气候变化领域集成服务门户(CCPortal): The Cyclonic Eddy Train in the Indian Ocean Sector of the Southern Ocean as Revealed by Satellite Radar Altimeters and In Situ Measurements

CCPortal

DOI	10.1029/2019JC015994
	The Cyclonic Eddy Train in the Indian Ocean Sector of the Southern Ocean as Revealed by Satellite Radar Altimeters and In Situ Measurements
	Mizobata K.; Shimada K.; Aoki S.; Kitade Y.
发表日期	2020
ISSN	21699275
卷号	125 期号:6
英文摘要	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. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	CDW; cyclonic eddy; dynamic ocean topography; satellite radar altimeter; Southern Ocean
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186837
作者单位	Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan; Center for Marine Research and Operations, Tokyo University of Marine Science and Technology, Tokyo, Japan; Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan
推荐引用方式 GB/T 7714	Mizobata K.,Shimada K.,Aoki S.,et al. The Cyclonic Eddy Train in the Indian Ocean Sector of the Southern Ocean as Revealed by Satellite Radar Altimeters and In Situ Measurements[J],2020,125(6).
APA	Mizobata K.,Shimada K.,Aoki S.,&Kitade Y..(2020).The Cyclonic Eddy Train in the Indian Ocean Sector of the Southern Ocean as Revealed by Satellite Radar Altimeters and In Situ Measurements.Journal of Geophysical Research: Oceans,125(6).
MLA	Mizobata K.,et al."The Cyclonic Eddy Train in the Indian Ocean Sector of the Southern Ocean as Revealed by Satellite Radar Altimeters and In Situ Measurements".Journal of Geophysical Research: Oceans 125.6(2020).