DOI: 10.1002/2017JC013712
Scopus记录号: 2-s2.0-85048044665
论文题名: Observed Characteristics and Vertical Structure of Mesoscale Eddies in the Southwest Tropical Pacific
作者: Keppler L. ; Cravatte S. ; Chaigneau A. ; Pegliasco C. ; Gourdeau L. ; Singh A.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2731
结束页码: 2756
语种: 英语
英文关键词: argo floats
; mesoscale eddies
; satellite altimetry
; southwest Pacific
Scopus关键词: algorithm
; Argo
; bathymetry
; gyre
; mesoscale eddy
; mixing
; satellite altimetry
; vertical profile
; water exchange
; water mass
; Coral Sea
; Fiji
; New Caledonia [Melanesia]
; Pacific Ocean
; Pacific Ocean (Southwest)
; Pacific Ocean (Tropical)
; Anthozoa
英文摘要: In the Southwest Pacific Ocean, waters transit from the subtropical gyre before being redistributed equatorward and poleward. While the mean pathways are known, the contribution to the mixing and transport of the water from mesoscale eddies has not been comprehensively investigated. In this research, satellite altimetry data, combined with an eddy detection and tracking algorithm is used to investigate the distribution and surface characteristics of mesoscale eddies in this region of complex bathymetry (10°S–30°S, 140°E–190°E). Detected eddies are then colocalized with in situ data from Argo floats to determine their vertical structure and the effect of eddies on the water masses. The numerous islands affect the eddy behavior as most eddies are formed in the lee of islands, propagate westward and decay when encountering shallow bathymetry. Eddies are sparse and short-lived in the tropical area north of Fiji, impacting only the top 200 meters of water. They do not appear to be able to trap and transport waters in this region. In the Coral Sea, a region of lateral shear between currents transporting waters of different origins, eddies are more numerous and energetic. They affect the water properties down to at least 500 m depth, and anticyclonic eddies trap water to ∼200 m, contributing to the upper thermocline waters mixing and transport. South of New Caledonia, mesoscale eddies are ubiquitous, with typical lifetimes longer than 5 months. They affect the temperature, salinity, and velocities down to ∼1,000 m depth, and weakly contribute to the mixing of lower thermocline waters. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114193
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: The University of the South Pacific (USP), PaCE-SD, Suva, Fiji; The Max-Planck-Institute for Meteorology, The Ocean in the Earth System, Hamburg, Germany; International Max Planck Research School on Earth System Modelling (IMPRS-ESM), Hamburg, Germany; LEGOS, Université de Toulouse, IRD, CNES, CNRS, UPS, Toulouse, France
Recommended Citation:
Keppler L.,Cravatte S.,Chaigneau A.,et al. Observed Characteristics and Vertical Structure of Mesoscale Eddies in the Southwest Tropical Pacific[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)