Direct measurements of the rate of NO2 photolysis to NO and O(3P) are reported as photolysis frequencies J (NO2) for Mexico City. These frequencies were measured using a flow reactor, where a known concentration of NO2 was photolysed for different experimental exposure times. UV radiation was measured with an Eppley UV radiometer. Comparisons with calculated values using a radiation transfer model, and Madronich's formula are shown (Refer to PDF file for exact formulas).

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The authors want to thank Alfredo Rodriguez for his help in designing and building the equipment used in this research. This work has been supported by Instituto Mexicano del Petroleo and Direccion General de Asuntos del Personal Academico, UNAM.ISSN:0187-6236 Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works in February 2014.

Document Type


Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)


RIT – Main Campus