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The Cyclonic Eddy Train in the Indian Ocean Sector of the Southern Ocean as Revealed by Satellite Radar Altimeters and In Situ Measurements
https://oacis.repo.nii.ac.jp/records/2092
https://oacis.repo.nii.ac.jp/records/20928a10d82e-aed8-4e2d-a398-026d972e3653
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2021-05-10 | |||||
タイトル | ||||||
タイトル | The Cyclonic Eddy Train in the Indian Ocean Sector of the Southern Ocean as Revealed by Satellite Radar Altimeters and In Situ Measurements | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
著者 |
Mizobata, Kohei
× Mizobata, Kohei× Shimada, Keishi× Aoki, Shigeru× Kitade, Yujiro |
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書誌情報 |
Journal of Geophysical Research: Oceans 巻 152, 号 6, 発行日 2020-03-27 |
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抄録 | ||||||
内容記述 | We investigated dynamic ocean topography (DOT) to reveal the oceanic subpolar circulation and possible pathway of modified Circumpolar Deep Water (CDW) in the Indian Ocean sector of the Southern Ocean. Satellite radar altimeter data sets were employed to develop monthly DOT in both open water and ice‐covered areas throughout the course of a year. A 0.2° × 0.2° gridded DOT was reconstructed for investigation of the oceanic structure at fine scale. The reconstructed DOT exhibited a “cyclonic eddy train” consisting of the Vincennes eddy, Poinsett eddy, and Sabrina eddies. The relationship between the depth of each eddy and the wind curl showed negative correlations for the Vincennes eddy and Sabrina eddies during wintertime only. Therefore, winds are not the main drivers of the eddies. A hydrographic section in 2017 clearly revealed the vertical structure of the Vincennes eddy. The absolute velocity estimated by the DOT and in situ geostrophic velocity showed equatorward Antarctic Bottom Water (AABW) transport at 6–8 cm s−1 on the western side and poleward transport of CDW at 3–4 cm s−1 on the eastern side of the Vincennes eddy. The net transports of the AABW and CDW layers in the Vincennes eddy were 0.6 ± 0.4 Sv (equatorward) and 0.5 ± 0.36 Sv (poleward), respectively. The order of magnitude of the AABW current speed was confirmed by in situ mooring data. The vertical profiles of absolute velocity suggest the possibility of estimating CDW transport using a satellite altimeter. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2169-9291 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12875563 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1029/2019JC015994 | |||||
情報源 | ||||||
関連識別子 | https://doi.org/10.1029/2019JC015994 | |||||
関連名称 | Publisher's Version/PDF | |||||
情報源 | ||||||
関連識別子 | https://nrid.nii.ac.jp/ja/nrid/1000080586058/ | |||||
関連名称 | 研究代表者: 溝端浩平 (東京海洋大学) | |||||
情報源 | ||||||
関連識別子 | https://kaken.nii.ac.jp/grant/KAKENHI-PUBLICLY-18H05051/ | |||||
関連名称 | KAKEN研究課題: 衛星高度計による南極海海氷域の海洋循環の解明と周極深層水の輸送経路の推定 | |||||
情報源 | ||||||
関連識別子 | https://www.agu.org/ | |||||
関連名称 | American Geophysical Union | |||||
出版者 | ||||||
出版者 | John Wiley & Sons | |||||
科学研究費研究課題 | ||||||
主題 | 衛星高度計による南極海海氷域の海洋循環の解明と周極深層水の輸送経路の推定 | |||||
科学研究費研究課題 | ||||||
主題 | Elucidation of ocean circulation and estimation of the pathway of the Circumpolar Deep Water in the Southern Ocean seasonal sea ice zone by using satellite radar altimeter | |||||
研究課題番号 | ||||||
内容記述 | 18H05051 |