能见度与NO_x、NO_2日变化关系分析研究

NO_2和NO是大气中主要的含氮污染物,我们通常将二者统称为氮氧化物(NO_x)。研究发现,NO_2气体对可见光会产生吸收作用,因此本研究对NO_2和NO_x的日变化特征进行了简要分析。氮氧化物的人为源主要是燃料的燃烧过程所产生的污染。因此燃烧污染源也可分为流动燃烧污染源和固定燃烧污染源,城市大气中的NO_x约1/3来自固定源的排放,而来自汽车等流动污染源的排放高达2/3。

NO2 and NO are the main nitrogen pollutants in the atmosphere.It is found that NO2 gas absorbs visible light,so the diurnal variation characteristics of NO2 and NOX are briefly analyzed in this study.The main anthropogenic source of nitrogen oxides is the pollution caused by the combustion of fuel.Therefore,combustion pollution sources can also be divided into flow combustion sources and fixed combustion sources.About 1/3 of NOX in the urban atmosphere comes from the emissions from fixed sources,while the emissions from mobile sources such as automobiles are as high as 2/3.