摘要
日益突出的臭氧(O_3)污染已成为继PM2. 5之后我国大气污染防治的又一艰巨任务。由于氮氧化物(NO_x)、挥发性有机物(VOCs)这2种前体物的减排难度较大,且与O_3浓度存在复杂的非线性关系,准确获取O_3及NO_x、VOCs的时空分布对制定有效的防控措施至关重要。基于卫星遥感可定量反演O_3及2种前体物的代表性物种——二氧化氮(NO_2)、甲醛(HCHO)及乙二醛(C_2H_2O_2)的时空分布信息。面向区域O_3污染分析和防控应用,综述了卫星遥感对O_3及NO_2、HCHO、C_2H_2O_2的探测能力,以及利用遥感手段分析区域O_3及其前体物的传输。进而从O_3与NO_x、VOCs关系的角度,分析了利用卫星反演的前体物表征O_3生成风险的可行性。最后对卫星在区域O_3及其前体物监测方面的前景趋势提出了思考。
The increasingly prominent ozone(O_3) pollution is the second most arduous task of air pollution control after PM2. 5 in China. Considering that the emission reduction of nitrogen oxides(NO_x) and volatile organic compounds(VOCs) is difficult,and there is a complex nonlinear relationship with O_3,so it is important to accurately obtain the spatial and temporal distribution of O_3,NO_x and VOCs for the formulation of effective prevention and control measures. The spatial and temporal distribution of O_3 and two representative species of precursors,nitrogen dioxide(NO_2),formaldehyde(HCHO) and glyoxal(C_2H_2O_2),can be retrieved quantitatively based on satellite remote sensing. Focused on the analysis and control of regional ozone pollution,this paper summarized the detection ability of satellite remote sensing to O_3,NO_2,HCHO and C_2H_2O_2,and analyzed the transport of regional O_3 and its precursors by remote sensing. The feasibility of using satellite inversion precursors to characterize O_3 generation risk was analyzed from the perspective of the relationship between O_3-NO_x-VOCs. Finally,the future trend of satellite in regional O_3 and precursor monitoring was discussed.
引文
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