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污染天气条件下人工降雨对成渝西南区域环境空气质量的影响评估
Impact Assessment of Artificial Rainfall on Ambient Air Quality in Southwest Chengdu-Chongqing Area in Polluted Weather Conditions
投稿时间:2022-03-25  修订日期:2022-10-24
DOI:10.19316/j.issn.1002-6002.2023.04.09
中文关键词:  污染天气  人工降雨  成渝地区  环境空气质量
英文关键词:pollution weather  artificial rainfall  Chengdu-Chongqing area  ambient air quality
基金项目:乐山市2022年重点科技计划项目(22SZD009)
作者单位
龚韬 四川省乐山生态环境监测中心站, 四川 乐山 614000 
张勇 乐山市气象台, 四川 乐山 614000 
齐国伟* 四川省乐山生态环境监测中心站, 四川 乐山 614000 
肖瀛川 乐山市气象台, 四川 乐山 614000 
邹爱华 四川省乐山生态环境监测中心站, 四川 乐山 614000 
罗兆威 乐山市气象局人工影响天气办公室, 四川 乐山 614000 
通讯作者:齐国伟*  四川省乐山生态环境监测中心站, 四川 乐山 614000  
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中文摘要:
      基于成渝地区大气污染防控形势的严峻性,选取该区域西南部的乐山市作为研究对象,对2016—2020年人工降雨对该城市环境空气质量的影响进行研究。评估发现:冬季改善效果最好,平均每毫米降雨量可降低环境空气质量指数(AQI)约10,对应的SO2、NO2、CO、O3、PM10、PM2.5浓度分别降低1.8 μg/m3、3.8 μg/m3、0.1 mg/m3、8.1 μg/m3、6.9 μg/m3、8.9 μg/m3;其次是春季,每毫米降雨量可降低AQI约8,对应的6项污染物浓度分别降低1.0 μg/m3、3.3 μg/m3、0.1 mg/m3、8.1 μg/m3、6.1 μg/m3、8.4 μg/m3;再次是夏季,每毫米降雨量可降低AQI约3,对应的6项污染物浓度分别降低0.6 μg/m3、1.6 μg/m3、0.03 mg/m3、6.9 μg/m3、1.2 μg/m3、2.0 μg/m3;秋季每毫米降雨量可降低AQI约1,对应的6项污染物浓度分别降低0.4 μg/m3、0.6 μg/m3、0.01 mg/m3、3.5 μg/m3、0.1 μg/m3、0.1 μg/m3。计算不同季节降雨总量与污染物削减量之间的Pearson相关系数,结果表明,春季人工降雨总量与O3浓度削减总量呈显著正相关,夏、秋两季人工降雨总量与PM2.5浓度削减总量呈显著正相关。
英文摘要:
      Based on the severity of air pollution prevention and control situation in Chengdu-Chongqing region,Leshan City in the southwest of this region was selected as the research object to study the impact of artificial rainfall on the city's ambient air quality during 2016-2020.The assessment found that the improvement was greatest in winter,when the average rainfall per millimetre reduced the ambient air quality index (AQI) by about 10,and the concentrations of SO2,NO2,CO,O3,PM10,PM2.5 decreased by 1.8 μg/m3,3.8 μg/m3,0.1 mg/m3,8.1 μg/m3,6.9 μg/m3,8.9 μg/m3,respectively.Followed by spring,rainfall per millimeter could reduce AQI about 8,the corresponding 6 pollutant concentration decreased by 1.0 μg/m3,3.3 μg/m3,0.1mg/m3,8.1 μg/m3,6.1 μg/m3,8.4 μg/m3.In summer,rainfall per millimeter could reduce AQI about 3,the corresponding 6 pollutant concentration decreased by 0.6 μg/m3,1.6 μg/m3,0.03 mg/m3,6.9 μg/m3,1.2 μg/m3,2.0 μg/m3.Autumn rainfall per millimeter could reduce AQI about 1,the corresponding 6 pollutant concentration decreased by 0.4 μg/m3,0.6 μg/m3,0.01 mg/m3,3.5 μg/m3,0.1 μg/m3,0.1 μg/m3,respectively.The Pearson correlation coefficient between rainfall and pollutant reduction in different seasons was calculated.The results showed that there was a significant positive correlation between the total amount of artificial rain in spring and the total amount of O3,and a significant positive correlation between the total amount of artificial rain and the PM2.5 concentration reduction amount in summer and fall.
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