Photolysis rate data set of Xianghe

Photolysis rate is the key parameter to reflect the characteristics of air compound pollution in China, and it is the hub of the interaction of different pollutants. The photolysis rate of NO2 is one of the key factors affecting the formation of tropospheric ozone. However, the interaction between photolysis rate and aerosol and the contribution of photolysis rate to the formation of ozone and secondary aerosol are still lack of in-depth research. Based on Xianghe station, the simultaneous observation of photochemical radiation flux and solar radiation was carried out. Using the observed data and radiative transfer model, the reconstruction method of photolysis rate is systematically constructed, and has good regional applicability. The effect of aerosols on J (NO2) was evaluated through the long-term high-quality photolysis rate from 2005 to 2019. The attenuation effect of aerosols on the photolysis rate showed a downward trend, and the average attenuation rate of aerosols on J (NO2) was - 28.6%; J (NO2) has shown an obvious upward trend since 2013. The average increase of O (3P) produced by NO2 photolysis is 1.1 * 10-3 ppb • S-1 / year. The research results will provide scientific support for the study of photochemical pollution mechanism and the formation of secondary aerosols in this area. The research results were published on Atmospheric Research and were supported by the national key R & D plan (2017yfc0210003) and the strategic pilot project of Chinese Academy of Sciences (xda19020303). The data set belongs to SDG11 indicator type.