Data/hora: 13/06/2024 07:11:52

Provedor de dados: 	5	
País: 	France	
Título: 	Climatically driven emissions of hydrocarbons from marine sediments during deglaciation	
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.	
Data: 	2006-09	
Ano: 	2006	
Palavras-chave: 	Methane; Paleoclimate; Quaternary climate; Hydrate; Tar.	
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.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	https://archimer.ifremer.fr/doc/00234/34524/33432.pdf

DOI:10.1073/pnas.0601304103

https://archimer.ifremer.fr/doc/00234/34524/	
Editor: 	Natl Acad Sciences	
Formato: 	application/pdf	
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	
Fonte: 	2006 by The National Academy of Sciences of the USA

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