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Changes in Atlantic Water characteristics in the south-eastern Mediterranean Sea as a result of natural and anthropogenic activities

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Author(s): Mohamed A. Said | Makram A. Gerges | Ibrahim A. Maiyza | Maged A. Hussein | Ahmed A. Radwan

Journal: Oceanologia
ISSN 0078-3234

Volume: 53;
Issue: 1;
Start page: 81;
Date: 2011;
Original page

Keywords: Atlantic water | temperature and salinity | trend | Mediterranean | Egypt

ABSTRACT
The paper investigates the changes in the characteristics of Atlantic Water (AW) flowing eastwards along the Egyptian coast in the south-easternMediterranean during the period 1959-2008.       Vertically, only one water mass could be observed in winter in the upper 200 m layer, whereas insummer, there were three distinct water masses. The subsurface water mass, of Atlantic origin, occupying the 50-150 m layer andcharacterized by low salinities from < 38.60 to 38.80 PSU, moves throughout the study area from west to east and spreads over a range of density between 27.5 and 28.5 σt.       Temperature and salinity have indicated increasing trends for both temperature and salinity during the last 25 years (1983-2008),reaching 0.85°C decade-1 and 0.073 PSU dec-1, respectively, for the Mediterranean surface waters. For the Atlantic water,the trends were 0.28°C dec-1 for temperature and 0.014 PSU dec-1 for salinity.
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