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Modal Composition of the Central Water in the North Atlantic Subtropical Gyre : Volume 6, Issue 3 (29/10/2009)

By Cianca, A.

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Book Id: WPLBN0004021086
Format Type: PDF Article :
File Size: Pages 20
Reproduction Date: 2015

Title: Modal Composition of the Central Water in the North Atlantic Subtropical Gyre : Volume 6, Issue 3 (29/10/2009)  
Author: Cianca, A.
Volume: Vol. 6, Issue 3
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Marrero, J. P., Rueda, M. J., Santana, R., Cianca, A., & Llinás, O. (2009). Modal Composition of the Central Water in the North Atlantic Subtropical Gyre : Volume 6, Issue 3 (29/10/2009). Retrieved from http://www.worldebookfair.org/


Description
Description: Instituto Canario de Ciencias Marinas (ICCM), Gobierno de Canarias, Apartado 56, Telde, 35200, Spain. The modal composition of the Central Water in the North Atlantic subtropical gyre is not clearly defined, as there are some uncertainties related to mode identification, as well as modes which are not well documented. This study shows that eastern North Atlantic Central Water (eastern NACW) in the subtropical gyre is composed of three modes: The North Atlantic Subpolar Mode Water (NASPMW Σt=27.1 to 27.3), the Madeira Mode Water (MMW Σt=26.4 to 26.6), and the mode water with a Σt near 27.0, which is currently not well documented. We confirmed this mode based on the similarities found between it and the mode waters already reported. The similarities were determined from comparative analyses of the temperature/salinity standard curves and the gradients of the potential density anomalies of two concurrent data sets from two subtropical time-series stations (Bermuda Atlantic Time-series Study, BATS, in the west, and European Station for Time-series in the Ocean Canary Islands, ESTOC, in the east). In order to establish the outcropping regions, the corresponding pycnostads were determined using another climatologic data set (World Ocean Database, WOD2005). In this case, the pycnostads were located based on the presence of standard deviation minima from the average density anomalies. Finally, we confirmed that the pycnostads corresponded to the temperature values related to the modes by overlaying the characteristic modal isotherm of each of the modes in the geographic distribution of the pycnostads. Sea surface temperature data (SST) from the Ocean Pathfinder Program (OPP) were used to estimate the isotherms. The results showed a clear correspondence between the modal isotherms and the pycnostads, for both the modes that have already been documented and the mode confirmed in this study.

Summary
Modal composition of the central water in the North Atlantic subtropical gyre

Excerpt
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