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Inter-annual/decadal variability of north Aegean Sea hydrodynamics over 1960-2000

Inter-annual/decadal variability of north Aegean Sea hydrodynamics over 1960-2000
Inter-annual/decadal variability of north Aegean Sea hydrodynamics over 1960-2000
Results from a high-resolution hindcast model experiment, supported by available observations, reveal an increasing salinity trend in the north Aegean during the Eastern Mediterranean Transient (EMT) period, largely controlled by increases in the flow rate and salinity of water masses of Levantine origin entering the domain through the Myconos-Ikaria strait as a response to an acceleration of the Aegean thermohaline cell. Changes in the Dardanelles inflow (increasing salinity) and in the surface freshwater flux (increasing Evaporation-Precipitation), although both contributing to a higher salt content of the basin during the EMT, play a minor role in the inter-annual/decadal variability of the freshwater budget. A long-term decreasing temperature trend is observed from the 1960s to the early 1990s. It is superimposed on the salinity-preconditioning phase over the 1980s and early 1990s. Both signals are, concomitantly, favouring conditions for intense Dense Water Formation (DWF) in the north Aegean Sea. In addition, the northward displacement of the Black Sea Water front over the EMT, leads to the expansion of convective cells towards the north and to higher formation rates associated with both colder and saltier surface waters.
North Aegean Sea, Thermohaline forcing, Dardanelles strait, Dense Water Formation, Eastern Mediterranean Transient
1108-393X
696-705
Vervatis, V.D.
4cc6b2e1-8e11-4153-ba03-5d130a9be6c1
Skliris, N.
b67822f3-b1fc-49a6-8e04-7b917003a21c
Sofianos, S.S.
efbd4dc9-1c4c-49f7-bc83-33930f54cf8f
Vervatis, V.D.
4cc6b2e1-8e11-4153-ba03-5d130a9be6c1
Skliris, N.
b67822f3-b1fc-49a6-8e04-7b917003a21c
Sofianos, S.S.
efbd4dc9-1c4c-49f7-bc83-33930f54cf8f

Vervatis, V.D., Skliris, N. and Sofianos, S.S. (2014) Inter-annual/decadal variability of north Aegean Sea hydrodynamics over 1960-2000. Mediterranean Marine Science, 15 (4), 696-705. (doi:10.12681/852).

Record type: Article

Abstract

Results from a high-resolution hindcast model experiment, supported by available observations, reveal an increasing salinity trend in the north Aegean during the Eastern Mediterranean Transient (EMT) period, largely controlled by increases in the flow rate and salinity of water masses of Levantine origin entering the domain through the Myconos-Ikaria strait as a response to an acceleration of the Aegean thermohaline cell. Changes in the Dardanelles inflow (increasing salinity) and in the surface freshwater flux (increasing Evaporation-Precipitation), although both contributing to a higher salt content of the basin during the EMT, play a minor role in the inter-annual/decadal variability of the freshwater budget. A long-term decreasing temperature trend is observed from the 1960s to the early 1990s. It is superimposed on the salinity-preconditioning phase over the 1980s and early 1990s. Both signals are, concomitantly, favouring conditions for intense Dense Water Formation (DWF) in the north Aegean Sea. In addition, the northward displacement of the Black Sea Water front over the EMT, leads to the expansion of convective cells towards the north and to higher formation rates associated with both colder and saltier surface waters.

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More information

Published date: 2014
Keywords: North Aegean Sea, Thermohaline forcing, Dardanelles strait, Dense Water Formation, Eastern Mediterranean Transient
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 374174
URI: http://eprints.soton.ac.uk/id/eprint/374174
ISSN: 1108-393X
PURE UUID: 708d4b8e-6046-4aec-b1e5-c983ec8453f4

Catalogue record

Date deposited: 06 Feb 2015 14:18
Last modified: 15 Jul 2019 21:30

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