【摘 要】
：
Surface OH radical concentration in Beijing City was measured by impregnated filter trapping technique-high performance liquid chromatography (IFT-HPLC). The ob
【机 构】
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State Key Laboratory of Environmental Simulation and Pollution Control,Department of Meteorology
论文部分内容阅读
Surface OH radical concentration in Beijing City was measured by impregnated filter trapping technique-high performance liquid chromatography (IFT-HPLC). The observed concentration of OH radical showed obvious diurnal and seasonal variations, with maximum readings at noon or afternoon, ～80×106OH/cm3 in summer and ～20×106-40×106OH/cm3 in fall. On the basis of measured data, the reaction rates related to the photochemical process of Hox (OH+HO2) were derived and characteristics of atmospheric chemical processes in the city were analyzed. The results showed that conversion rates of atmospheric OH and HO2 in the summer of Beijing City were air of the city mainly originated from the photolysis of the gaseous HNO2, and the main sink of OH were the photochemical reactions with VOCs, NO2, HCHO and CO. It was different from the clean area.
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