| 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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| 引用本文：覃小群,刘朋雨,黄奇波,张连凯.2013.珠江流域岩石风化作用消耗大气/土壤CO2量的估算[J].地球学报,34(4):455-462. |
| DOI：10.3975/cagsb.2013.04.08 |
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| 基金项目:中国地质调查局地质调查项目(编号: 1212011087121) |
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| 中文摘要:以流域的岩性、径流量和水化学分析数据为主要资料, 利用基于GIS空间分析的GEM-CO2模型, 估算珠江流域陆地岩石风化作用消耗大气/土壤空气中的CO2, 评价河流流域的碳汇能力。结果表明, 珠江流域因岩石溶蚀和风化作用消耗大气/土壤中的CO2量为252×109 mol?a-1 (571×103 mol?km-2?a-1), 从岩性分析, 碳酸盐岩区大气/土壤CO2消耗量为180×109 mol?a-1 (1030×103 mol?km-2?a-1), 占总量的71.4%。二级流域以西江流域CO222 |
| 中文关键词:碳汇 二氧化碳 珠江流域 |
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| Estimation of Atmospheric/Soil CO2 Consumption by Rock Weathering in the Pearl River Valley |
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| Abstract: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. |
| keywords:carbon sink carbon dioxide the Pearl River Valley |
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