Abstract
<strong class="journal-contentHeaderColor">Abstract.</strong> A statistical technique for image processing, the maximum cross correlation (MCC) method, was utilized on sequences of NOAA-AVHRR thermal data in order to explore the surface advective current dynamics at the discharge region of the Hellespont in the North Aegean Sea. A 2D numerical flow model was also used in order to simulate the barotropic flow pattern of the surface water layer. The model was forced with diurnal wind fields obtained for the same period as the satellite infrared images. The currents (magnitude and direction) derived from the two methods compare satisfactorily despite the fact that some model simplifications were made.
Highlights
A considerable amount of in situ data is needed in order to study mesoscale sea surface phenomena linked to flows through straits, eddies, jet currents, upwelling etc
The use of satellite infrared data in oceanographic studies has a unique potential in providing mesoscale and synoptic sea surface temperature information concerning flow patterns
Satellite SST images (NOAA-AVHRR CH4 10-bit data) in the North Aegean Sea obtained by the end of June 1995 reveal: a the cool patch of the modified BSW at the discharge region of the Hellespont and b the co-existence of the cool BSW with the upwelled waters resulting from the northerly etesian winds resolution about 0.5 °C, were used in order to obtain the necessary information on the sea surface water movements (Fig. 5): a
Summary
A considerable amount of in situ data is needed in order to study mesoscale sea surface phenomena linked to flows through straits, eddies, jet currents, upwelling etc. The collection of standard physical oceanographic information in the field is costly, time consuming and cannot constitute a simultaneous representation of the observations in the open sea areas. This is, especially evident in cases of practical interest where quick decisions are required, as for instance in the case of contaminant transport and dispersion. The use of satellite infrared data in oceanographic studies has a unique potential in providing mesoscale and synoptic sea surface temperature information concerning flow patterns.
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