王政

摘 要：本文利用驻马店市空气质量监测数据和气象观测数据，对比分析2020年上半年与2019年同期的气象条件，得出2020年上半年驻马店市污染物扩散和湿沉降气象条件与2019年同期相比略偏好。其间分析了4—6月臭氧污染气象条件，2020年较2019年同期略微偏差，但是大气中臭氧前体物排放源减少（2020年NO2浓度较2019年同期明显偏低），这是2020年4月以来驻马店市达到臭氧污染轻度及以上的日数较2019年同期偏少、臭氧浓度较2019年偏低的主要原因。2020年上半年EMI指数整体较2019年同期偏低，2020年上半年气象条件与2019年同期相比整体偏好。

关键词：气象条件;颗粒物浓度;臭氧浓度;对比

中图分类号：X51文献标识码：A文章编号：1003-5168（2021）04-0141-03

Abstract： This paper used the air quality monitoring data and meteorological observation data of Zhumadian City to compare and analyze the meteorological conditions in the first half of 2020 and the same period in 2019， and concluded that the meteorological conditions of pollutant diffusion and wet deposition in Zhumadian City in the first half of 2020 were slightly preferred compared with the same period in 2019. During this period， the meteorological conditions of ozone pollution from April to June were analyzed， 2020 was slightly deviated from the same period in 2019， but the emission sources of ozone precursors in the atmosphere were reduced （NO2 concentration in 2020 is significantly lower than in the same period in 2019）， which was the main reason why the number of days in Zhumadian City to reach mild ozone pollution or above since April 2020 was less than the same period in 2019， and the ozone concentration was lower than in 2019. The overall EMI index in the first half of 2020 was lower than the same period in 2019， compared with the same period in 2019， the weather conditions were generally good in the first half of 2020.

Keywords： meteorological conditions;particulate matter concentration;ozone concentration;comparison

随着经济的发展，大气污染问题得到越来越多的关注。大气污染是一种复杂的现象，污染物浓度受到很多因素的影响，大气污染物的扩散与气象条件密切相关。近年来，国内关于大气污染的研究有很多，研究发现，空气质量与气象条件关系密切，气温、风向、风速、降水和相对湿度等气象要素对污染物浓度变化具有一定的影响[1-5]。2020上半年驻马店市空气质量较2019年同期明显变好，这与年初驻马店市在疫情管控的作用下污染物排放源的减少有关，由于空气质量与气象条件也密切相关，为探究2020年上半年大气污染气象条件对空气质量的改善是否有利，本文利用驻马店市空气质量监测数据和气象观测数据，对比2020年上半年与2019年同期的气象条件，定性分析空气质量改善的原因。……