Stable Isotopes and Bayesian Tracer Mixing Model Reveal Chemical Weathering and CO2 Release in the Jiulongjiang River Basin, Southeast China
文献类型：期刊论文
| 作者 | Liu, Jinke1; Han, Guilin1; Zhang, Qian2; Liu, Man1; Li, Xiaoqiang1 |
| 刊名 | WATER RESOURCES RESEARCH
 |
| 出版日期 | 2022-09-01 |
| 卷号 | 58期号:9页码:18 |
| ISSN号 | 0043-1397 |
| DOI | 10.1029/2021WR031738 |
| 通讯作者 | Han, Guilin(hanguilin@cugb.edu.cn) |
| 英文摘要 | Links between erosion, chemical weathering, and atmospheric CO2 can modulate the global climate over geologic times, but the role of chemical weathering on Earth's long-term carbon cycle is still unclear. Although silicate weathering by carbonic acid could sequester CO2, the pyrite oxidation coupled to carbonate dissolution could provide a transient source of CO2 at the same time. Landscapes with low physical erosion rate cover the majority of exposed land area, however, the concomitant weathering of silicate, carbonate, and sulfide occurring in the low erosion rate terrains is not well understood. Here, we investigate these questions by examining the river water chemistry from a catchment characterized by complex lithology and low erosion rate. Using a Bayesian tracer mixing model, elemental and isotopic ratios, we quantitatively identify the proportion of cations from silicate and carbonate weathering as well as the acid sources during weathering. We propose that the sulfuric acid from pyrite oxidation boosts both silicate and carbonate weathering, and the coupling between pyrite oxidation and silicate weathering is more pronounced as the pyrite oxidation rates increases. In doing so we determine the effect of weathering on the CO2 balance in our study area, and find that the CO2 release from pyrite oxidation coupled to carbonate dissolution overwhelms the CO2 drawdown from silicate weathering on the time scale between marine carbonate precipitation and sulfate reduction (approximately 10(6)-10(7) years). Our analysis indicates that the lithology and distribution of minerals play an important role on the chemical weathering in low erosion rate terrains. |
| WOS关键词 | DISSOLVED INORGANIC CARBON ; SULFIDE OXIDATION ; SEASONAL-VARIATIONS ; PYRITE OXIDATION ; TOTAL ALKALINITY ; MAGMA EVOLUTION ; SULFUR ISOTOPES ; MASS-BALANCE ; SILICATE ; CYCLE |
| 资助项目 | National Natural Science Foundation of China[41661144029] ; National Natural Science Foundation of China[41325010] ; China University of Geosciences, Beijing[ZY2021YC007] |
| WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000859894000001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Natural Science Foundation of China ; China University of Geosciences, Beijing |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/185093]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Han, Guilin |
| 作者单位 | 1.China Univ Geosci Beijing, Inst Earth Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jinke,Han, Guilin,Zhang, Qian,et al. Stable Isotopes and Bayesian Tracer Mixing Model Reveal Chemical Weathering and CO2 Release in the Jiulongjiang River Basin, Southeast China[J]. WATER RESOURCES RESEARCH,2022,58(9):18. |
| APA | Liu, Jinke,Han, Guilin,Zhang, Qian,Liu, Man,&Li, Xiaoqiang.(2022).Stable Isotopes and Bayesian Tracer Mixing Model Reveal Chemical Weathering and CO2 Release in the Jiulongjiang River Basin, Southeast China.WATER RESOURCES RESEARCH,58(9),18. |
| MLA | Liu, Jinke,et al."Stable Isotopes and Bayesian Tracer Mixing Model Reveal Chemical Weathering and CO2 Release in the Jiulongjiang River Basin, Southeast China".WATER RESOURCES RESEARCH 58.9(2022):18. |
入库方式： OAI收割
来源：地理科学与资源研究所
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