Radioisotope constraints of Arctic deep water export to the North Atlantic
The export of deep water from the Arctic to the Atlantic contributes to the formation of North Atlantic Deep Water, a crucial component of global ocean circulation. Records of protactinium-231 (231Pa) and thorium-230 (230Th) in Arctic sediments can provide a measure of this export, but well-constrai...
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2021
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ftrowanuniv:oai:rdw.rowan.edu:see_facpub-1055 2023-05-15T14:32:28+02:00 Radioisotope constraints of Arctic deep water export to the North Atlantic Kipp, Lauren Manus, Jerry F Kienast, Markus 2021-06-16T07:00:00Z application/pdf https://rdw.rowan.edu/see_facpub/60 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1055&context=see_facpub unknown Rowan Digital Works https://rdw.rowan.edu/see_facpub/60 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1055&context=see_facpub http://creativecommons.org/licenses/by/4.0/ CC-BY School of Earth & Environment Faculty Scholarship Earth Sciences Environmental Sciences Oceanography and Atmospheric Sciences and Meteorology article 2021 ftrowanuniv 2021-12-28T15:19:32Z The export of deep water from the Arctic to the Atlantic contributes to the formation of North Atlantic Deep Water, a crucial component of global ocean circulation. Records of protactinium-231 (231Pa) and thorium-230 (230Th) in Arctic sediments can provide a measure of this export, but well-constrained sedimentary budgets of these isotopes have been difficult to achieve in the Arctic Ocean. Previous studies revealed a deficit of 231Pa in central Arctic sediments, implying that some 231Pa is either transported to the margins, where it may be removed in areas of higher particle flux, or exported from the Arctic via deep water advection. Here we investigate this “missing sink” of Arctic 231Pa and find moderately increased 231Pa deposition along Arctic margins. Nonetheless, we determine that most 231Pa missing from the central basin must be lost via advection into the Nordic Seas, requiring deep water advection of 1.1 – 6.4 Sv through Fram Strait. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Nordic Seas North Atlantic Deep Water North Atlantic Rowan University: Rowan Digital Works Arctic Arctic Ocean Central Basin ENVELOPE(43.000,43.000,73.500,73.500) |
institution |
Open Polar |
collection |
Rowan University: Rowan Digital Works |
op_collection_id |
ftrowanuniv |
language |
unknown |
topic |
Earth Sciences Environmental Sciences Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Earth Sciences Environmental Sciences Oceanography and Atmospheric Sciences and Meteorology Kipp, Lauren Manus, Jerry F Kienast, Markus Radioisotope constraints of Arctic deep water export to the North Atlantic |
topic_facet |
Earth Sciences Environmental Sciences Oceanography and Atmospheric Sciences and Meteorology |
description |
The export of deep water from the Arctic to the Atlantic contributes to the formation of North Atlantic Deep Water, a crucial component of global ocean circulation. Records of protactinium-231 (231Pa) and thorium-230 (230Th) in Arctic sediments can provide a measure of this export, but well-constrained sedimentary budgets of these isotopes have been difficult to achieve in the Arctic Ocean. Previous studies revealed a deficit of 231Pa in central Arctic sediments, implying that some 231Pa is either transported to the margins, where it may be removed in areas of higher particle flux, or exported from the Arctic via deep water advection. Here we investigate this “missing sink” of Arctic 231Pa and find moderately increased 231Pa deposition along Arctic margins. Nonetheless, we determine that most 231Pa missing from the central basin must be lost via advection into the Nordic Seas, requiring deep water advection of 1.1 – 6.4 Sv through Fram Strait. |
format |
Article in Journal/Newspaper |
author |
Kipp, Lauren Manus, Jerry F Kienast, Markus |
author_facet |
Kipp, Lauren Manus, Jerry F Kienast, Markus |
author_sort |
Kipp, Lauren |
title |
Radioisotope constraints of Arctic deep water export to the North Atlantic |
title_short |
Radioisotope constraints of Arctic deep water export to the North Atlantic |
title_full |
Radioisotope constraints of Arctic deep water export to the North Atlantic |
title_fullStr |
Radioisotope constraints of Arctic deep water export to the North Atlantic |
title_full_unstemmed |
Radioisotope constraints of Arctic deep water export to the North Atlantic |
title_sort |
radioisotope constraints of arctic deep water export to the north atlantic |
publisher |
Rowan Digital Works |
publishDate |
2021 |
url |
https://rdw.rowan.edu/see_facpub/60 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1055&context=see_facpub |
long_lat |
ENVELOPE(43.000,43.000,73.500,73.500) |
geographic |
Arctic Arctic Ocean Central Basin |
geographic_facet |
Arctic Arctic Ocean Central Basin |
genre |
Arctic Arctic Ocean Fram Strait Nordic Seas North Atlantic Deep Water North Atlantic |
genre_facet |
Arctic Arctic Ocean Fram Strait Nordic Seas North Atlantic Deep Water North Atlantic |
op_source |
School of Earth & Environment Faculty Scholarship |
op_relation |
https://rdw.rowan.edu/see_facpub/60 https://rdw.rowan.edu/cgi/viewcontent.cgi?article=1055&context=see_facpub |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766305873952505856 |