Abstract
Surface OH radical concentration in Bei**g City was measured by impregnated filter trap** 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 Bei**g City were about 700×106 molecule/(cm3·s) and 600×106molecule/(cm3·s), respectively. And the net production of OH in the air of the city mainly originate 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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Foundation item: Under the auspices of the National Natural Science Foundation of China (No. 40075026)
Biography: REN xin-rong (1973 -), male, a native of Zhejiang Province, Ph. D., now a postdoctorship in Pennsylvania State University, USA, specialized in the reaction kinetics of atmospheric environment. E-mail: ren@essc.psu.edu
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Ren, Xr., Wang, Lx., Wang, Hx. et al. Conversion rates of surface HOx radicals in Bei**g City. Chin. Geograph.Sc. 14, 34–38 (2004). https://doi.org/10.1007/s11769-004-0006-2
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DOI: https://doi.org/10.1007/s11769-004-0006-2