Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride
Chlorofluorocarbon (CFC) and sulfur hexafluoride (SF6) were used to investigate the timescale of Antarctic Bottom Water (AABW) that spreads off Cape Darnley (CD) in East Antarctica. The age of the AABW was estimated based on the observed SF6/CFC-12 ratio while taking into account tracer dilution by...
Published in: | Scientific Reports |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Nature Portfolio
|
Subjects: | |
Online Access: | http://hdl.handle.net/2115/86247 https://doi.org/10.1038/s41598-022-12109-4 |
id |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/86247 |
---|---|
record_format |
openpolar |
spelling |
fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/86247 2023-05-15T13:51:33+02:00 Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride Ohashi, Yoshihiko Yamamoto-Kawai, Michiyo Kusahara, Kazuya Sasaki, Ken'ichi Ohshima, Kay I. http://hdl.handle.net/2115/86247 https://doi.org/10.1038/s41598-022-12109-4 eng eng Nature Portfolio http://hdl.handle.net/2115/86247 Scientific reports, 12: 8462 http://dx.doi.org/10.1038/s41598-022-12109-4 https://creativecommons.org/licenses/by/4.0/ CC-BY 452 article fthokunivhus https://doi.org/10.1038/s41598-022-12109-4 2022-11-18T01:07:01Z Chlorofluorocarbon (CFC) and sulfur hexafluoride (SF6) were used to investigate the timescale of Antarctic Bottom Water (AABW) that spreads off Cape Darnley (CD) in East Antarctica. The age of the AABW was estimated based on the observed SF6/CFC-12 ratio while taking into account tracer dilution by Lower Circumpolar Deep Water. Along the western canyons off CD and the similar to 3000 to 3500 m isobaths, the bottom water age was <5 years, reflecting the spread of newly formed CD Bottom Water. Higher ages of similar to 8 years obtained for areas east of CD and > 20 years in the northwestern offshore region indicate inflows of AABW through the Princess Elizabeth Trough and Weddell Sea Deep Water, respectively. This study determined the age distribution in the region off CD, where three different types of AABW spread. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Weddell Sea Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Antarctic Cape Darnley ENVELOPE(69.567,69.567,-67.738,-67.738) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) East Antarctica Princess Elizabeth Trough ENVELOPE(83.000,83.000,-64.167,-64.167) Weddell Weddell Sea Scientific Reports 12 1 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
452 |
spellingShingle |
452 Ohashi, Yoshihiko Yamamoto-Kawai, Michiyo Kusahara, Kazuya Sasaki, Ken'ichi Ohshima, Kay I. Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
topic_facet |
452 |
description |
Chlorofluorocarbon (CFC) and sulfur hexafluoride (SF6) were used to investigate the timescale of Antarctic Bottom Water (AABW) that spreads off Cape Darnley (CD) in East Antarctica. The age of the AABW was estimated based on the observed SF6/CFC-12 ratio while taking into account tracer dilution by Lower Circumpolar Deep Water. Along the western canyons off CD and the similar to 3000 to 3500 m isobaths, the bottom water age was <5 years, reflecting the spread of newly formed CD Bottom Water. Higher ages of similar to 8 years obtained for areas east of CD and > 20 years in the northwestern offshore region indicate inflows of AABW through the Princess Elizabeth Trough and Weddell Sea Deep Water, respectively. This study determined the age distribution in the region off CD, where three different types of AABW spread. |
format |
Article in Journal/Newspaper |
author |
Ohashi, Yoshihiko Yamamoto-Kawai, Michiyo Kusahara, Kazuya Sasaki, Ken'ichi Ohshima, Kay I. |
author_facet |
Ohashi, Yoshihiko Yamamoto-Kawai, Michiyo Kusahara, Kazuya Sasaki, Ken'ichi Ohshima, Kay I. |
author_sort |
Ohashi, Yoshihiko |
title |
Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
title_short |
Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
title_full |
Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
title_fullStr |
Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
title_full_unstemmed |
Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
title_sort |
age distribution of antarctic bottom water off cape darnley, east antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
publisher |
Nature Portfolio |
url |
http://hdl.handle.net/2115/86247 https://doi.org/10.1038/s41598-022-12109-4 |
long_lat |
ENVELOPE(69.567,69.567,-67.738,-67.738) ENVELOPE(69.717,69.717,-67.717,-67.717) ENVELOPE(83.000,83.000,-64.167,-64.167) |
geographic |
Antarctic Cape Darnley Darnley East Antarctica Princess Elizabeth Trough Weddell Weddell Sea |
geographic_facet |
Antarctic Cape Darnley Darnley East Antarctica Princess Elizabeth Trough Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica East Antarctica Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Weddell Sea |
op_relation |
http://hdl.handle.net/2115/86247 Scientific reports, 12: 8462 http://dx.doi.org/10.1038/s41598-022-12109-4 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-022-12109-4 |
container_title |
Scientific Reports |
container_volume |
12 |
container_issue |
1 |
_version_ |
1766255461722488832 |