基于OMI数据的河南省近十年大气对流层NO2垂直柱浓度时空变化分析研究

摘要

文章利用OMI卫星全球对流层NO2垂直柱浓度Level3级产品数据,研究分析了河南省2006年-2015年大气对流层NO2垂直柱浓度时空变化规律.结果表明:河南省近10年大气对流层平均NO2柱浓度为15.38×1015 molec/cm2,远高于全国平均水平,但自2014年起出现了大幅回落;NO2柱浓度月均值具有对称性和周期性,最高值和最低值一般分别出现在1月和7月;NO2柱浓度的季节均值特征明显,具体表现为冬季>秋季>春季>夏季;河南省NO2柱浓度空间分布不均衡,自西南部至东北部逐渐增加,其中东北部为NO2浓度高值集中地区.%This paper researched and analysed the tropospheric NO2 vertical column density of temporal and spatial changes in Henan province from 2006 to 2015, with OMI data product as source data. The results showed that the average NO2 column density in Henan province was 15. 38 × 1015 molec/cm2 in recent 10 years, much more than the national average, but since 2014 there has been a substantial decline. The monthly mean value of NO2 column density had symmetry and periodicity, usually the highest mean value appeared in January and lowest appearedinJuly. The mean value of NO2 column densitieshad obviously seasonal char-acteristics, whichwas winter mean> autumn mean> spring mean> summer mean. The spatial distribution of NO2 column densi-ties in Henan province was not balanced, with anincreasing trend from the southwest to the northeast.