Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1702953114 |
Glacial weathering, sulfide oxidation, and global carbon cycle feedbacks | |
Torres, Mark A.1,2,3; Moosdorf, Nils1,4,5; Hartmann, Jens4; Adkins, Jess F.2; West, A. Joshua1 | |
2017-08-15 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:33页码:8716-8721 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | Connections between glaciation, chemical weathering, and the global carbon cycle could steer the evolution of global climate over geologic time, but even the directionality of feedbacks in this system remain to be resolved. Here, we assemble a compilation of hydrochemical data from glacierized catchments, use this data to evaluate the dominant chemical reactions associated with glacial weathering, and explore the implications for long-term geochemical cycles. Weathering yields from catchments in our compilation are higher than the global average, which results, in part, from higher runoff in glaciated catchments. Our analysis supports the theory that glacial weathering is characterized predominantly by weathering of trace sulfide and carbonate minerals. To evaluate the effects of glacial weathering on atmospheric pCO(2), we use a solute mixing model to predict the ratio of alkalinity to dissolved inorganic carbon (DIC) generated by weathering reactions. Compared with nonglacial weathering, glacial weathering is more likely to yield alkalinity/DIC ratios less than 1, suggesting that enhanced sulfide oxidation as a result of glaciation may act as a source of CO2 to the atmosphere. Back-of-the-envelope calculations indicate that oxidative fluxes could change ocean-atmosphere CO2 equilibrium by 25 ppm or more over 10 ky. Over longer timescales, CO2 release could act as a negative feedback, limiting progress of glaciation, dependent on lithology and the concentration of atmospheric O-2. Future work on glaciation- weathering-carbon cycle feedbacks should consider weathering of trace sulfide minerals in addition to silicate minerals. |
英文关键词 | weathering carbon cycle glaciation oxidation sulfide |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407610400051 |
WOS关键词 | EOCENE-OLIGOCENE TRANSITION ; ATMOSPHERIC CO2 CONCENTRATIONS ; ICE-CORE ; ANTARCTIC GLACIATION ; SOLUTE ACQUISITION ; PYRITE OXIDATION ; RIVER CHEMISTRY ; EROSION ; RATES ; CLIMATE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204763 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA 90089 USA; 2.CALTECH, Dept Geol & Planetary Sci, Pasadena, CA 91125 USA; 3.Rice Univ, Dept Earth Environm & Planetary Sci, Houston, TX 77005 USA; 4.Univ Hamburg, Ctr Earth Syst Res & Sustainabil CEN, Inst Geol, D-20146 Hamburg, Germany; 5.Leibniz Ctr Trop Marine Res, D-28359 Bremen, Germany |
推荐引用方式 GB/T 7714 | Torres, Mark A.,Moosdorf, Nils,Hartmann, Jens,et al. Glacial weathering, sulfide oxidation, and global carbon cycle feedbacks[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(33):8716-8721. |
APA | Torres, Mark A.,Moosdorf, Nils,Hartmann, Jens,Adkins, Jess F.,&West, A. Joshua.(2017).Glacial weathering, sulfide oxidation, and global carbon cycle feedbacks.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(33),8716-8721. |
MLA | Torres, Mark A.,et al."Glacial weathering, sulfide oxidation, and global carbon cycle feedbacks".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.33(2017):8716-8721. |
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