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Intrusion of Coastal Waters Into the Pelagic Eastern Mediterranean: in Situ and Satellite-based Characterization : Volume 9, Issue 12 (13/12/2012)

By Efrati, S.

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Book Id: WPLBN0003980319
Format Type: PDF Article :
File Size: Pages 23
Reproduction Date: 2015

Title: Intrusion of Coastal Waters Into the Pelagic Eastern Mediterranean: in Situ and Satellite-based Characterization : Volume 9, Issue 12 (13/12/2012)  
Author: Efrati, S.
Volume: Vol. 9, Issue 12
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Heifetz, E., Goldman, R., Kress, N., Ozer, T., Lehahn, Y., Herut, B.,...Rahav, E. (2012). Intrusion of Coastal Waters Into the Pelagic Eastern Mediterranean: in Situ and Satellite-based Characterization : Volume 9, Issue 12 (13/12/2012). Retrieved from

Description: The Dr. Moses Strauss Department of Marine Geosciences, University of Haifa, Mt. Carmel, 31905, Israel. A combined dataset of near real time multi-satellite observations and in situ measurements from a high-resolution survey, is used for characterizing physical-biogeochemical properties of a patch stretching from the coast to the open sea in the Levantine basin of the Eastern Mediterranean. Spatial analysis of the combined dataset indicates that the patch is a semi-enclosed system, bounded within the mixed layer and separated from ambient waters by transport barriers induced by horizontal stirring. As such, the patch is characterized by physical-biogeochemical properties that significantly differ from those of the waters surrounding it, with lower salinity, higher temperatures, higher concentrations of silicic acid and chlorophyll a, and higher abundance of Synechococcus and Picoeukaryotes cells. Based on estimates of patch dimensions (~ 40 km width and ~ 25 m depth) and propagation speed (~ 0.09 m s−1), the volume flux associated with the patch is found to be in the order of 0.1 Sv. Our observations suggest that horizontal stirring by surface currents is likely to have an important impact on the ultra-oligotrophic Levantine basin ecosystem, through (1) transport of nutrients and coastal derived material, and (2) formation of local, dynamically isolated, niches. In addition, this work provides a satellite-based framework for planning and executing high resolution sampling strategies in the interface between coast and the open sea.

Intrusion of coastal waters into the pelagic Eastern Mediterranean: in situ and satellite-based characterization

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