气候变化领域集成服务门户(CCPortal): Accelerated marine carbon cycling forced by tectonic degassing over the Miocene Climate Optimum

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DOI	10.1016/j.scib.2023.12.052
	Accelerated marine carbon cycling forced by tectonic degassing over the Miocene Climate Optimum
	Liu, Fenghao; Du, Jinlong; Huang, Enqing; Ma, Wentao; Ma, Xiaolin; Tian, Jun; Lourens, Lucas J.
发表日期	2024
ISSN	2095-9273
EISSN	2095-9281
起始页码	69
结束页码	6
卷号	69 期号:6
英文摘要	Global warming during the Miocene Climate Optimum (MCO, -17-14 million years ago) is associated with massive carbon emissions sourced from the flood basalt volcanism and ocean crustal production. However, the perturbation of tectonic carbon degassing on the interaction between climate change and carbon cycle remains unclear. Here, through time-evolutive phase analysis of new and published high-resolution benthic foraminiferal oxygen (618O) and carbon (613C) isotope records from the global ocean, we find that variations in the marine carbon cycle lead the climate-cryosphere system (613Clead-618O) on 405,000-year eccentricity timescales during the MCO. This is in contrast to the previously reported climate-lead-carbon (618O-lead-613C) scenario during most of the Oligo-Miocene (-34-6 million years ago). Further sensitivity analysis and model simulations suggest that the elevated atmospheric CO2 concentrations and the resulting greenhouse effect strengthened the low-latitude hydrological cycle during the MCO, accelerating the response of marine carbon cycle to eccentricity forcing. Tropical climate processes played a more important role in regulating carbon-cycle variations when Earth's climate was in a warm regime, as opposed to the dominant influence of polar ice-sheet dynamics during the PlioPleistocene (after -6 million years ago). (c) 2024 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
英文关键词	Global warming; Eccentricity cycle; Carbon cycle; Low -latitude hydrological cycle
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:001218408500001
来源期刊	SCIENCE BULLETIN
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297698
作者单位	Tongji University; Ministry of Natural Resources of the People's Republic of China; Second Institute of Oceanography, Ministry of Natural Resources; Chinese Academy of Sciences; Institute of Earth Environment, CAS; Utrecht University
推荐引用方式 GB/T 7714	Liu, Fenghao,Du, Jinlong,Huang, Enqing,et al. Accelerated marine carbon cycling forced by tectonic degassing over the Miocene Climate Optimum[J],2024,69(6).
APA	Liu, Fenghao.,Du, Jinlong.,Huang, Enqing.,Ma, Wentao.,Ma, Xiaolin.,...&Lourens, Lucas J..(2024).Accelerated marine carbon cycling forced by tectonic degassing over the Miocene Climate Optimum.SCIENCE BULLETIN,69(6).
MLA	Liu, Fenghao,et al."Accelerated marine carbon cycling forced by tectonic degassing over the Miocene Climate Optimum".SCIENCE BULLETIN 69.6(2024).