气候变化领域集成服务门户(CCPortal): Consistent CO2 release by pyrite oxidation on continental shelves prior to glacial terminations

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DOI	10.1038/s41561-019-0465-9
	Consistent CO2 release by pyrite oxidation on continental shelves prior to glacial terminations
	Kölling M.; Bouimetarhan I.; Bowles M.W.; Felis T.; Goldhammer T.; Hinrichs K.-U.; Schulz M.; Zabel M.
发表日期	2019
ISSN	17520894
卷号	12 期号:11
英文摘要	Previous evidence suggests enhanced pyrite oxidation on exposed continental shelves during glacial phases of low sea level. While pyrite oxidation directly consumes atmospheric oxygen, acid generated by this reaction should increase the release of CO2 through carbonate dissolution. This scenario represents a climate control loop that could temper or even prevent glacials because increasing CO2 triggers warming and rising sea level. However, the amplitudes of sea-level changes increased over the Quaternary, and CO2 concentrations co-varied with sea level throughout most of the past 800,000 years. Only during peak glacial conditions did CO2 levels reach an apparent lower threshold independent of falling sea level. Here we suggest that during the last nine glacial–interglacial cycles, pyrite-oxidation-driven release of CO2 and consumption of O2 occurred during 10 kyr to 40 kyr periods preceding glacial terminations. We demonstrate that repeated sea-level lowstands force pyrite oxidation to ever-greater depths in exposed shelf sediments and cause CO2 release that could explain the glacial CO2 threshold. When the duration of interglacials with high sea level is insufficient to restock the shelf pyrite inventory, this CO2-releasing process represents a discharging ‘acid capacitor’. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	carbon dioxide; continental shelf; dissolution; glacial-interglacial cycle; oxidation; pyrite; Quaternary; sea level
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/124579
作者单位	MARUM - Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany; Faculté des Sciences Appliquées Ait Melloul, Ibn Zohr University, Agadir, Morocco; LUMCON, DeFelice Marine Center, Chauvin, LA, United States; IGB, Department of Chemical Analytics and Biogeochemistry, Berlin, Germany
推荐引用方式 GB/T 7714	Kölling M.,Bouimetarhan I.,Bowles M.W.,et al. Consistent CO2 release by pyrite oxidation on continental shelves prior to glacial terminations[J],2019,12(11).
APA	Kölling M..,Bouimetarhan I..,Bowles M.W..,Felis T..,Goldhammer T..,...&Zabel M..(2019).Consistent CO2 release by pyrite oxidation on continental shelves prior to glacial terminations.Nature Geoscience,12(11).
MLA	Kölling M.,et al."Consistent CO2 release by pyrite oxidation on continental shelves prior to glacial terminations".Nature Geoscience 12.11(2019).