Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement
The radiolarian Amphimelissa setosa is one of the prominent species of the Pleistocene radiolarian assemblages in the Seaof Okhotsk below the marine isotope stage (MIS) boundary 5/4, and it represents one of the most abundant radiolarianspecies in Holocene and modern environments of the Nordic Seas....
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | https://epic.awi.de/id/eprint/14415/ https://doi.org/10.1016/j.dsr2.2005.07.008 https://hdl.handle.net/10013/epic.24720 |
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ftawi:oai:epic.awi.de:14415 2023-05-15T14:29:02+02:00 Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement Matul, Alexander Abelmann, Andrea 2005 https://epic.awi.de/id/eprint/14415/ https://doi.org/10.1016/j.dsr2.2005.07.008 https://hdl.handle.net/10013/epic.24720 unknown Matul, A. and Abelmann, A. (2005) Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement , Deep-sea research ii, 52 , pp. 2351-2364 . doi:10.1016/j.dsr2.2005.07.008 <https://doi.org/10.1016/j.dsr2.2005.07.008> , hdl:10013/epic.24720 EPIC3Deep-sea research ii, 52, pp. 2351-2364 Article isiRev 2005 ftawi https://doi.org/10.1016/j.dsr2.2005.07.008 2021-12-24T15:30:52Z The radiolarian Amphimelissa setosa is one of the prominent species of the Pleistocene radiolarian assemblages in the Seaof Okhotsk below the marine isotope stage (MIS) boundary 5/4, and it represents one of the most abundant radiolarianspecies in Holocene and modern environments of the Nordic Seas. We studied the A. setosa distribution in six cores fromthe Sea of Okhotsk and established morphometric measurements on A. setosa specimens from two cores of the Sea ofOkhotsk and one core from the Labrador Sea. We further compared our data with other available studies from theSubarctic Pacific, the Labrador Sea, the North Atlantic, the Norwegian Sea, and the Iceland/Greenland Seas in order todiscuss the possible settling of the species from the North Pacific via the Arctic Ocean into the Iceland/Greenland Seas. A.setosa exhibits a stable abundant population in the Sea of Okhotsk during most of the last ca. 0.7 m.y. and mightrepeatedly extend its population into the North Atlantic through the Arctic Ocean during the Pleistocene interglacialoptima. The species declines from the Sea of Okhotsk and from the Subarctic Pacific at the end of MIS 5. Its finaldocumented settling into the North Atlantic is during MIS 5, when A. setosa appears in low numbers in sediments of theLabrador Sea, however reaching significant percentages at the boundary of MIS 5/4. Based on the available information,we propose that A. setosa could migrate from the North Pacific into the Arctic Ocean during the interglacial optimum MIS5e and then through the channels of the Canadian Arctic Archipelago into the Baffin Bay and Labrador Sea. A furthermigration step of A. setosa occurs at the boundary of MIS 5/4, when A. setosa migrated from the Labrador Sea into theNorth Atlantic, probably related to a southward expansion of cold waters at the end of the MIS 5. During the warming atTermination I, A. setosa moved from the North Atlantic into the Nordic Seas. The abundant occurrence of A. setosa insediments south of Iceland, the Norwegian and North Seas within the Younger Dryas period points to a marked coolingand a southward movement of polar water masses restricted to this time interval. Article in Journal/Newspaper Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Greenland Iceland Labrador Sea Nordic Seas North Atlantic Norwegian Sea Subarctic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Arctic Ocean Norwegian Sea Okhotsk Baffin Bay Canadian Arctic Archipelago Greenland Pacific Deep Sea Research Part II: Topical Studies in Oceanography 52 16-18 2351 2364 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The radiolarian Amphimelissa setosa is one of the prominent species of the Pleistocene radiolarian assemblages in the Seaof Okhotsk below the marine isotope stage (MIS) boundary 5/4, and it represents one of the most abundant radiolarianspecies in Holocene and modern environments of the Nordic Seas. We studied the A. setosa distribution in six cores fromthe Sea of Okhotsk and established morphometric measurements on A. setosa specimens from two cores of the Sea ofOkhotsk and one core from the Labrador Sea. We further compared our data with other available studies from theSubarctic Pacific, the Labrador Sea, the North Atlantic, the Norwegian Sea, and the Iceland/Greenland Seas in order todiscuss the possible settling of the species from the North Pacific via the Arctic Ocean into the Iceland/Greenland Seas. A.setosa exhibits a stable abundant population in the Sea of Okhotsk during most of the last ca. 0.7 m.y. and mightrepeatedly extend its population into the North Atlantic through the Arctic Ocean during the Pleistocene interglacialoptima. The species declines from the Sea of Okhotsk and from the Subarctic Pacific at the end of MIS 5. Its finaldocumented settling into the North Atlantic is during MIS 5, when A. setosa appears in low numbers in sediments of theLabrador Sea, however reaching significant percentages at the boundary of MIS 5/4. Based on the available information,we propose that A. setosa could migrate from the North Pacific into the Arctic Ocean during the interglacial optimum MIS5e and then through the channels of the Canadian Arctic Archipelago into the Baffin Bay and Labrador Sea. A furthermigration step of A. setosa occurs at the boundary of MIS 5/4, when A. setosa migrated from the Labrador Sea into theNorth Atlantic, probably related to a southward expansion of cold waters at the end of the MIS 5. During the warming atTermination I, A. setosa moved from the North Atlantic into the Nordic Seas. The abundant occurrence of A. setosa insediments south of Iceland, the Norwegian and North Seas within the Younger Dryas period points to a marked coolingand a southward movement of polar water masses restricted to this time interval. |
format |
Article in Journal/Newspaper |
author |
Matul, Alexander Abelmann, Andrea |
spellingShingle |
Matul, Alexander Abelmann, Andrea Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement |
author_facet |
Matul, Alexander Abelmann, Andrea |
author_sort |
Matul, Alexander |
title |
Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement |
title_short |
Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement |
title_full |
Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement |
title_fullStr |
Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement |
title_full_unstemmed |
Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement |
title_sort |
pleistocene and holocene distribution of the radiolarian amphimelissa setosa cleve in the north pacific and north atlantic: evidence for water mass movement |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/14415/ https://doi.org/10.1016/j.dsr2.2005.07.008 https://hdl.handle.net/10013/epic.24720 |
geographic |
Arctic Arctic Ocean Norwegian Sea Okhotsk Baffin Bay Canadian Arctic Archipelago Greenland Pacific |
geographic_facet |
Arctic Arctic Ocean Norwegian Sea Okhotsk Baffin Bay Canadian Arctic Archipelago Greenland Pacific |
genre |
Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Greenland Iceland Labrador Sea Nordic Seas North Atlantic Norwegian Sea Subarctic |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Greenland Iceland Labrador Sea Nordic Seas North Atlantic Norwegian Sea Subarctic |
op_source |
EPIC3Deep-sea research ii, 52, pp. 2351-2364 |
op_relation |
Matul, A. and Abelmann, A. (2005) Pleistocene and Holocene distribution of the radiolarian Amphimelissa setosa Cleve in the north Pacific and North Atlantic: Evidence for water mass movement , Deep-sea research ii, 52 , pp. 2351-2364 . doi:10.1016/j.dsr2.2005.07.008 <https://doi.org/10.1016/j.dsr2.2005.07.008> , hdl:10013/epic.24720 |
op_doi |
https://doi.org/10.1016/j.dsr2.2005.07.008 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
52 |
container_issue |
16-18 |
container_start_page |
2351 |
op_container_end_page |
2364 |
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1766303138394931200 |