| 辽河流域岩石风化速率及碳汇计算 |
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| 引用本文： | 彭弋倪,陈旸,李石磊. 辽河流域岩石风化速率及碳汇计算[J]. 延边大学学报(自然科学版), 2017, 0(3): 439-449 |
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| 作者姓名： | 彭弋倪 陈旸 李石磊 |
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| 作者单位： | 1.南京大学 表生地球化学教育部重点实验室,江苏 南京 210023; 2.南京大学 地球科学与工程学院,江苏 南京 210023; 3.江苏省气候变化协同创新中心,江苏 南京 210023 |
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| 摘 要： | 岩石风化是全球碳循环的重要碳汇过程。以辽河流域为研究对象,采用水化学与元素地球化学方法,从河流水化学角度对整个辽河流域的岩石风化过程进行研究。在对流域干流和主要支流河水以及水库水的水化学特征进行统计分析后,通过正演方法计算发现,辽河流域河水化学组成主要由岩石风化主导,岩石风化以碳酸盐岩风化为主,但受到人类活动(畜牧业、农业、工业等)的影响很大。辽河流域碳酸盐岩风化速率为每年12.99 t·km-2,硅酸盐岩风化速率为每年2.27 t·km-2,岩石风化速率小于大陆河流平均水平。辽河流域碳酸盐岩风化CO2消耗通量为每年14.66×109mol,硅酸盐岩风化CO2消耗通量为每年6.40×109 mol,都小于世界大部分大陆河流。
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| 关 键 词： | 地表风化 水化学 元素地球化学 正演方法 人类活动 风化速率 2消耗通量CO2消耗通量 辽河流域 |
Rock Weathering Rates and Carbon Sink Calculation in Liaohe River Watershed,China |
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| PENG Yi-ni,CHEN Yang,LI Shi-lei. Rock Weathering Rates and Carbon Sink Calculation in Liaohe River Watershed,China[J]. Journal of Yanbian University (Natural Science), 2017, 0(3): 439-449 |
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| Authors: | PENG Yi-ni CHEN Yang LI Shi-lei |
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| Affiliation: | 1. Key Laboratory of Surficial Geochemistry of Ministry of Education, Nanjing University, Nanjing 210023, Jiangsu, China; 2. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, Jiangsu, China; 3. Jiangsu Collaborative Innovation Center for Climate Change, Nanjing 210023, Jiangsu, China |
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| Abstract: | Rock weathering is an important carbon sink process in global carbon cycle. The rock weathering process in Liaohe river watershed was studied with the methods of water chemistry and element geochemistry. The hydrochemical characteristics of main river and reservoir waters in Liaohe river watershed were analyzed. Based on the forward method model, the chemical composition of river water in Liaohe river watershed is dominated by rock weathering, which is mainly affected by carbonate weathering and human activities(livestock breeding, agriculture, industry, etc.). The carbonate weathering rate in Liaohe river watershed is 12.99 t·km-2 per year, The silicate weathering rate is 2.27 t·km-2 per year, and the rock weathering rate is less than the average of global main river watersheds. The CO2 consumption by carbonate weathering is 14.66×109 mol per year, and that by silicate weathering is 6.40×109 mol per year, which both are lower than that of global most river watersheds. |
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| Keywords: | weathering water chemistry element geochemistry forward modeling method human activity weathering rate 2 consumption flux of CO2 consumption Liaohe river watershed |
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