Particulate Matter Distributions in China during a Winter Period with Frequent Pollution Episodes (January 2013)
Particulate Matter Distributions in China during a Winter Period with Frequent Pollution Episodes (January 2013)
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DOI：
10.4209/aaqr.2014.04.0070
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发表时间：
2015-04-01
影响因子：
4
通讯作者：
Hao, Jiming
中科院分区：
文献类型：
--
作者：
Jiang, Jingkun;Zhou, Wei;Hao, Jiming
使用 74 个城市每小时的 PM2.5 和 PM10 浓度分析了 2013 年 1 月中国的颗粒物分布。本月共发生五起雾霾事件。 2013年1月上旬，PM2.5和PM10浓度均快速上升，全月均维持在较高水平，月平均值分别为128.7和184.4μg/m(3)。 1月12日，本月污染最严重的一天，13个城市PM2.5日均浓度大于300微克/米(3)为重度污染，18个城市PM2.5日均浓度在200至300微克/米(3)之间为重度污染。这些事件往往发生在以华北平原为污染最严重地区的大空间区域，包括京津冀地区（北京、天津、河北省）。 PM2.5和PM10均与环境CO、NO2和SO2浓度具有良好的相关性。高 PM 浓度通常发生在低风速和高相对湿度的情况下。此外，2013年1月的PM水平与其他国际城市进行了比较。
Particulate matter distributions in China during January 2013 were analyzed using hourly PM2.5 and PM10 concentrations from 74 cities. Five haze episodes occurred in this month. Both PM2.5 and PM10 concentrations increased rapidly at the beginning of January 2013 and remained at high levels throughout the month with monthly average values of 128.7 and 184.4 mu g/m(3), respectively. On January 12th, the most polluted day in this month, 13 cites were severely polluted with daily average PM2.5 concentrations greater than 300 mu g/m(3), and 18 cities were heavily polluted with daily average PM2.5 concentrations between 200 and 300 mu g/m(3). These episodes often occurred in a large spatial domain with the North China Plain as the most polluted area, including Jing-Jin-Ji area (Beijing, Tianjin, and Heibei provinces). Both PM2.5 and PM10 had good correlations with ambient CO, NO2, and SO2 concentrations. High PM concentrations often occurred at low wind speeds and high relative humidity. In addition, PM levels in January 2013 were compared with those from other international cities.