Estimation of Atmospheric/Soil CO2 Consumption by Rock Weathering in the Pearl River Valley
详细信息
- 责任者：Qin Xiaoqun (Institute of Karst Geology ; Chinese Academy of Geological Sciences ; Guilin 541004 ; China) ; Liu Pengyu
- 刊名：Acta Geoscientica Sinica
- 出版年：2013
- 卷期：34(4)
- 关键词：风化作用 ; weathering ; 二氧化碳 ; carbon dioxide ; 珠江 ; Zhujiang River
- 页码：p.455-462
- 图表：4 illus., 8 tables, 18 refs.
- 分类号：0600
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
The atmospheric/soil CO 2 consumption by rock weathering has become the main carbon sink.The flux of CO 2 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 CO 2 consumed by chemical erosion of continental rocks in the Pearl River Valley based on a global erosion model(GEM-CO 2) developed by Amiotte Suchet.The total carbon consumption is about 252×10 9 mol.a-1(571×10 3 mol.km-2.a-1),about 71.4% of which are caused by carbonate rocks,with about 180×10 9 mol.a-1(1030×10 3 mol km-2.a-1) CO 2 consumed flux.About 79.4% of the consumption of CO 2 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 CO 2 consumption amount respectively.The flux of atmospheric/soil CO 2 consumed in the Pearl River Valley is 2.3 times higher than the average CO 2 consumption of the major river basins in the world.
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