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	Provedor de dados ArchiMer (2) Autor Ohkushi, Ken'Ichi (2) Harada, Naomi (1) Ikehara, Ken (1) Ikehara, Minoru (1) Itaki, Takuya (1) Kennett, James P. (1) Nagashima, Kana (1) Rella, Stephan F. (1) Sakamoto, Tatsuhiko (1) Shibahara, Akihiko (1) Tada, Ryuji (1) Uchida, Masao (1) Mais... Palavra-chave Benthic foraminifera (1) Biological production (1) Deglacial (1) Holocene (1) Last glacial (1) Oyashio (1) Paleoceanography (1) Mais... Tipo do documento Text (2) Ano 2012 (1) 2007 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Late Quaternary changes in intermediate water oxygenation and oxygen minimum zone, northern Japan: A benthic foraminiferal perspective ArchiMer Shibahara, Akihiko; Ohkushi, Ken'Ichi; Kennett, James P.; Ikehara, Ken. A strong oxygen minimum zone (OMZ) currently exists at upper intermediate water depths on the northern Japanese margin, NW Pacific. The OMZ results largely from a combination of high surface water productivity and poor ventilation of upper intermediate waters. We investigated late Quaternary history ( last 34 kyr) of ocean floor oxygenation and the OMZ using quantitative changes in benthic foraminiferal assemblages in three sediment cores taken from the continental slope off Shimokita Peninsula and Tokachi, northern Japan, at water depths between 975 and 1363 m. These cores are well located within the present-day OMZ, a region of high surface water productivity, and in close proximity to the source region of North Pacific Intermediate Water. Late... Tipo: Text Palavras-chave: Benthic foraminifera; Paleoceanography; Oyashio; Biological production; Last glacial; Deglacial; Holocene. Ano: 2007 URL: https://archimer.ifremer.fr/doc/00236/34733/33182.pdf Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period ArchiMer Rella, Stephan F.; Tada, Ryuji; Nagashima, Kana; Ikehara, Minoru; Itaki, Takuya; Ohkushi, Ken'Ichi; Sakamoto, Tatsuhiko; Harada, Naomi; Uchida, Masao. Millennial-scale variability in the behavior of North Pacific Intermediate Water during the last glacial and deglacial period, and its association with Dansgaard-Oeschger (D-O) cycles and Heinrich events, are examined based on benthic foraminiferal oxygen and carbon isotopes (delta O-18(bf) and delta C-13(bf)) and %CaCO3 using a sediment core recovered from the northeastern slope of the Bering Sea. A suite of positive delta O-18(bf) excursions at intermediate depths of the Bering Sea, which seem at least in part associated with increases in the delta O-18(bf) gradients between the Bering and Okhotsk Seas, suggest the Bering Sea as a proximate source of intermediate water during several severe stadial episodes in the last glacial and deglacial period.... Tipo: Text Ano: 2012 URL: https://archimer.ifremer.fr/doc/00265/37642/36754.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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