近地表气象风速对固定点位环境空气PM<sub>2.5</sub>污染贡献影响研究

丁铭; 郁建桥<sup>*</sup>; 钟声

引用本文:	丁铭，郁建桥，钟声.近地表气象风速对固定点位环境空气PM_2.5污染贡献影响研究[J].环境监控与预警,2022,14(6):17-21
	DING Ming,YU Jian-qiao,ZHONG Sheng.Study on the Fixed Station’s Contribution of PM_2.5 Pollutants in the Influence of Near surface Meteorological Wind Speed[J].Environmental Monitoring and Forewarning,2022,14(6):17-21

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近地表气象风速对固定点位环境空气PM_2.5污染贡献影响研究
丁铭，郁建桥，钟声
江苏省环境监测中心,江苏南京 210036

摘要:

根据2019—2021年江苏省13个市的近地面风速、风向及细颗粒物（PM_2.5）的小时监测结果, 计算不同风速区间频度及PM_2.5污染贡献占比的影响。结果表明, 风速区间频度及PM_2.5污染贡献占比对监测点位的影响存在一定差异。在固定点位周边半径7 km内，绝对影响风速频度为78.9%，PM_2.5贡献占比为82.4%；半径3 km内，直接影响风速频度为70.4%，PM_2.5贡献占比为80.6%。从区域变化来看，0~3 m/s风速区间内，各市风速频度贡献为59.4%~92.0%，平均值为78.9%。以南京、连云港某大气自动站为例，站点的PM_2.5贡献占比、影响风速频度与站点半径呈反比例关系。

关键词: 气象风速固定点位细颗粒物污染贡献江苏省

DOI：

分类号:X823

基金项目:江苏省环境监测科研基金资助项目（1723）；江苏省科技项目创新能力建设计划（研发机构）基金资助项目（BM2022036）

Study on the Fixed Station’s Contribution of PM_2.5 Pollutants in the Influence of Near surface Meteorological Wind Speed

DING Ming,YU Jian-qiao,ZHONG Sheng

Jiangsu Provincial Environmental Monitoring Center, Nanjing,Jiangsu 210036,China

Abstract:

Based on the hourly monitoring results of surface wind speed, wind direction and fine particles (PM_2.5) in 13 cities of Jiangsu Province in 2019—2021, the influence of the frequency of wind speed range and the percentage of PM_2.5 contribution were figured out. The results show that the influence on research area fixed station is different between the frequency of wind speed range and the percentage of PM_2.5 contribution. In general, within the radius of 7 km, the influence probability of wind speed is 78.9% and the contribution of PM_2.5 is 82.4%. Within a radius of 3 km, the frequency of near surface wind speed is 70.4%, and the contribution of PM_2.5 is 80.6%. From the perspective of regional variation, the frequency of 0～3 m/s wind speed range is 59.4%~92.0%, with an average value of 78.9%. In Nanjing and Lianyungang, the proportion of PM_2.5 contribution and the frequency of wind speed are inversely proportional to the site radius.

Key words: Meteorological wind speed Fixed station PM_2.5 Monitoring Contribution of Pollutants Jiangsu Province