Abstract:OMI (Ozone Monitoring Instrument) on abroad the EOS AURA satellite is widely used to observe the trace gases (O3, NO2, SO2) for its high spatial and temporal resolution. The distribution of NO2 column concentration over Lanzhou was reconstructed using data from OMI database (2010~2012), following the analysis of variation of spatial and temporal patterns, and the estimation of NOx emissions when considering the distribution of NO2 concentration under south-western wind. The results shown that: in the spatial pattern, the NO2 column concentration at the center of Lanzhou City was the highest, and the concentration of NO2 decreased with the distance from the center. In the time pattern, the NO2 column concentration of Lanzhou City reached the highest value in December, and the lowest value in August. The lifetime of NO2 in Lanzhou during wintertime from 2010 to 2012 was about 10.6, 9.9, 9.1h respectively, and the NOx emission rate was about 175.3, 183.7, 179.9mol/s respectively. The emission rate calculated matched the data provided by the “Lanzhou Environment Bulletin”, which indicated that analyzing the distribution of NO2 under special wind direction provides a feasible way to estimate the emissions of NOx.
张杰, 李昂, 谢品华, 徐晋, 王杨, 吴丰成, 牟福生. 基于卫星数据研究兰州市NO2时空分布特征以及冬季NOx排放通量[J]. 中国环境科学, 2015, 35(8): 2291-2297.
ZHANG Jie, LI Ang, XIE Pin-Hua, XU Jin, WANG Yang, WU Feng-Cheng, MOU Fu-Sheng. Research on the spatial/temporal patterns of NO2 concentration and NOx emissions of Lanzhou by applying satellite data. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2291-2297.