基于MODIS数据的豫北气溶胶时空变化特征及疫情影响分析  

Spatial and Temporal Variation Characteristics of Aerosols in Northern Henan Based on MODIS Data and the Influence of COVID-19

作　　者：康涵书 唐琪 杨磊库[1] Kang Hanshu;Tang Qi;Yang Leiku(School of Surveying and Landing Information Engineering of Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454003

出　　处：《气象与环境科学》2023年第2期36-42,共7页Meteorological and Environmental Sciences

基　　金：国家自然科学基金项目(41975036、4191101440)。

摘　　要：利用2010—2020年的MYD04_3K气溶胶光学厚度(AOD)产品,进行波段提取、重投影、镶嵌和裁剪等预处理,从月均、季均和年均3个时间尺度分析了豫北AOD的时空分布特征。结果表明:2010—2019年豫北年均AOD为0.517~0.776,在2011年达到峰值,2010—2016年呈波动下降趋势,2016年之后呈稳定趋势。夏季AOD均值最大,秋季的最小。夏季AOD与夏季降水量负相关,夏季AOD年际变化最大。豫北年均AOD空间分布呈现出东高西低、南高北低的特征。夏季高值区主要分布在焦作市和新乡市,冬季高值区主要分布在新乡市和鹤壁市。2015—2020年春节,豫北AOD和NO_(2)相关性较好,2020年春节AOD和NO_(2)明显降低,AOD高值区域大面积减少,疫情期间空气质量得到较大改善,随着复工复产,AOD逐渐升高。In this paper,we employ the MYD04_3K aerosol optical thickness(AOD)products in 20102020 and perform preprocessing steps such as band extraction,reprojection,mosaic and clipping.We also analyze the spatio-temporal distribution characteristics of AOD in northern Henan from 3 time scales:monthly average,seasonal average and annual average.The results show that the annual average AOD in northern Henan ranged from 0.517 to 0.776 during 20102019,with the peak value appearing in 2011.From 2010 to 2016,it had a fluctuating downward trend but a stable trend after 2016.The seasonal average AOD is the highest in summer and the lowest in autumn.There is a negative correlation between summer AOD and summer precipitation,and the interannual variation of summer AOD was the largest.The spatial distribution of AOD in northern Henan shows a pattern of high values in the east and low values in the west,as well as high values in the south and low values in the north.In summer,the high-value areas are mainly distributed in Jiaozuo city and Xinxiang city,while in winter,they are mainly distributed in Xinxiang city and Hebi city.During the Spring Festivals in 20152020,there was a good correlation between AOD and NO_(2) in northern Henan.However,due to the impact of the epidemic(COVID-19),AOD and NO_(2) decreased significantly during the Spring Festival of 2020,when AOD high-value areas were largely reduced,and air quality was greatly improved.Then,with the resumption of work and production,AOD gradually increased again.

关 键 词：气溶胶光学厚度 时空分布 疫情影响 

分 类 号：X513[环境科学与工程—环境工程]