Environmental change in the Sea of Okhotsk during the last 1.1 million years
On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size r...
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Amer Geophysical Union
2004
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Online Access: | https://archimer.ifremer.fr/doc/00228/33934/32231.pdf https://doi.org/10.1029/2004PA001023 https://archimer.ifremer.fr/doc/00228/33934/ |
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ftarchimer:oai:archimer.ifremer.fr:33934 2023-05-15T18:17:03+02:00 Environmental change in the Sea of Okhotsk during the last 1.1 million years Nurnberg, D Tiedemann, R 2004-11 application/pdf https://archimer.ifremer.fr/doc/00228/33934/32231.pdf https://doi.org/10.1029/2004PA001023 https://archimer.ifremer.fr/doc/00228/33934/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00228/33934/32231.pdf doi:10.1029/2004PA001023 https://archimer.ifremer.fr/doc/00228/33934/ Copyright 2004 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Paleoceanography (0883-8305) (Amer Geophysical Union), 2004-11 , Vol. 19 , N. PA4011 , P. 1-23 Sea of Okhotsk paleoproductivity terrigenous flux sea ice dynamics stratigraphy text Publication info:eu-repo/semantics/article 2004 ftarchimer https://doi.org/10.1029/2004PA001023 2021-09-23T20:25:14Z On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record ( China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure cell. During full glacial times our records point to a strong Siberian High causing northerly wind directions, the extension of the sea ice cover, and a reduced Amur River discharge. Deglacial maxima of terrigenous flux were succeeded by or synchronous to high-productivity events. Marine productivity was strengthened during glacial terminations because of an effective nutrient utilization at times of enhanced water column stratification and high nutrient supply from fluvial runoff and sea ice thawing. During interglacials, SE monsoonal winds prevailed, analogous to today's summer situation of a pronounced Mongolian Heat Low and a strong Hawaiian High. Strong freshwater discharge induced by high precipitation rates in the Amur drainage area and a seasonally reduced and mobile sea ice cover favored marine productivity ( although being considerably lower than during the terminations) and a lowered flux of ice-rafted detritus. Article in Journal/Newspaper Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Okhotsk Paleoceanography 19 4 n/a n/a |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Sea of Okhotsk paleoproductivity terrigenous flux sea ice dynamics stratigraphy |
spellingShingle |
Sea of Okhotsk paleoproductivity terrigenous flux sea ice dynamics stratigraphy Nurnberg, D Tiedemann, R Environmental change in the Sea of Okhotsk during the last 1.1 million years |
topic_facet |
Sea of Okhotsk paleoproductivity terrigenous flux sea ice dynamics stratigraphy |
description |
On the basis of two sedimentary records from the central Sea of Okhotsk, we reconstruct the closely coupled glacial/interglacial changes in terrigenous flux, marine productivity, and sea ice coverage over the past 1.1 Myr. The correspondance of our sedimentary records to the China loess grain size record ( China loess particle timescale, CHILOPARTS) suggests that environmental changes in both the Sea of Okhotsk area and in SE Asia were closely related via the Siberian atmospheric high-pressure cell. During full glacial times our records point to a strong Siberian High causing northerly wind directions, the extension of the sea ice cover, and a reduced Amur River discharge. Deglacial maxima of terrigenous flux were succeeded by or synchronous to high-productivity events. Marine productivity was strengthened during glacial terminations because of an effective nutrient utilization at times of enhanced water column stratification and high nutrient supply from fluvial runoff and sea ice thawing. During interglacials, SE monsoonal winds prevailed, analogous to today's summer situation of a pronounced Mongolian Heat Low and a strong Hawaiian High. Strong freshwater discharge induced by high precipitation rates in the Amur drainage area and a seasonally reduced and mobile sea ice cover favored marine productivity ( although being considerably lower than during the terminations) and a lowered flux of ice-rafted detritus. |
format |
Article in Journal/Newspaper |
author |
Nurnberg, D Tiedemann, R |
author_facet |
Nurnberg, D Tiedemann, R |
author_sort |
Nurnberg, D |
title |
Environmental change in the Sea of Okhotsk during the last 1.1 million years |
title_short |
Environmental change in the Sea of Okhotsk during the last 1.1 million years |
title_full |
Environmental change in the Sea of Okhotsk during the last 1.1 million years |
title_fullStr |
Environmental change in the Sea of Okhotsk during the last 1.1 million years |
title_full_unstemmed |
Environmental change in the Sea of Okhotsk during the last 1.1 million years |
title_sort |
environmental change in the sea of okhotsk during the last 1.1 million years |
publisher |
Amer Geophysical Union |
publishDate |
2004 |
url |
https://archimer.ifremer.fr/doc/00228/33934/32231.pdf https://doi.org/10.1029/2004PA001023 https://archimer.ifremer.fr/doc/00228/33934/ |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
Paleoceanography (0883-8305) (Amer Geophysical Union), 2004-11 , Vol. 19 , N. PA4011 , P. 1-23 |
op_relation |
https://archimer.ifremer.fr/doc/00228/33934/32231.pdf doi:10.1029/2004PA001023 https://archimer.ifremer.fr/doc/00228/33934/ |
op_rights |
Copyright 2004 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2004PA001023 |
container_title |
Paleoceanography |
container_volume |
19 |
container_issue |
4 |
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n/a |
op_container_end_page |
n/a |
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1766191060904574976 |