气候变化领域集成服务门户(CCPortal): Negligible atmospheric release of methane from decomposing hydrates in mid-latitude oceans

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DOI	10.1038/s41561-022-01044-8
	Negligible atmospheric release of methane from decomposing hydrates in mid-latitude oceans
	Joung, DongJoo; Ruppel, Carolyn; Southon, John; Weber, Thomas S.; Kessler, John D.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	885
结束页码	+
卷号	15 期号:11 页码:16
英文摘要	Naturally occurring gas hydrates may contribute to a positive feedback for global warming because they sequester large amounts of the potent greenhouse gas methane in ice-like deposits that could be destabilized by increasing ocean/atmospheric temperatures. Most hydrates occur within marine sediments; gas liberated during the decomposition of seafloor hydrates or originating with other methane pools can feed methane emissions at cold seeps. Regardless of the origin of seep methane, all previous measurements of methane emitted from seeps have shown it to have a unique fossil radiocarbon signature, contrasting with other sources of marine methane. Here we present the concentration and natural radiocarbon content of methane dissolved in the water column from the seafloor to the sea surface at seep fields along the US Atlantic and Pacific margins. For shallower water columns, where the seafloor is not within the hydrate stability zone, we do document seep CH4 in some surface-water samples. However, measurements in deeper water columns along the US Atlantic margin reveal no evidence of seep CH4 reaching surface waters when the water-column depth is greater than 430 +/- 90 m. Gas hydrates exist only at water depths greater than similar to 550 m in this region, suggesting that the source of methane escaping to the atmosphere is not from hydrate decomposition.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000869337700002
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/272514
作者单位	University of Rochester; Pusan National University; United States Department of the Interior; United States Geological Survey; University of California System; University of California Irvine
推荐引用方式 GB/T 7714	Joung, DongJoo,Ruppel, Carolyn,Southon, John,et al. Negligible atmospheric release of methane from decomposing hydrates in mid-latitude oceans[J],2022,15(11):16.
APA	Joung, DongJoo,Ruppel, Carolyn,Southon, John,Weber, Thomas S.,&Kessler, John D..(2022).Negligible atmospheric release of methane from decomposing hydrates in mid-latitude oceans.NATURE GEOSCIENCE,15(11),16.
MLA	Joung, DongJoo,et al."Negligible atmospheric release of methane from decomposing hydrates in mid-latitude oceans".NATURE GEOSCIENCE 15.11(2022):16.