气候变化领域集成服务门户(CCPortal): Postglacial response of Arctic Ocean gas hydrates to climatic amelioration

CCPortal

DOI	10.1073/pnas.1619288114
	Postglacial response of Arctic Ocean gas hydrates to climatic amelioration
	Serov P.; Vadakkepuliyambatta S.; Mienert J.; Patton H.; Portnov A.; Silyakova A.; Panieri G.; Carroll M.L.; Carroll J.; Andreassen K.; Hubbard A.
发表日期	2017
ISSN	0027-8424
起始页码	6215
结束页码	6220
卷号	114 期号:24
英文摘要	Seafloor methane release due to the thermal dissociation of gas hydrates is pervasive across the continental margins of the Arctic Ocean. Furthermore, there is increasing awareness that shallow hydrate-related methane seeps have appeared due to enhanced warming of Arctic Ocean bottom water during the last century. Although it has been argued that a gas hydrate gun could trigger abrupt climate change, the processes and rates of subsurface/ atmospheric natural gas exchange remain uncertain. Here we investigate the dynamics between gas hydrate stability and environmental changes from the height of the last glaciation through to the present day. Using geophysical observations from offshore Svalbard to constrain a coupled ice sheet/gas hydrate model, we identify distinct phases of subglacial methane sequestration and subsequent release on ice sheet retreat that led to the formation of a suite of seafloor domes. Reconstructing the evolution of this dome field, we find that incursions of warm Atlantic bottom water forced rapid gas hydrate dissociation and enhanced methane emissions during the penultimate Heinrich event, the Bølling and Allerød interstadials, and the Holocene optimum. Our results highlight the complex interplay between the cryosphere, geosphere, and atmosphere over the last 30,000 y that led to extensive changes in subseafloor carbon storage that forced distinct episodes of methane release due to natural climate variability well before recent anthropogenic warming.
英文关键词	Arctic ocean; Climate change; Gas hydrate; Methane release
语种	英语
scopus关键词	methane; water; Arctic; Article; carbon storage; climate change; cryosphere; dissociation; environmental change; evolution; geographic and geological parameters; glaciation; greenhouse effect; Holocene; ice sheet; model; priority journal; sea; Svalbard and Jan Mayen
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158895
作者单位	Serov, P., Department of Geology, Environment and Climate, Centre for Arctic Gas Hydrate, University of Tromsø -Arctic University of Norway, Tromsø, 9037, Norway; Vadakkepuliyambatta, S., Department of Geology, Environment and Climate, Centre for Arctic Gas Hydrate, University of Tromsø -Arctic University of Norway, Tromsø, 9037, Norway; Mienert, J., Department of Geology, Environment and Climate, Centre for Arctic Gas Hydrate, University of Tromsø -Arctic University of Norway, Tromsø, 9037, Norway; Patton, H., Department of Geology, Environment and Climate, Centre for Arctic Gas Hydrate, University of Tromsø -Arctic University of Norway, Tromsø, 9037, Norway; Portnov, A., Department of Geology, Environment and Climate, Centre for Arctic Gas Hydrate, University of Tromsø -Arctic University of Norway, Tromsø, 9037, Norway; Silyakova, A., Department of Geology, Environment and Climate, Centre for Arctic Gas Hydrate, University of Tromsø -Arctic University of Norway, Tromsø, 9037, Norway; Panieri, G., Depart...
推荐引用方式 GB/T 7714	Serov P.,Vadakkepuliyambatta S.,Mienert J.,et al. Postglacial response of Arctic Ocean gas hydrates to climatic amelioration[J],2017,114(24).
APA	Serov P..,Vadakkepuliyambatta S..,Mienert J..,Patton H..,Portnov A..,...&Hubbard A..(2017).Postglacial response of Arctic Ocean gas hydrates to climatic amelioration.Proceedings of the National Academy of Sciences of the United States of America,114(24).
MLA	Serov P.,et al."Postglacial response of Arctic Ocean gas hydrates to climatic amelioration".Proceedings of the National Academy of Sciences of the United States of America 114.24(2017).