中国二氧化氮浓度分布特征及其驱动因素分析

Analysis of Distribution Characteristics and Driving Factors of Nitrogen Dioxide Concentration in China

基于OMI卫星遥感数据,采用趋势分析和相关分析法研究了我国对流层二氧化氮柱浓度2005-2019年时空分布特征及其驱动因素分析,发现在空间上我国二氧化氮浓度多年来呈现出“东高西低”的分布特征,且浓度高值区范围先扩张后缩小,东部地区15年来的浓度空间变化比西部地区的变化大;时间上二氧化氮浓度除了2008年外总体呈先升高后下降的变化趋势,2005-2010年间天津、辽宁、山东、湖北等省份二氧化氮浓度增加了70%以上,15年来具有秋冬多、春夏少的季节变化规律。此外,我国二氧化氮浓度分布特征的驱动因素,主要有人口密度、煤炭消费量、汽车保有量以及相关政策等。

Based on OMI satellite remote sensing data,the temporal and spatial distribution characteristics and driving factors of tropospheric nitrogen dioxide column concentration in China from 2005 to 2019 were studied by using trend analysis and correlation analysis methods.It was found that the concentration of nitrogen dioxide in China showed the distribution characteristics of"high in the East and low in the west"for many years,and the range of high concentration area first expanded and then narrowed,while the concentration in the eastern region changed spatially in the past 15 years The nitrogen dioxide concentration in Tianjin,Liaoning,Shandong,Hubei and other provinces increased by more than 70%from 2005 to 2010,with the seasonal variation of more in autumn and winter and less in spring and summer.Besides,the driving factors of nitrogen dioxide concentration distribution in China mainly include population density,coal consumption,car ownership and related policies.