宜都市PM2.5与O3季节性分布特征及潜在源区分析
Distribution Characteristics and Potential Source Areas of PM2.5 and O3 in Different Seasons in Yidu City
张嘉迪 1王东旭 1王振楠 1朱汉民 1苏春华 2周磊 2杨喜成2
作者信息
- 1. 中科宇图科技股份有限公司,北京 100101
- 2. 宜昌市生态环境局宜都市分局,湖北 宜都 443300
- 折叠
摘要
为了解宜都市 PM2.5 与 O3 的污染特征及潜在来源,利用宜都市 2020 年 3 月至 2022 年 2 月在线监测数据及气象数据,对宜都市PM2.5 与O3 质量浓度变化特征、气象影响因素及潜在源区进行了分析,结果表明:宜都市PM2.5 质量浓度冬高夏低,日变化呈双峰特征,O3 质量浓度夏高冬低,日变化呈单峰特征.高湿、静稳的气象条件以及较强偏北风作用下的区域污染传输对 PM2.5 污染有重要影响,高温以及中湿度对 O3 污染过程有重要作用.春、夏、秋季偏南方向气流轨迹占主导,且携带较高的污染物浓度,冬季来自湖北东北及西南方向的气流占比较高且携带的 PM2.5 浓度较高;宜都市PM2.5、O3 的潜在源区具有季节性差异,总体来看,主要分布在河南南部、湖北东部及湖南的北部区域.
Abstract
To study the pollution characteristics and potential sources of PM2.5 and O3 in Yidu City in different seasons,using the online monitoring data and meteorological data of Yidu City from March 2020 to February 2022,the seasonal variation characteristics,meteorological influencing factors and potential pollution sources of PM2.5 and O3 mass concentrations in Yidu City were analyzed.The results showed that the diurnal variation of PM2.5 mass concentration in Yidu City showed a bimodal characteristic,and the seasonal variation of concentration was high in winter and low in summer.The diurnal variation of O3 mass concentration showed a unimodal characteristic,and the seasonal variation of concentration was opposite to that of PM2.5.The meteorological conditions of high humidity,static stability and regional pollution transmission of strong northerly wind had important effects on PM2.5 pollution,while high temperature and moderate humidity had important effects on ozone pollution process.Southerly air flow in spring,summer and autumn was dominant and carried higher pollutant concentration.In winter,air flow from northeast and southwest of Hubei province took a higher proportion and carried higher PM2.5 concentration.The potential source areas of PM2.5 and O3 in Yidu city had seasonal differences.Generally speaking,they were mainly distributed in southern Henan Province,eastern Hubei Province and northern Hunan Province.
关键词
宜都市/PM2.5/O3/气象因子/污染特征/后向轨迹/潜在源分析Key words
Yidu City/PM2.5/O3/meteorological factors/pollution characterization/backward trajectories/potential source analysis引用本文复制引用
基金项目
中国工程院咨询项目(2018-ZD-02)
出版年
2024
NETL
NSTL
万方数据