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The salinity signature of the equatorial Pacific cold tongue as revealed by the satellite SMOS mission

Citation

Maes, C and Reul, N and Behringer, D and O'Kane, T, The salinity signature of the equatorial Pacific cold tongue as revealed by the satellite SMOS mission, Geoscience Letters, 1, (1) Article 17. ISSN 2196-4092 (2014) [Refereed Article]


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Copyright Statement

Copyright 2014 Maes et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1186/s40562-014-0017-5

Abstract

The space-borne measurements of the SMOS mission reveal for the first time the complete features of the sea surface salinity (SSS) signature at the full scale of the Pacific basin. The SSS field in the equatorial cold tongue is typically found to be larger than 35.1 within a narrow 2░ band of latitude that is positioned slightly south of the equator and that stretches across the eastern Pacific basin up to the Galapagos Islands. On the northern edge of the eastern equatorial Pacific this signature results in a very strong horizontal gradient (larger than 2 units over 100ákm) with the fresh waters of the Panama warm pool. By considering a water density criterion, it can be shown that the cold tongue is characterized by a strong seasonal cycle with a 3░C amplitude in SST where the warm season of February-March contrasts with the cold period extending from September to November. If the present ocean reanalyzes are able to capture these features, then the assimilation of the SMOS data becomes a worthwhile objective in order to depict more accurately the salinity signature of the cold tongue of the tropical Pacific.

Item Details

Item Type:Refereed Article
Keywords:physical oceanography, cold tongue, salinity, remote sensing data, Pacific Ocean
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical Oceanography
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Marine Oceanic Processes (excl. climate related)
Author:O'Kane, T (Dr Terry O'Kane)
ID Code:121412
Year Published:2014
Deposited By:Centre for Oceans and Cryosphere
Deposited On:2017-09-28
Last Modified:2017-10-02
Downloads:11 View Download Statistics

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