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A Global Algorithm for Estimating Absolute Salinity : Volume 8, Issue 6 (21/12/2012)

By McDougall, T. J.

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Book Id: WPLBN0004020564
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: A Global Algorithm for Estimating Absolute Salinity : Volume 8, Issue 6 (21/12/2012)  
Author: McDougall, T. J.
Volume: Vol. 8, Issue 6
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Millero, F. J., Jackett, D. R., Pawlowicz, R., Mcdougall, T. J., & Barker, P. M. (2012). A Global Algorithm for Estimating Absolute Salinity : Volume 8, Issue 6 (21/12/2012). Retrieved from http://worldlibrary.net/


Description
Description: School of Mathematics and Statistics, University of New South Wales, Sydney, Australia. The International Thermodynamic Equation of Seawater – 2010 has defined the thermodynamic properties of seawater in terms of a new salinity variable, Absolute Salinity, which takes into account the spatial variation of the composition of seawater. Absolute Salinity more accurately reflects the effects of the dissolved material in seawater on the thermodynamic properties (particularly density) than does Practical Salinity.

When a seawater sample has standard composition (i.e. the ratios of the constituents of sea salt are the same as those of surface water of the North Atlantic), Practical Salinity can be used to accurately evaluate the thermodynamic properties of seawater. When seawater is not of standard composition, Practical Salinity alone is not sufficient and the Absolute Salinity Anomaly needs to be estimated; this anomaly is as large as 0.025 g kg−1 in the northernmost North Pacific. Here we provide an algorithm for estimating Absolute Salinity Anomaly for any location (x, y, p) in the world ocean.

To develop this algorithm, we used the Absolute Salinity Anomaly that is found by comparing the density calculated from Practical Salinity to the density measured in the laboratory. These estimates of Absolute Salinity Anomaly however are limited to the number of available observations (namely 811). In order to provide a practical method that can be used at any location in the world ocean, we take advantage of approximate relationships between Absolute Salinity Anomaly and silicate concentrations (which are available globally).


Summary
A global algorithm for estimating Absolute Salinity

Excerpt
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