气候变化领域集成服务门户(CCPortal): Methane hydrate dissociation across the Oligocene-Miocene boundary

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DOI	10.1038/s41561-022-00895-5
	Methane hydrate dissociation across the Oligocene-Miocene boundary
	Kim, Bumsoo; Zhang, Yi Ge
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	203
结束页码	+
卷号	15 期号:3 页码:21
英文摘要	Methane hydrate dissociation occurred across the Oligocene-Miocene boundary, which may have contributed to the termination of glaciation, according to analysis of lipid biomarkers from the Southern Ocean. Methane hydrate dissociation has long been considered as a mechanism for global carbon cycle perturbations, climate change and even mass extinctions in Earth's history. However, direct evidence of hydrate destabilization and methane release coinciding with such events is scarce. Here we report the presence of diagnostic lipid biomarkers with depleted carbon isotopes from three sites in the Southern Ocean that are directly linked to methane release and subsequent oxidation across the Oligocene-Miocene boundary (23 million years ago). The biomarker evidence indicates that the hydrate destabilization was initiated during the peak of the Oligocene-Miocene boundary glaciation and sea-level low stand, consistent with our model results suggesting the decrease in hydrostatic pressure eroded the base of global methane hydrate stability zones. Aerobic oxidation of methane in seawater consumes oxygen and acidifies the ocean, acting as a negative feedback that perhaps facilitated the rapid and mysterious termination of glaciation in the early Miocene.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000754941700001
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/272554
作者单位	Texas A&M University System; Texas A&M University College Station
推荐引用方式 GB/T 7714	Kim, Bumsoo,Zhang, Yi Ge. Methane hydrate dissociation across the Oligocene-Miocene boundary[J],2022,15(3):21.
APA	Kim, Bumsoo,&Zhang, Yi Ge.(2022).Methane hydrate dissociation across the Oligocene-Miocene boundary.NATURE GEOSCIENCE,15(3),21.
MLA	Kim, Bumsoo,et al."Methane hydrate dissociation across the Oligocene-Miocene boundary".NATURE GEOSCIENCE 15.3(2022):21.