Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period
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 delt...
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Online Access: | https://doi.org/10.1029/2011PA002205 https://archimer.ifremer.fr/doc/00265/37642/36754.pdf https://archimer.ifremer.fr/doc/00265/37642/ |
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fttriple:oai:gotriple.eu:10670/1.q76cpp 2023-05-15T15:42:49+02:00 Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period Rella, Stephan F. Tada, Ryuji Nagashima, Kana Ikehara, Minoru Itaki, Takuya Ohkushi, Ken'Ichi Sakamoto, Tatsuhiko Harada, Naomi Uchida, Masao https://doi.org/10.1029/2011PA002205 https://archimer.ifremer.fr/doc/00265/37642/36754.pdf https://archimer.ifremer.fr/doc/00265/37642/ en eng Amer Geophysical Union doi:10.1029/2011PA002205 10670/1.q76cpp https://archimer.ifremer.fr/doc/00265/37642/36754.pdf https://archimer.ifremer.fr/doc/00265/37642/ other Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2012-07 , Vol. 27 , N. PA3203 , P. 1-18 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1029/2011PA002205 2023-01-22T17:37:48Z 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. Absence of such delta O-18(bf) gradients during periods of high surface productivity in the Bering and Okhotsk Seas, which we correlate to D-O interstadials, suggests a reduction in intermediate water production in the Bering Sea and subsequent introduction of nutrient-rich deep waters from the North Pacific into intermediate depths of the Bering Sea. We argue that a reorganization of atmospheric circulation in the high-latitude North Pacific during severe cold episodes in the last glacial and deglacial period created favorable conditions for brine rejection in the northeastern Bering Sea. The resulting salinity increase in the cold surface waters could have initiated intermediate (and deep) water formation that spread out to the North Pacific. Text Bering Sea Unknown Bering Sea Okhotsk Pacific Paleoceanography 27 3 n/a n/a |
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envir geo Rella, Stephan F. Tada, Ryuji Nagashima, Kana Ikehara, Minoru Itaki, Takuya Ohkushi, Ken'Ichi Sakamoto, Tatsuhiko Harada, Naomi Uchida, Masao Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period |
topic_facet |
envir geo |
description |
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. Absence of such delta O-18(bf) gradients during periods of high surface productivity in the Bering and Okhotsk Seas, which we correlate to D-O interstadials, suggests a reduction in intermediate water production in the Bering Sea and subsequent introduction of nutrient-rich deep waters from the North Pacific into intermediate depths of the Bering Sea. We argue that a reorganization of atmospheric circulation in the high-latitude North Pacific during severe cold episodes in the last glacial and deglacial period created favorable conditions for brine rejection in the northeastern Bering Sea. The resulting salinity increase in the cold surface waters could have initiated intermediate (and deep) water formation that spread out to the North Pacific. |
format |
Text |
author |
Rella, Stephan F. Tada, Ryuji Nagashima, Kana Ikehara, Minoru Itaki, Takuya Ohkushi, Ken'Ichi Sakamoto, Tatsuhiko Harada, Naomi Uchida, Masao |
author_facet |
Rella, Stephan F. Tada, Ryuji Nagashima, Kana Ikehara, Minoru Itaki, Takuya Ohkushi, Ken'Ichi Sakamoto, Tatsuhiko Harada, Naomi Uchida, Masao |
author_sort |
Rella, Stephan F. |
title |
Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period |
title_short |
Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period |
title_full |
Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period |
title_fullStr |
Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period |
title_full_unstemmed |
Abrupt changes of intermediate water properties on the northeastern slope of the Bering Sea during the last glacial and deglacial period |
title_sort |
abrupt changes of intermediate water properties on the northeastern slope of the bering sea during the last glacial and deglacial period |
publisher |
Amer Geophysical Union |
url |
https://doi.org/10.1029/2011PA002205 https://archimer.ifremer.fr/doc/00265/37642/36754.pdf https://archimer.ifremer.fr/doc/00265/37642/ |
geographic |
Bering Sea Okhotsk Pacific |
geographic_facet |
Bering Sea Okhotsk Pacific |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Archimer, archive institutionnelle de l'Ifremer Paleoceanography (0883-8305) (Amer Geophysical Union), 2012-07 , Vol. 27 , N. PA3203 , P. 1-18 |
op_relation |
doi:10.1029/2011PA002205 10670/1.q76cpp https://archimer.ifremer.fr/doc/00265/37642/36754.pdf https://archimer.ifremer.fr/doc/00265/37642/ |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2011PA002205 |
container_title |
Paleoceanography |
container_volume |
27 |
container_issue |
3 |
container_start_page |
n/a |
op_container_end_page |
n/a |
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1766376782530871296 |