气候变化领域集成服务门户(CCPortal): Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion

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DOI	10.1038/s41561-021-00714-3
	Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion
	Bufe A.; Hovius N.; Emberson R.; Rugenstein J.K.C.; Galy A.; Hassenruck-Gudipati H.J.; Chang J.-M.
发表日期	2021
ISSN	17520894
起始页码	211
结束页码	216
卷号	14 期号:4
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).
英文关键词	carbon dioxide; Cenozoic; chemical reaction; chemical weathering; erosion rate; metasediment; phyllosilicate; silicate; solubility; sulfide; sulfuric acid; Taiwan
语种	英语
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206870
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
推荐引用方式 GB/T 7714	Bufe A.,Hovius N.,Emberson R.,et al. Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion[J],2021,14(4).
APA	Bufe A..,Hovius N..,Emberson R..,Rugenstein J.K.C..,Galy A..,...&Chang J.-M..(2021).Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion.Nature Geoscience,14(4).
MLA	Bufe A.,et al."Co-variation of silicate, carbonate and sulfide weathering drives CO2 release with erosion".Nature Geoscience 14.4(2021).