| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Climatically driven emissions of hydrocarbons from marine sediments during deglaciation
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| Autores: |
Hill, T. M.
Kennett, J. P.
Valentine, D. L.
Yang, Z.
Reddy, C. M.
Nelson, R. K.
Behl, R. J.
Robert, C.
Beaufort, L.
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| Data: |
2006-09
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| Ano: |
2006
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| Palavras-chave: |
Methane
Paleoclimate
Quaternary climate
Hydrate
Tar
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| Resumo: |
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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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00234/34524/33432.pdf
DOI:10.1073/pnas.0601304103
https://archimer.ifremer.fr/doc/00234/34524/
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| Editor: |
Natl Acad Sciences
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| Formato: |
application/pdf
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| Fonte: |
Proceedings Of The National Academy Of Sciences Of The United States Of America (0027-8424) (Natl Acad Sciences), 2006-09 , Vol. 103 , N. 37 , P. 13570-13574
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| Direitos: |
2006 by The National Academy of Sciences of the USA
info:eu-repo/semantics/openAccess
restricted use
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