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Antarctic Bottom Water production from the Vincennes Bay Polynya, East Antarctica

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Title: Antarctic Bottom Water production from the Vincennes Bay Polynya, East Antarctica
Authors: Kitade, Yujiro Browse this author →KAKEN DB
Shimada, Keishi Browse this author →KAKEN DB
Tamura, Takeshi Browse this author →KAKEN DB
Williams, Guy D. Browse this author
Aoki, Shigeru Browse this author →KAKEN DB
Fukamachi, Yasushi Browse this author →KAKEN DB
Roquet, Fabien Browse this author
Hindell, Mark Browse this author
Ushio, Shuki Browse this author →KAKEN DB
Ohshima, Kay I. Browse this author →KAKEN DB
Keywords: Antarctic Bottom Water
dense shelf water
sea-ice production
Australian-Antarctic Basin
Issue Date: 28-May-2014
Publisher: American Geophysical Union
Journal Title: Geophysical Research Letters
Volume: 41
Issue: 10
Start Page: 3528
End Page: 3534
Publisher DOI: 10.1002/2014GL059971
Abstract: One year moorings at depths greater than 3000m on the continental slope off Vincennes Bay, East Antarctica, reveal the cold (<-0.5 degrees 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 (x 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.
Rights: Copyright 2014 American Geophysical Union.
Type: article
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)

Submitter: 大島 慶一郎

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