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Internal waves revealed by Synthetic Aperture Radar (SAR) imagery in the vicinity of the eastern Cretan Arc Straits (Eastern Mediterranean)

Internal waves revealed by Synthetic Aperture Radar (SAR) imagery in the vicinity of the eastern Cretan Arc Straits (Eastern Mediterranean)
Internal waves revealed by Synthetic Aperture Radar (SAR) imagery in the vicinity of the eastern Cretan Arc Straits (Eastern Mediterranean)
Internal waves have been detected on ERS-1 SAR images obtained during late summer over the eastern Cretan Straits, an area characterised by complex regional physiography, bottom topography, flow regime and stratification patterns of the upper part of the water column. Analysis of the imaged characteristics of the internal waves has revealed a strong diversity in form, propagation direction and type of sea surface modulation, which indicates various mechanisms of generation. Analysis of the currents recorded over the area shows that, although semi-diurnal tidal currents are present, these are of low magnitude in comparison with the overall flow and, therefore, tidal forcing is unlikely to be a major process in the generation of the imaged internal waves. In addition, a well-defined front has been identified within the Rhodes Strait. This front is considered to be the surficial manifestation of the Asia Minor Current, which is a strong and persistent large-scale circulation feature of the Eastern Mediterranean.
0079-6611
553-572
Velegrakis, A.F.
362f903e-7e0a-4a47-a98d-076586d6ad42
Oikonomou, E.
2cc51ab2-d9f0-4b9d-86e2-f4e95ad92b5c
Theocharis, A.
761ff2fc-d4c6-40c9-ae1d-51c3b62095e4
Collins, M.B.
3b70278b-0004-45e0-b3c9-0debdf0a9351
Kontoyiannis, H.
2b16d0df-fc20-4306-976c-81a3e3b5ae6a
Papadopoulos, V.
14616229-b2a5-4674-82c7-1a650649026d
Voulgaris, G.
c695d93c-1092-4223-b02a-6c1fc5fcb45c
Wells, T.
011e2299-dad8-4563-8a93-b0100fda105a
Balopoulos, E.
d92e2843-4166-4a2e-950e-ae746e30fc5e
Velegrakis, A.F.
362f903e-7e0a-4a47-a98d-076586d6ad42
Oikonomou, E.
2cc51ab2-d9f0-4b9d-86e2-f4e95ad92b5c
Theocharis, A.
761ff2fc-d4c6-40c9-ae1d-51c3b62095e4
Collins, M.B.
3b70278b-0004-45e0-b3c9-0debdf0a9351
Kontoyiannis, H.
2b16d0df-fc20-4306-976c-81a3e3b5ae6a
Papadopoulos, V.
14616229-b2a5-4674-82c7-1a650649026d
Voulgaris, G.
c695d93c-1092-4223-b02a-6c1fc5fcb45c
Wells, T.
011e2299-dad8-4563-8a93-b0100fda105a
Balopoulos, E.
d92e2843-4166-4a2e-950e-ae746e30fc5e

Velegrakis, A.F., Oikonomou, E., Theocharis, A., Collins, M.B., Kontoyiannis, H., Papadopoulos, V., Voulgaris, G., Wells, T. and Balopoulos, E. (1999) Internal waves revealed by Synthetic Aperture Radar (SAR) imagery in the vicinity of the eastern Cretan Arc Straits (Eastern Mediterranean). Progress in Oceanography, 44 (4), 553-572. (doi:10.1016/S0079-6611(99)00046-4).

Record type: Article

Abstract

Internal waves have been detected on ERS-1 SAR images obtained during late summer over the eastern Cretan Straits, an area characterised by complex regional physiography, bottom topography, flow regime and stratification patterns of the upper part of the water column. Analysis of the imaged characteristics of the internal waves has revealed a strong diversity in form, propagation direction and type of sea surface modulation, which indicates various mechanisms of generation. Analysis of the currents recorded over the area shows that, although semi-diurnal tidal currents are present, these are of low magnitude in comparison with the overall flow and, therefore, tidal forcing is unlikely to be a major process in the generation of the imaged internal waves. In addition, a well-defined front has been identified within the Rhodes Strait. This front is considered to be the surficial manifestation of the Asia Minor Current, which is a strong and persistent large-scale circulation feature of the Eastern Mediterranean.

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Published date: December 1999

Identifiers

Local EPrints ID: 180299
URI: http://eprints.soton.ac.uk/id/eprint/180299
ISSN: 0079-6611
PURE UUID: 4e1f0e62-4f98-4838-b704-146fa8a37307

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Date deposited: 06 Apr 2011 14:03
Last modified: 08 Jan 2022 05:34

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Contributors

Author: A.F. Velegrakis
Author: E. Oikonomou
Author: A. Theocharis
Author: M.B. Collins
Author: H. Kontoyiannis
Author: V. Papadopoulos
Author: G. Voulgaris
Author: T. Wells
Author: E. Balopoulos

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