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Revisiting the effectiveness of HCHO NO2 ratios for

Revisiting the effectiveness of HCHO NO2 ratios for

Using satellite data, we are able to estimate the emissions of NO x (NO x =NO+NO 2), a toxic group of air pollutants, in the Seoul metropolitan area.We first develop an enhanced satellite product that better observes NO 2 in urban regions. Using this new product, we derive NO x emissions to be twice as large as the emissions reported by the South Korean government.

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