莆田市大气降尘污染特征分析

Analysis on the Pollution Characteristics of Atmospheric Dust in Putian City

本文采用莆田市2022年4月至2023年3月的大气降尘监测数据,分析莆田市大气降尘变化规律和时空分布特征。结果表明,莆田市春季和冬季降尘污染较重,夏季和秋季降尘污染较轻;2023年2月降尘量最高,2022年6月降尘量最低;各县区降尘量由大到小的排序为荔城区>涵江区>城厢区>秀屿区>仙游县;降尘与可吸入颗粒物、细颗粒物的产生源基本一致;降尘量与降水量基本呈负相关关系,与风速呈一定的正相关关系。

This paper uses atmospheric dust monitoring data from April 2022 to March 2023 in Putian City to analyze the change rules and spatiotemporal distribution characteristics of atmospheric dust in Putian City.The results show that the dust pollution in spring and winter in Putian City is relatively heavy,while the dust pollution in summer and autumn is relatively light;the highest dust fall occurred in February 2023 and the lowest in June 2022;the descending order of dust fall in each county and district is Licheng District>Hanjiang District>Chengxiang District>Xiuyu District>Xianyou County;the sources of dust are basically the same as those of inhalable particulate matter and fine particulate matter;there is a basic negative correlation between dust fall and precipitation,and a certain positive correlation with wind speed.