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An estimate on the rainout of atmospheric CO2
Abstract： The CO2 in the atmosphere is in contact with water vapor and rain droplets forming CO2 · H2O, HCO-3 and C2-3 . Global precipitation is about 505 x 1015 kg/a. Based on theoretical calculation for unpolluted air and measurement observations, we estimated that 100-270 x 1012 gC/a are scavenged from the air by global precipitation. This roughly equals carbon emissions from volcanic sources or 2-6 per cent of current CO2 emissions. An inventory-based estimate on carbon removal in northwestern Europe supports the above calculation on global scale. With increasing CO2 concentration in the air, precipitation scavenging may increase. 作 者： LIU Chun-jiang Hannu Ilvesniemi Werner Kutsch MA Xiang-qing Carl J.Westman Pekka Kauppi 作者单位： LIU Chun-jiang(Ecology Center, University of Kiel, Schauenburgerstr 112, DE-24118 Kiel, Germany;Department of Forest Ecology, 00014 University of Helsinki, Finland)Hannu Ilvesniemi,Carl J.Westman(Department of Forest Ecology, 00014 University of Helsinki, Finland)
Werner Kutsch(Ecology Center, University of Kiel, Schauenburgerstr 112, DE-24118 Kiel, Germany)
MA Xiang-qing(Forestry College, Fujian Agriculture and Forestry University, Nanping 353001, China)
Pekka Kauppi(Department of Environmental Protection, 00014 University of Helsinki, Finland)
期 刊： 环境科学学报(英文版) ISTICSCI Journal： JOURNAL OF ENVIRONMENTAL SCIENCES 年，卷(期)： 2004, 16(1) 分类号： X131 Keywords： atmospheric CO2 dissolution dissociation precipitation scavenging rainwater