Summary of Abstract Submission

Abstract Submission No. IO50-04-0024PresentationOral

BOUNDARY CURRENT AND EDDIES CHARACTERISTICS IN NORTH-CENTRAL RED SEA.

Nikolaos Zarokanellos*1, Burton Jones 1

1 KAUST, Saudi Arabia

ABSTRACT :

Red Sea is one of the saltiest and warmer oceans in the world and acts as inverted estuary. Until recently most studies of the Red Sea focused on large-scale circulation. Numerical simulations of physical dynamics, remote-sensing studies of chlorophyll concentration and sea surface height in the Red Sea indicate that eddies are important in upper circulation of the sea (Raitsos et al., 2013; Yao et al., 2014a; Zhan et al., 2014). Eddies are able to transfer nutrients, heat, salt and carbon. This study focuses on north-central Red Sea (NCRS) between 22o 15′N and 23o 30′N where recurrent mesoscale eddies are observed. Two high-resolution surveys were carried out in the north-central Red Sea in November 2013 and April 2014. The aim of these studies was to characterize the recurrent eddies observed in the NCRS using in-situ and satellite observations. The eastern boundary current might establish the proper pre-conditions for eddy genesis. An east-west baroclinic gradient may contribute to the formation of these eddies. An eastern boundary current can cause instability and contribute energy into the system. Eddy generation and persistence also depend on atmospheric forcing and thermohaline processes. Furthermore, eddy variability affects the eddy structure, stability and biological processes associated with the eddy. Evidences show that the eastern boundary current causes a downwelling in the east side of the Arabian Peninsula with chlorophyll appears to be associated with low salinity water from south part of Red Sea.