| 摘要: |
| 为研究云贵高原城市遵义新冠期间大气污染物变化特征，利用2015—2020年遵义市空气质量监测数据、地面气象观测资料，分析新冠肺炎疫情防控期间遵义市主要大气污染物和气象要素的变化情况，研究空气质量对污染物减排和气象要素变化的响应。结果表明：疫情防控导致遵义市PM2.5、PM10和NO2质量浓度明显下降，但O3质量浓度小幅增加；PM2.5和NO2对人为减排的响应更敏感；防控期内遵义市气象条件比较有利于污染物的清除，防控减排措施导致PM2.5质量浓度下降25.34%。在疫情防控的背景下，O3浓度较2015—2019年明显偏高，PM2.5显著下降，这与疫情防控期间人员车辆外出明显减少有关，导致夜间滴定消耗O3的气体减少。减排措施对防控期间颗粒物污染浓度有明显的削弱作用。 |
| 关键词: 新冠疫情；气象要素；大气污染物；遵义市 |
| DOI： |
| 投稿时间：2021-05-22 |
| 基金项目: |
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| Changes of Air Pollutants during COVID-19 Duration in Zunyi city |
| SHANG Yuanyuan,PENG Bo,JIN Fanqi,HUANG Jianfei |
| (Guizhou Meteorological Service Center, Guiyang 550002 , China;Guizhou Ecological Meteorology and Satellite Remote Sensing Center,Guiyang 550002 , China) |
| Abstract: |
| In order to study the variation characteristics of air pollutants in Zunyi city of Yunnan Guizhou Plateau during the period of COVID-19 occurrence, the air quality monitoring data and surface meteorological observation of Zunyi from 2015 to 2020 were used to analyse the changes of Zunyi City main air pollutants and meteorological elements during the epidemic prevention and control period and study the response of air quality to pollutant emission reduction and meteorological factors.The results show that:epidemic prevention and control leads to the fact that the mass concentrations of PM2.5, PM10 and NO2 decreased significantly, but the mass concentration of O3 increased slightly;The response of PM2.5 and NO2 to human emission reduction was more sensitive. During the period of prevention and control, the meteorological conditions of Zunyi were conducive to the removal of pollutants. And the PM2.5 mass concentration decreased by 25.34% due to prevention and control measures. Under the background of epidemic prevention and control, O3 concentration was obviously higher and PM2.5 decreased significantly compared with 2015—2019,Which was related to the obvious reduction of people and vehicles going out during lockdown period, resulting in the reduction of gas consumption of O3 at night. Emission reduction measures have a significant weakening effect on the concentration of particulate matter pollution during the prevention and control period. |
| Key words: COVID-19；meteorological elements；air pollutants；Zunyi City |
