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Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride
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| Title: | Age distribution of Antarctic Bottom Water off Cape Darnley, East Antarctica, estimated using chlorofluorocarbon and sulfur hexafluoride |
| Authors: | Ohashi, Yoshihiko Browse this author | | Yamamoto-Kawai, Michiyo Browse this author | | Kusahara, Kazuya Browse this author | | Sasaki, Ken'ichi Browse this author | | Ohshima, Kay I. Browse this author →KAKEN DB |
| Issue Date: | 19-May-2022 |
| Publisher: | Nature Portfolio |
| Journal Title: | Scientific reports |
| Volume: | 12 |
| Start Page: | 8462 |
| Publisher DOI: | 10.1038/s41598-022-12109-4 |
| Abstract: | 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. |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/86247 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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