Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr
The sea-surface bioproductivity changes over the last 25 kyr were inferred from published data on 30 sediment cores from the open Northwest Pacific (NWP), Sea of Okhotsk, Bering Sea and Sea of Japan accounting for the glacioeustatic sea-level changes. A novel method was developed to compare the vari...
Published in: | Oceanology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Pleiades Publishing, Springer
2014
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Online Access: | https://oceanrep.geomar.de/id/eprint/28590/ https://oceanrep.geomar.de/id/eprint/28590/1/Ovsepyan_et_al-2014-Oceanology-Sea-surface_bioproductivity.pdf https://doi.org/10.1134/S0001437014040080 |
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ftoceanrep:oai:oceanrep.geomar.de:28590 2023-05-15T15:42:52+02:00 Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr Ovsepyan, E. A. Ivanova, E. V. Murdmaa, L. O. Alekhina, G. N. 2014 text https://oceanrep.geomar.de/id/eprint/28590/ https://oceanrep.geomar.de/id/eprint/28590/1/Ovsepyan_et_al-2014-Oceanology-Sea-surface_bioproductivity.pdf https://doi.org/10.1134/S0001437014040080 en eng Pleiades Publishing, Springer https://oceanrep.geomar.de/id/eprint/28590/1/Ovsepyan_et_al-2014-Oceanology-Sea-surface_bioproductivity.pdf Ovsepyan, E. A., Ivanova, E. V., Murdmaa, L. O. and Alekhina, G. N. (2014) Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr. Oceanology, 54 (4). pp. 505-518. DOI 10.1134/S0001437014040080 <https://doi.org/10.1134/S0001437014040080>. doi:10.1134/S0001437014040080 cc_by_nc_3.0 info:eu-repo/semantics/embargoedAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1134/S0001437014040080 2023-04-07T15:18:57Z The sea-surface bioproductivity changes over the last 25 kyr were inferred from published data on 30 sediment cores from the open Northwest Pacific (NWP), Sea of Okhotsk, Bering Sea and Sea of Japan accounting for the glacioeustatic sea-level changes. A novel method was developed to compare the variations of several independent productivity proxies relative to the present-day values. During the Last Glacial Maximum, the bioproductivity in the Sea of Okhotsk and the western Bering Sea (BS) was lower than at present, whereas the southern and southeastern Bering Sea and the open NWP are characterized by enhanced bioproductivity. During the early deglacial stage, an increase in bioproductivity was estimated only for the southeastern Bering Sea. High and fairly high bioproductivity was estimated for Heinrich 1 in the open NWP, above the Umnak Plateau and on the Shirshov and Bowers Ridges in the Bering Sea. The high productivity in the Bering Sea, Sea of Okhotsk and NWP during the Bølling/Allerød was caused by the global warming and enhanced nutrient supply by meltwater from the continent. During the Early Holocene, high productivity was estimated for almost the entire NWP. The Late Holocene sea-surface bioproductivity was generally lower than that of the Early Holocene. Proposed factors that have controlled the sea-surface bioproductivity during the last 25 kyr include: the location of the sea ice margin, the river runoff, gradual flooding of the Bering Sea and the Sea of Okhotsk shelf areas, the water mass exchange between the marginal seas and the open NWP, the eolian supply and the deep vertical mixing of the water column. Article in Journal/Newspaper Bering Sea Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Bering Sea Bowers ENVELOPE(164.083,164.083,-85.000,-85.000) Okhotsk Pacific Umnak Plateau ENVELOPE(-170.250,-170.250,54.250,54.250) Oceanology 54 4 505 518 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The sea-surface bioproductivity changes over the last 25 kyr were inferred from published data on 30 sediment cores from the open Northwest Pacific (NWP), Sea of Okhotsk, Bering Sea and Sea of Japan accounting for the glacioeustatic sea-level changes. A novel method was developed to compare the variations of several independent productivity proxies relative to the present-day values. During the Last Glacial Maximum, the bioproductivity in the Sea of Okhotsk and the western Bering Sea (BS) was lower than at present, whereas the southern and southeastern Bering Sea and the open NWP are characterized by enhanced bioproductivity. During the early deglacial stage, an increase in bioproductivity was estimated only for the southeastern Bering Sea. High and fairly high bioproductivity was estimated for Heinrich 1 in the open NWP, above the Umnak Plateau and on the Shirshov and Bowers Ridges in the Bering Sea. The high productivity in the Bering Sea, Sea of Okhotsk and NWP during the Bølling/Allerød was caused by the global warming and enhanced nutrient supply by meltwater from the continent. During the Early Holocene, high productivity was estimated for almost the entire NWP. The Late Holocene sea-surface bioproductivity was generally lower than that of the Early Holocene. Proposed factors that have controlled the sea-surface bioproductivity during the last 25 kyr include: the location of the sea ice margin, the river runoff, gradual flooding of the Bering Sea and the Sea of Okhotsk shelf areas, the water mass exchange between the marginal seas and the open NWP, the eolian supply and the deep vertical mixing of the water column. |
format |
Article in Journal/Newspaper |
author |
Ovsepyan, E. A. Ivanova, E. V. Murdmaa, L. O. Alekhina, G. N. |
spellingShingle |
Ovsepyan, E. A. Ivanova, E. V. Murdmaa, L. O. Alekhina, G. N. Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr |
author_facet |
Ovsepyan, E. A. Ivanova, E. V. Murdmaa, L. O. Alekhina, G. N. |
author_sort |
Ovsepyan, E. A. |
title |
Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr |
title_short |
Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr |
title_full |
Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr |
title_fullStr |
Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr |
title_full_unstemmed |
Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr |
title_sort |
sea-surface bioproductivity changes in the northwest pacific over the last 25 kyr |
publisher |
Pleiades Publishing, Springer |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/28590/ https://oceanrep.geomar.de/id/eprint/28590/1/Ovsepyan_et_al-2014-Oceanology-Sea-surface_bioproductivity.pdf https://doi.org/10.1134/S0001437014040080 |
long_lat |
ENVELOPE(164.083,164.083,-85.000,-85.000) ENVELOPE(-170.250,-170.250,54.250,54.250) |
geographic |
Bering Sea Bowers Okhotsk Pacific Umnak Plateau |
geographic_facet |
Bering Sea Bowers Okhotsk Pacific Umnak Plateau |
genre |
Bering Sea Sea ice |
genre_facet |
Bering Sea Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/28590/1/Ovsepyan_et_al-2014-Oceanology-Sea-surface_bioproductivity.pdf Ovsepyan, E. A., Ivanova, E. V., Murdmaa, L. O. and Alekhina, G. N. (2014) Sea-surface bioproductivity changes in the Northwest Pacific over the last 25 kyr. Oceanology, 54 (4). pp. 505-518. DOI 10.1134/S0001437014040080 <https://doi.org/10.1134/S0001437014040080>. doi:10.1134/S0001437014040080 |
op_rights |
cc_by_nc_3.0 info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1134/S0001437014040080 |
container_title |
Oceanology |
container_volume |
54 |
container_issue |
4 |
container_start_page |
505 |
op_container_end_page |
518 |
_version_ |
1766376832476643328 |