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中国农学通报 ›› 2019, Vol. 35 ›› Issue (2): 100-103.doi: 10.11924/j.issn.1000-6850.casb18020072

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

咸宁城区降水对PM2.5和O3的清除作用的初步分析

赵雅静1, 周登1, 吴栋桥1, 蒋惠梦2   

  1. 1.咸宁市气象局 湖北咸宁;2.武汉大学资源与环境科学学院环境工程系
  • 收稿日期:2018-02-23 修回日期:2018-12-24 接受日期:2018-05-25 出版日期:2019-01-11 发布日期:2019-01-11
  • 通讯作者: 周登
  • 基金资助:
    国家自然科学基金“华中背景地区大气挥发性有机物(VOCs)的来源与光化学反应性”(41673102)。

Scavenging Effect of Rainfall on PM2.5 and O3 in Urban Area of Xianning: A Preliminary Analysis

  • Received:2018-02-23 Revised:2018-12-24 Accepted:2018-05-25 Online:2019-01-11 Published:2019-01-11

摘要: 为了研究咸宁城区降水对PM2.5和O3质量浓度的影响,采用“清除效率与降水时间、降水量总量和降水前其质量浓度关系的方法”分析了咸宁城区2015年1月至2016年12月211次降水数据,结果表明:降水对二者的清除效果随雨强、降水持续时间及降水总量增加而增加;当降水开始前PM2.5、O3质量浓度较低时,降水对其清除效果不理想,降水开始前二者浓度较高时,降水对其有明显的清除作用。结论:当降水量大于5.0mm时,且降水过程前PM2.5和O3质量浓度大于65μg/m3时,降水的清除效果随着降水量的增加而越明显。

关键词: 南美天胡荽, 南美天胡荽, 快速繁殖技术, 不定芽, 生根率

Abstract: To study the influence of rainfall on mass concentration of PM2.5 and O3 in urban areas, we analyzed 211 rainfall data from January 2015 to December 2016 in Xianning by analyzing the relation between scavenging efficiency and rainfall time, total rainfall amount and the mass concentration of PM2.5 and O3 before rainfall. The results showed that the scavenging effect increased with the increase of rainfall intensity, time of duration and total amount, in case of lower mass concentration of PM2.5 and O3 before rainfall, the scavenging effect was not so obvious; in case of higher mass concentration of PM2.5 and O3 before rainfall, rainfall had obvious scavenging effect on them. In conclusion: when the rainfall amount is greater than 5.0 mm and the mass concentration of PM2.5 and O3 are greater than 65 μg/m3, the scavenging effect of rainfall is more obvious with the increase of rainfall amount.