An estimate on the rainout of atmospheric CO_2  

作　　者：LIUChun-jiang HannuIlvesniemi WernerKutsch MAXiang-qing CarlJ.Westman PekkaKauppi 

机构地区：[1]EcologyCenter,UniversityofKiel,Schauenburgerstr112,DE-24118Kiel,Germany [2]DepartmentofForestEcology,00014UniversityofHelsinki,Finland [3]ForestryCollege,FujianAgricultureandForestryUniversity,Nanping353001,China [4]DepartmentofEnvironmentalProtection,00014UniversityofHelsinki,Finland

出　　处：《Journal of Environmental Sciences》2004年第1期86-89,共4页环境科学学报（英文版）

摘　　要：The CO_2 in the atmosphere is in contact with water vapor and rain droplets forming CO_2·H_2O, HCO -_3 and CO 2- _3. Global precipitation is about 505×10 15 kg/a. Based on theoretical calculation for unpolluted air and measurement observations, we estimated that 100—270×10 12 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 CO_2 emissions. An inventory-based estimate on carbon removal in northwestern Europe supports the above calculation on global scale. With increasing CO_2 concentration in the air, precipitation scavenging may increase.The CO_2 in the atmosphere is in contact with water vapor and rain droplets forming CO_2·H_2O, HCO -_3 and CO 2- _3. Global precipitation is about 505×10 15 kg/a. Based on theoretical calculation for unpolluted air and measurement observations, we estimated that 100—270×10 12 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 CO_2 emissions. An inventory-based estimate on carbon removal in northwestern Europe supports the above calculation on global scale. With increasing CO_2 concentration in the air, precipitation scavenging may increase.

关 键 词：atmospheric CO_2 DISSOLUTION DISSOCIATION precipitation scavenging RAINWATER 

分 类 号：X517[环境科学与工程—环境工程]