气候变化领域集成服务门户(CCPortal): Radiocarbon in Marine Methane Reveals Patchy Impact of Seeps on Surface Waters

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DOI	10.1029/2020GL089516
	Radiocarbon in Marine Methane Reveals Patchy Impact of Seeps on Surface Waters
	Joung D.; Leonte M.; Valentine D.L.; Sparrow K.J.; Weber T.; Kessler J.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Geological sources of methane (CH4), such as hydrocarbon seeps, are significant yet poorly constrained sources of CH4 to seawater and the overlying atmosphere. We investigate the radiocarbon content (14C) and concentrations of dissolved CH4 in surface waters from the Coal Oil Point seep field to test the hypothesis that geological sources can dominate the regional background signal of CH4. We find that surface waters with elevated CH4 concentration were populated with seep-CH4 and that lower concentrations of CH4 were well explained by mixing with the regional background of nongeological CH4. Substantial differences in concentration and 14C-CH4 were observed over distances <5 km, demonstrating that surface currents mix background-CH4 into the seep field. These results indicate that even a prolific seep region like the Santa Barbara Basin exerts limited influence on the regional background of CH4 in the surface layer but is a significant driver of patchiness in oceanic CH4 biogeochemistry. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Geology; Methane; Background signals; Coal oil points; Constrained source; Hydrocarbon seeps; Santa Barbara; Surface current; Surface layers; Surface waters; biogeochemistry; concentration (composition); hydrocarbon; methane; radiocarbon dating; seawater; surface layer; surface water; California; Coal Oil Point; Pacific Ocean; Santa Barbara; Santa Barbara Basin; United States
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169562
作者单位	Department of Earth and Environmental Sciences, University of Rochester, Rochester, NY, United States; Department of Earth Science and Marine Science Institute, University of California, Santa Barbara, CA, United States; Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States
推荐引用方式 GB/T 7714	Joung D.,Leonte M.,Valentine D.L.,et al. Radiocarbon in Marine Methane Reveals Patchy Impact of Seeps on Surface Waters[J],2020,47(20).
APA	Joung D.,Leonte M.,Valentine D.L.,Sparrow K.J.,Weber T.,&Kessler J.D..(2020).Radiocarbon in Marine Methane Reveals Patchy Impact of Seeps on Surface Waters.Geophysical Research Letters,47(20).
MLA	Joung D.,et al."Radiocarbon in Marine Methane Reveals Patchy Impact of Seeps on Surface Waters".Geophysical Research Letters 47.20(2020).