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Antarctic bottom water production from the Vincennes Bay Polynya, East Antarctica
journal contribution
posted on 2023-05-18, 03:11 authored by Kitade, Y, Shimada, K, Tamura, T, Guy Williams, Aoki, S, Fukamachi, Y, Roquet, F, Mark HindellMark Hindell, Ushio, S, Ohshima, Kay KOne year moorings at depths greater than 3000m on the continental slope off Vincennes Bay, East Antarctica, reveal the cold (<-0.5°C) and fresh (<34.64) signals of newly formed Antarctic Bottom Water (AABW). The signal appeared in June, 3 months after the onset of active sea-ice production in the nearby Vincennes Bay Polynya (VBP). The AABW signal continued for about 5 months at two moorings, with 1 month delay at the western site further downstream. Ship-based hydrographic data are in agreement, detecting the westward spread of new AABW over the continental slope from VBP. On the continental shelf, Dense Shelf Water (DSW) formation is observed by instrumented seals, in and around the VBP during autumn, and we estimate its transport to be 0.16±0.07 (× 106m3s-1). We conclude that the DSW formed in this region, albeit from a modest amount of sea-ice production, nonetheless contributes to the upper layer of AABW in Australian-Antarctic Basin. © 2014. American Geophysical Union. All Rights Reserved.
History
Publication title
Geophysical Research LettersVolume
41Issue
10Pagination
3528-3534ISSN
0094-8276Department/School
Institute for Marine and Antarctic StudiesPublisher
Amer Geophysical UnionPlace of publication
2000 Florida Ave Nw, Washington, USA, Dc, 20009Rights statement
Copyright 2014 American Geophysical UnionRepository Status
- Restricted