Effects of Rainfall on PM2.5 and PM10 in the Middle Reaches of the Yangtze River
Effects of Rainfall on PM2.5 and PM10 in the Middle Reaches of the Yangtze River
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长江中游地区降雨对PM2.5和PM10的影响
DOI：
10.1155/2020/2398146
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发表时间：
2020-07
影响因子：
2.9
通讯作者：
Liwen Zhang
中科院分区：
文献类型：
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作者：
Yue Zhou;Yanyu Yue;Yongqing Bai;Liwen Zhang
基于2015年1月1日至2017年12月31日51个国家空气质量监测站获取的PM2.5和PM10质量浓度数据以及湖北省自动气象站相应的降雨强度数据，分析了相对不同湿度条件下降雨强度对PM质量浓度的影响。结果显示，污染过程中以小雨为主，襄阳市受影响时间长达587小时。 PM浓度在降水的影响下不会发生剧烈变化。 PM10和PM2.5湿增长的平均降雨强度主要为2.5，显着高于PM10（>1.0毫米/小时）（>1.4毫米/小时）。 PM质量浓度初始值越大，降水越容易产生湿去除效应，反之，越容易产生湿生长效应，PM10质量浓度阈值为150 μg/m3，PM2.5质量浓度阈值为95 μg/m3。湿去除在较低的湿度（~60%）和较大的降雨强度中发挥了主导作用，但湿生长在较高的湿度（~90%）和较低的降雨强度中发挥了主导作用。随着降水量的增加（降雨量≥1.5 mm·h−1），湿法对PM10质量浓度的去除作用更加明显。降水影响下PM2.5的变化与PM10的变化分布相似，但降水的除湿作用减弱，湿增长作用增强。
Based on the PM2.5 and PM10 mass concentration data obtained from 51 national air quality monitoring stations and the corresponding rainfall intensity data in automatic meteorological stations in Hubei Province from 1 January 2015 to 31 December 2017, the impact of rainfall intensity on PM mass concentrations under relatively different humidity conditions was analyzed. The results showed that light rain occurred most frequently in the pollution process, with Xiangyang being affected for up to 587 h. PM concentration would not change drastically under the effect of precipitation. Mean rainfall intensity responsible for wet growth of PM10 and PM2.5 was mainly 2.5 was significantly higher (>1.4 mm/h) than that of PM10 (>1.0 mm/h). Precipitation was more likely to produce a wet removal effect for a greater initial value of PM mass concentration, and on the contrary, a wet growth effect was more likely, with the threshold of PM10 mass concentration being 150 μg/m3 and that of PM2.5 mass concentration being 95 μg/m3. Wet removal played a leading role in lower humidity (∼60%) and greater rainfall intensity, but wet growth played a leading role in higher humidity (∼90%) and lower rainfall intensity. As the precipitation level increased (rainfall ≥1.5 mm·h−1), the wet removal to PM10 mass concentration was enhanced more obviously. The variations of PM2.5 had similar distributions to those of PM10 under the effect of precipitation, but the wet removal effect of precipitation was weakened and the wet growth effect was enhanced.
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DOI：
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发表时间：
2016
期刊：
--
影响因子：
--
作者：
X. Jianming;Chang Luyu;Ma Jinghui;Mao Zhuocheng;Chen Lei;Cao Yu
通讯作者：
X. Jianming;Chang Luyu;Ma Jinghui;Mao Zhuocheng;Chen Lei;Cao Yu
DOI：
10.13227/j.hjkx.2016.10.002
发表时间：
2016-10
期刊：
Huan jing ke xue= Huanjing kexue
影响因子：
--
作者：
Qun Dong;P. Zhao;Yi-na Chen
通讯作者：
Qun Dong;P. Zhao;Yi-na Chen
影响因子：
--
作者：
Xiaoye Zhang;Junying Sun;Yaqiang Wang;Weijun Li;Qiang Zhang;Weigang Wang;J. Quan;G. Cao;
通讯作者：
Xiaoye Zhang;Junying Sun;Yaqiang Wang;Weijun Li;Qiang Zhang;Weigang Wang;J. Quan;G. Cao;
DOI：
10.7522/j.issn.1000-0534.2015.00086
发表时间：
2016-12
期刊：
Plateau Meteorology
影响因子：
--
作者：
Bai Yongqing;Qi Haixia;Liu Lin;Cui Chun-guang;Lin Chun-ze;Tan Chenghao
通讯作者：
Bai Yongqing;Qi Haixia;Liu Lin;Cui Chun-guang;Lin Chun-ze;Tan Chenghao
影响因子：
5.7
作者：
Zhang RenHe;Li Qiang;Zhang RuoNan
通讯作者：
Zhang RuoNan