Environmental change in the Sea of Okhotsk during the past 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...
Published in: | Paleoceanography |
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Language: | English |
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AGU (American Geophysical Union)
2004
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Online Access: | https://oceanrep.geomar.de/id/eprint/5380/ https://oceanrep.geomar.de/id/eprint/5380/7/palo1151.pdf http://www.agu.org/pubs/crossref/2004/2004PA001023.shtml https://doi.org/10.1029/2004PA001023 |
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ftoceanrep:oai:oceanrep.geomar.de:5380 2023-05-15T18:17:16+02:00 Environmental change in the Sea of Okhotsk during the past 1.1 million years Nürnberg, Dirk Tiedemann, Ralf 2004 text https://oceanrep.geomar.de/id/eprint/5380/ https://oceanrep.geomar.de/id/eprint/5380/7/palo1151.pdf http://www.agu.org/pubs/crossref/2004/2004PA001023.shtml https://doi.org/10.1029/2004PA001023 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/5380/7/palo1151.pdf Nürnberg, D. and Tiedemann, R. (2004) Environmental change in the Sea of Okhotsk during the past 1.1 million years. Open Access Paleoceanography, 19 (PA4011). DOI 10.1029/2004PA001023 <https://doi.org/10.1029/2004PA001023>. doi:10.1029/2004PA001023 info:eu-repo/semantics/openAccess Article PeerReviewed 2004 ftoceanrep https://doi.org/10.1029/2004PA001023 2023-04-07T14:50:54Z 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Okhotsk Paleoceanography 19 4 n/a n/a |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
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 |
Nürnberg, Dirk Tiedemann, Ralf |
spellingShingle |
Nürnberg, Dirk Tiedemann, Ralf Environmental change in the Sea of Okhotsk during the past 1.1 million years |
author_facet |
Nürnberg, Dirk Tiedemann, Ralf |
author_sort |
Nürnberg, Dirk |
title |
Environmental change in the Sea of Okhotsk during the past 1.1 million years |
title_short |
Environmental change in the Sea of Okhotsk during the past 1.1 million years |
title_full |
Environmental change in the Sea of Okhotsk during the past 1.1 million years |
title_fullStr |
Environmental change in the Sea of Okhotsk during the past 1.1 million years |
title_full_unstemmed |
Environmental change in the Sea of Okhotsk during the past 1.1 million years |
title_sort |
environmental change in the sea of okhotsk during the past 1.1 million years |
publisher |
AGU (American Geophysical Union) |
publishDate |
2004 |
url |
https://oceanrep.geomar.de/id/eprint/5380/ https://oceanrep.geomar.de/id/eprint/5380/7/palo1151.pdf http://www.agu.org/pubs/crossref/2004/2004PA001023.shtml https://doi.org/10.1029/2004PA001023 |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/5380/7/palo1151.pdf Nürnberg, D. and Tiedemann, R. (2004) Environmental change in the Sea of Okhotsk during the past 1.1 million years. Open Access Paleoceanography, 19 (PA4011). DOI 10.1029/2004PA001023 <https://doi.org/10.1029/2004PA001023>. doi:10.1029/2004PA001023 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2004PA001023 |
container_title |
Paleoceanography |
container_volume |
19 |
container_issue |
4 |
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n/a |
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1766191384980619264 |