| 珠江流域岩石风化作用消耗大气/土壤CO2量的估算 |
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| 关键词:carbon sink carbon dioxide the Pearl River Valley |
| 基金项目:中国地质调查局地质调查项目(编号: 1212011087121) |
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| 摘要: |
| Estimation of Atmospheric/Soil CO2 Consumption by Rock Weathering in the Pearl River Valley |
| The atmospheric/soil CO2 consumption by rock weathering has become the main carbon sink. The flux of CO2 consumed by rock weathering increases with the increasing carbonate rock outcrop area and the water drainage intensity. In this paper, with the rock, water runoff and water chemistry data of the valley as the main data, the authors estimated the flux of atmospheric/soil CO2 consumed by chemical erosion of continental rocks in the Pearl River Valley based on a global erosion model (GEM-CO2) developed by Amiotte Suchet. The total carbon consumption is about 252×109 mol?a-1 (571×103 mol?km-2?a-1), about 71.4% of which are caused by carbonate rocks, with about 180×109 mol?a-1 (1030×103 mol km-2?a-1) CO2 consumed flux. About 79.4% of the consumption of CO2 is localized in Xijiang tributary basin, because of a high proportion of carbonate rocks and high humidity in this area. In contrast, the Beijiang tributary basin and the Dongjiang tributary basin only possess 13% and 4.9% of the total CO2 consumption amount respectively. The flux of atmospheric/soil CO2 consumed in the Pearl River Valley is 2.3 times higher than the average CO2 consumption of the major river basins in the world. |
| QIN Xiao-qun,LIU Peng-yu,HUANG Qi-bo,ZHANG Lian-kai.2013.Estimation of Atmospheric/Soil CO2 Consumption by Rock Weathering in the Pearl River Valley[J].Acta Geoscientica Sinica,34(4):455-462. |
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