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REN Xin-rong, WANG Li-xin, WANG Hui-xiang, MIAO Guo-fang. CONVERSION RATES OF SURFACE HOX RADICALS IN BEIJING CITY[J]. Chinese Geographical Science, 2004, 14(1): 34-38.
Citation: REN Xin-rong, WANG Li-xin, WANG Hui-xiang, MIAO Guo-fang. CONVERSION RATES OF SURFACE HOX RADICALS IN BEIJING CITY[J]. Chinese Geographical Science, 2004, 14(1): 34-38.
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CONVERSION RATES OF SURFACE HOX RADICALS IN BEIJING CITY

  • 1.

    State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, P. R. China;

  • 2.

    Department of Meteorology, Pennsylvania State University, PA 16802, USA

  • Received Date: 2003-08-25
  • Publish Date: 2004-03-20
  • 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 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 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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    沈阳化工大学材料科学与工程学院 沈阳 110142

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CONVERSION RATES OF SURFACE HOX RADICALS IN BEIJING CITY

  • 1. State Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences, Peking University, Beijing 100871, P. R. China;
  • 2. Department of Meteorology, Pennsylvania State University, PA 16802, USA
  • Received Date: 2003-08-25
  • Publish Date: 2004-03-20

Abstract: 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 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 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.

REN Xin-rong, WANG Li-xin, WANG Hui-xiang, MIAO Guo-fang. CONVERSION RATES OF SURFACE HOX RADICALS IN BEIJING CITY[J]. Chinese Geographical Science, 2004, 14(1): 34-38.
Citation: REN Xin-rong, WANG Li-xin, WANG Hui-xiang, MIAO Guo-fang. CONVERSION RATES OF SURFACE HOX RADICALS IN BEIJING CITY[J]. Chinese Geographical Science, 2004, 14(1): 34-38.
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