globalchange  > 气候变化与战略
DOI: 10.1038/s41561-021-00714-3
论文题名:
Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion
作者: Bufe A.; Hovius N.; Emberson R.; Rugenstein J.K.C.; Galy A.; Hassenruck-Gudipati H.J.; Chang J.-M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期:4
起始页码: 211
结束页码: 216
语种: 英语
英文关键词: carbon dioxide ; Cenozoic ; chemical reaction ; chemical weathering ; erosion rate ; metasediment ; phyllosilicate ; silicate ; solubility ; sulfide ; sulfuric acid ; Taiwan
英文摘要: Global climate is thought to be modulated by the supply of minerals to Earth’s surface. Whereas silicate weathering removes carbon dioxide (CO2) from the atmosphere, weathering of accessory carbonate and sulfide minerals is a geologically relevant source of CO2. Although these weathering pathways commonly operate side by side, we lack quantitative constraints on their co-variation across erosion rate gradients. Here we use stream-water chemistry across an erosion rate gradient of three orders of magnitude in shales and sandstones of southern Taiwan, and find that sulfide and carbonate weathering rates rise with increasing erosion, while silicate weathering rates remain steady. As a result, on timescales shorter than marine sulfide compensation (approximately 106–107 years), weathering in rapidly eroding terrain leads to net CO2 emission rates that are at least twice as fast as CO2 sequestration rates in slow-eroding terrain. We propose that these weathering reactions are linked and that sulfuric acid generated from sulfide oxidation boosts carbonate solubility, whereas silicate weathering kinetics remain unaffected, possibly due to efficient buffering of the pH. We expect that these patterns are broadly applicable to many Cenozoic mountain ranges that expose marine metasediments. © 2021, The Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169726
Appears in Collections:气候变化与战略

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作者单位: GFZ German Research Centre for Geosciences, Telegrafenberg, Potsdam, Germany; Institute of Geosciences, University of Potsdam, Potsdam, Germany; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Geosciences, Colorado State University, Fort Collins, CO, United States; Centre de Recherches Pétrographiques et Géochimiques, CNRS, Université de Lorraine, Nancy, France; Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Department of Geosciences, National Taiwan University, Taipei, Taiwan

Recommended Citation:
Bufe A.,Hovius N.,Emberson R.,et al. Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion[J]. Nature Geoscience,2021-01-01,14(4)
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