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Temperature–salinity Distribution in the Northeastern Atlantic from Ship and Argo Vertical Casts : Volume 11, Issue 2 (05/03/2015)

By Bashmachnikov, I.

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Book Id: WPLBN0004020249
Format Type: PDF Article :
File Size: Pages 22
Reproduction Date: 2015

Title: Temperature–salinity Distribution in the Northeastern Atlantic from Ship and Argo Vertical Casts : Volume 11, Issue 2 (05/03/2015)  
Author: Bashmachnikov, I.
Volume: Vol. 11, Issue 2
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Nascimento, Â., Neves, F., Medeiros, J., Dias, J., Ambar, I., Carton, X., & Bashmachnikov, I. (2015). Temperature–salinity Distribution in the Northeastern Atlantic from Ship and Argo Vertical Casts : Volume 11, Issue 2 (05/03/2015). Retrieved from

Description: MARE – Marine and Environmental Sciences Centre/Centro de Oceanografia, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016, Lisbon, Portugal. The present study defines new interpolation functions for hydrological data. These functions are applied to generate climatological maps of temperature–salinity distribution with a 25 m depth interval and a 30 km space interval (MEDTRANS data set). The data undergo rigorous initial data quality control, having passed several filtering procedures. The gridding is done on neutral density surfaces, which allows better representation of thermohaline fronts for the same gridding radius. The multi-pass Barnes optimum interpolation procedure with spatially variable size of the gridding window is used. The shape of the window accounts for the dominant along-isobath direction of water mass transport over steeply sloping topography. A local ratio of topographic to planetary β-effects is used to define the shape of the window as a function of the relative importance of the topographic influence. The N/f ratio is applied to account for the baroclinic compensation decay of the topographic influence on water mass transport with the distance from the bottom. The gridded fields are available at the website of the Centre of Oceanography of the University of Lisbon (

The MEDTRANS climatology gives more details of the distribution of water characteristics in the subtropical northeastern Atlantic than other alternative climatologies and is able to reproduce a number of dynamic features described in the literature: the acceleration in the meanders of the Azores current; the cyclonic gyre in the Gulf of Cadiz; and the splitting and separation of the Mediterranean Water (MW) outflow in two veins near the Gorringe and Galicia banks. Seasonal climatologies, computed for the warm (May–October) and cold (November–April) seasons, reveal stronger zonal extension of the upper ocean patterns during the warm season, as compared to the cold one.

Temperature–salinity distribution in the northeastern Atlantic from ship and Argo vertical casts

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