摘要
本文基于OMI遥感数据,详细分析了近十一年间珠三角对流层NO_2柱浓度时空变化格局,结果表明:(1)珠三角对流层NO_2柱浓度年均下降率为4.25%。2015年浓度最低,为508.83×1013mole/cm^2;2007年最高,为819.37×1013mole/cm^2。2010年较2005年下降12.11%,2015年较2010年下降26.28%;(2)珠三角对流层NO_2柱浓度分布呈中间高、周边低的趋势。中部的广州、佛山、东莞、中山、深圳市等发达或重工业城市为中心的区域是高浓度中心;肇庆、惠州、江门和珠海处于一、二级较低浓度水平;(3)对流层NO_2柱浓度月均值呈显著年度周期性变化,一年中NO_2最低值一般出现在6-9月;最高值一般出现在1、2、11、12月。
Based on satellite derived NO2 column data from OMI,we analysed the characteristics of spatial and temporal distribution of tropospheric NO2 column density over Pearl River Delta from 2005 to 2015. Results demonstrate：（ 1）Tropospheric NO2 column density decreased at the annual rate of 4. 25%,with the lowest column density 508. 83× 10^13 mole /cm2 in the year 2015,and with the highest column density 819. 37 × 10^13 mole / cm2 in the year 2007; it declined 12. 11%compared with 2005 in 2010 and declined 26. 28% compared with 2010 in 2015;（ 2） Tropospheric NO2 column density is high in the middle and low in the surrounding of Pearl River Delta;（ 3） The monthly mean value of tropospheric NO2 column density has significant cyclical change for years. The monthly mean value of June to September is usually low,and that of November to February is usually high.
出处
《环境与可持续发展》
2016年第5期33-36,共4页
Environment and Sustainable Development
基金
高分辨率对地观测系统重大专项(编号:05-Y20A16-9001-15/17)
国家自然科学基金(编号:41271349)
关键词
对流层NO2
OMI
遥感监测
时空变化
珠三角
Tropospheric NO2 column density
OMI
satellite remote sensing monitoring
spatial-temporal change
Pearl River Delta
