SO2和CO。气象条件是决定污染物浓度的日常变化的主要因素，解释了超过70%的中国日平均污染物浓度的方差。2015年的气象条件比2014年更不利于污染物扩散，表明空气质量的改善是由排放控制引起的。(C)2017爱思唯尔有限公司版权所有
In January 2013, the real-time hourly average concentrations of six pollutants (CO, NO2, O-3, PM10, PM2.5 and SO2) based on data from air quality monitoring stations in major Chinese cities were released to the public. That report provided a good opportunity to publicise nationwide temporal and spatial pollution characteristics. Although several studies systematically investigated the temporal and spatial trends of pollutant concentrations, the relation between air pollution and multi-scale meteorological conditions and their spatial variations on a nationwide scale remain unclear. This study analysed the air pollution characteristics and their relation to multi-scale meteorological conditions during 2014-2015 in 31 provincial capital cities in China. The annual average concentrations of six pollutants for 31 provincial capital cities were 1.2 mg m(-3), 42.4 mu g m(-3), 49.0 mu g m(-3), 109.8 mu g m(-3), 63.7 mu g m(-3), and 32.6 mu g m(-3) in 2014. The annual average concentrations decreased 5.3%, 4.9%, 11.4%, 12.0% and 21.5% for CO, NO2, PM10, PM2.5 and SO2, respectively, but increased 7.4% for O-3 in 2015. The highest rate of a major pollutant over China was PM2.5 followed by PM10, O-3, NO2, SO2 and CO. Meteorological conditions were the primary factor determining day-to-day variations in pollutant concentrations, explaining more than 70% of the variance of daily average pollutant concentrations over China. Meteorological conditions in 2015 were more adverse for pollutant dispersion than in 2014, indicating that the improvement in air quality was caused by emission controls. (C) 2017 Elsevier Ltd. All rights reserved.