气候变化领域集成服务门户(CCPortal): Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism

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DOI	10.1038/s41561-022-01115-w
	Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism
	Jones, Matthew M.; Sageman, Bradley B.; Selby, David; Jacobson, Andrew D.; Batenburg, Sietske J.; Riquier, Laurent; MacLeod, Kenneth G.; Huber, Brian T.; Bogus, Kara A.; Tejada, Maria Luisa G.; Kuroda, Junichiro; Hobbs, Richard W.
发表日期	2023
ISSN	1752-0894
EISSN	1752-0908
起始页码	169
结束页码	+
卷号	16 期号:2 页码:19
英文摘要	Large-igneous-province volcanic activity during the mid-Cretaceous triggered a global-scale episode of reduced marine oxygen levels known as Oceanic Anoxic Event 2 approximately 94.5 million years ago. It has been hypothesized that this geologically rapid degassing of volcanic carbon dioxide altered seawater carbonate chemistry, affecting marine ecosystems, geochemical cycles and sedimentation. Here we report on two sites drilled by the International Ocean Discovery Program offshore of southwest Australia that exhibit clear evidence for suppressed pelagic carbonate sedimentation in the form of a stratigraphic interval barren of carbonate minerals, recording ocean acidification during the event. We then use the osmium isotopic composition of bulk sediments to directly link this protracted similar to 600 kyr shoaling of the marine calcite compensation depth to the onset of volcanic activity. This decrease in marine pH was prolonged by biogeochemical feedbacks in highly productive regions where elevated heterotrophic respiration added carbon dioxide to the water column. A compilation of mid-Cretaceous marine stratigraphic records reveals a contemporaneous decrease of sedimentary carbonate content at continental slope sites globally. Thus, we contend that changes in marine carbonate chemistry are a primary ecological stress and important consequence of rapid emission of carbon dioxide during many large-igneous-province eruptions in the geologic past.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000916034400001
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/272631
作者单位	Northwestern University; Smithsonian Institution; Smithsonian National Museum of Natural History; Durham University; University of Barcelona; Centre National de la Recherche Scientifique (CNRS); UDICE-French Research Universities; Sorbonne Universite; University of Missouri System; University of Missouri Columbia; University of Birmingham; University of Exeter; Japan Agency for Marine-Earth Science & Technology (JAMSTEC); University of Tokyo
推荐引用方式 GB/T 7714	Jones, Matthew M.,Sageman, Bradley B.,Selby, David,et al. Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism[J],2023,16(2):19.
APA	Jones, Matthew M..,Sageman, Bradley B..,Selby, David.,Jacobson, Andrew D..,Batenburg, Sietske J..,...&Hobbs, Richard W..(2023).Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism.NATURE GEOSCIENCE,16(2),19.
MLA	Jones, Matthew M.,et al."Abrupt episode of mid-Cretaceous ocean acidification triggered by massive volcanism".NATURE GEOSCIENCE 16.2(2023):19.