Climatically driven emissions of hydrocarbons from marine sediments during deglaciation

Hill  TM; Kennett  JP; Valentine  DLYang  ZReddy  CMNelson  RKBehl  RJRobert  CBeaufort  L

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Climatically driven emissions of hydrocarbons from marine sediments during deglaciation

机译：Climatically driven emissions of hydrocarbons from marine sediments during deglaciation

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Marine hydrocarbon seepage emits oil and gas, including methane (approximate to 30 Tg of CH4 per year), to the ocean and atmosphere. Sediments from the California margin contain preserved tar, primarily formed through hydrocarbon weathering at the sea surface. We present a record of variation in the abundance of tar in sediments for the past 32,000 years, providing evidence for increases in hydrocarbon emissions before and during Termination IA 16,000 years ago (16 ka) to 14 ka and again over Termination IB (11-10 ka). Our study provides direct evidence for increased hydrocarbon seepage associated with deglacial warming through tar abundance in marine sediments, independent of previous geochemical proxies. Climate-sensitive gas hydrates may modulate thermogenic hydrocarbon seepage during deglaciation.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2006年第37期|13570-13574|共5页
作者
Hill TM; Kennett JP; Valentine DLYang ZReddy CMNelson RKBehl RJRobert CBeaufort L;
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作者单位

Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 USA;

Univ Calif Santa Barbara, Inst Marine Sci, Santa Barbara, CA 93106 USA;

Woods Hole Oceanog Inst, Marine Chem & Geochem Dept, Woods Hole, MA 02543 USACalif State Univ Long Beach, Dept Geol Sci, Long Beach, CA 90840 USAEuropean Mediterraneen Arbois, Ctr Europeen Rech & Enseignement Geosci Environm, UMR 6635, CNRS, F-13545 Aix En Provence 4, France;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
methane; paleoclimate; quaternary climate; hydrate; tar; SANTA-BARBARA CHANNEL; COAL OIL POINT; ATMOSPHERIC METHANE; SEA-LEVEL; CALIFORNIA; BASIN; SEEPS; GAS; MIGRATION; EVENTS;

Climatically driven emissions of hydrocarbons from marine sediments during deglaciation

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