气候变化领域集成服务门户(CCPortal): Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera

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DOI	10.1016/j.gloplacha.2019.103049
	Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera
	Zhang, Qinghai; Ding, Lin; Kitajima, Kouki; Valley, John W.; Zhang, Bo; Xu, Xiaoxia; Willems, Helmut; Kluegel, Andreas
通讯作者	Zhang, QH (通讯作者)
发表日期	2020
ISSN	0921-8181
EISSN	1872-6364
卷号	184
英文摘要	The Paleocene-Eocene thermal maximum (PETM) was an extraordinary pulse of global warming that left an indelible mark on the Earth approximately 56 Ma ago. This warming event is associated with an addition of large amounts of C-13-depleted carbon into the atmosphere-ocean system, but the magnitude of the negative carbon isotope excursion (CIE) signaling the PETM onset and often used to estimate mass of the released carbon is still debated. Here we gauge the CIE magnitude through the use of secondary ion mass spectrometry (SIMS) to perform in situ delta C-13 measurements within individual larger benthic foraminifera preserved in a tropical shallow-marine limestone section at Tingri, south Tibet. This SIMS-based delta C-13 record yields a CIE (Delta similar to 7 parts per thousand) comparable in magnitude to that registered by some terrestrial PETM records but larger than the similar to 4 parts per thousand CIE returned by surface-dwelling planktonic foraminifera in deep-sea records. We posit that the CIE magnitude in the surface ocean and atmosphere was similar to 7 parts per thousand, and that previous similar to 4 parts per thousand estimates are attenuated by incomplete preservation and/or diagenetic overprinting. Mass balance calculations indicate that the released carbon mass during the CIE would not exceed 28,000 petagrams, given that the carbon was sourced from organic matter, permafrost, thermogenic methane, methane hydrate, or any of their combinations. Our study demonstrates that delta C-13 records from some shallow-marine carbonate sections can avoid strong diagenetic alteration, preserving primary signals of deep-time carbon perturbations.
关键词	EARLY MARINE DIAGENESIS ORGANIC-CARBON CHEMICAL DIAGENESIS ROCK INTERACTION METHANE HYDRATE TRACE-ELEMENT RECORDS SEAWATER DELTA-C-13 CLIMATE
英文关键词	Paleocene-Eocene thermal maximum; CIE magnitude; SIMS; Larger benthic foraminifera; Tibet
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000508491500009
来源期刊	GLOBAL AND PLANETARY CHANGE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259988
推荐引用方式 GB/T 7714	Zhang, Qinghai,Ding, Lin,Kitajima, Kouki,et al. Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera[J]. 中国科学院青藏高原研究所,2020,184.
APA	Zhang, Qinghai.,Ding, Lin.,Kitajima, Kouki.,Valley, John W..,Zhang, Bo.,...&Kluegel, Andreas.(2020).Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera.GLOBAL AND PLANETARY CHANGE,184.
MLA	Zhang, Qinghai,et al."Constraining the magnitude of the carbon isotope excursion during the Paleocene-Eocene thermal maximum using larger benthic foraminifera".GLOBAL AND PLANETARY CHANGE 184(2020).