| NUMERICAL SIMULATION OF ATMOSPHERIC METHANE TRENDS OVER THE LAST 150 YEARS |
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| 作者姓名： | 张仁健 王明星 |
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| 作者单位： | State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics.Chinese Academy of Sciences，Beijing 100029，State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry，Institute of Atmospheric Physics.Chinese Academy of Sciences，Beijing 100029 |
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| 基金项目： | This work is financially supported by NKBRSF Project(G1999043400). |
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| 摘 要： | A global two-dimensional chemistry model is developed to study long-term trends of CH_4 sinceindustrial revolution.The sources of CH_4,CO and NO_x are parameterized as functions of latitudeand time.With two long-term emission scenarios,long-term trends of CH_4 are simulated.The resultshave a good agreement with observation from ice cores.The modeled CH_4 increased from 760 ppbvin 1840 to 1611.9 ppbv in 1991, while the modeled number concentration of tropospheric OHdecreased from 7.17×10~5 cm~(-3)in 1840 to 5.79×10~5 cm~(-3) in 1991.The increase of atmosphericCH_4 can be explained by the increase of emission of CH_4 and build-up because of decrease of OHradicals that remove CH_4 from the atmosphere.The model is also used to simulate the distribution of CH_4.Comparisons between the modelresults and observations show that the model can simulate both latitudinal distribution and seasonalvariation of CH_4 well.
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NUMERICAL SIMULATION OF ATMOSPHERIC METHANE TRENDS OVER THE LAST 150 YEARS |
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| ZHANG Renjian WANG Mingxing State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry.NUMERICAL SIMULATION OF ATMOSPHERIC METHANE TRENDS OVER THE LAST 150 YEARS[J].Acta Meteorologica Sinica,2001(1). |
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| Authors: | ZHANG Renjian WANG Mingxing State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry |
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| Institution: | ZHANG Renjian WANG Mingxing State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 |
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| Abstract: | |
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| Keywords: | global two-dimensional chemistry model methane growth rate OH emission |
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