Journal cover Journal topic
Ocean Science An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/os-2018-6
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
16 Feb 2018
Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Ocean Science (OS) and is expected to appear here in due course.
Mixed layer depth variability in the Red Sea
Cheriyeri P. Abdulla1, Mohammed A. Alsaafani1,2, Turki M. Alraddadi1, and Alaa M. Albarakati1 1Department of Marine Physics, Faculty of Marine Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
2Department of Earth & Environmental Sciences, Faculty of Science, Sana'a University, Yemen
Abstract. For the first time, a monthly climatology of mixed layer depth (MLD) in the Red Sea has been derived based on temperature profiles. The general pattern of MLD variability is clearly visible in the Red Sea, with deep MLDs during winter and shallow MLDs during summer. Transitional MLDs have been found during the spring and fall. The northern end of the Red Sea experienced deeper mixing and higher MLD, associated with the winter cooling of the high-saline surface waters. Further, the region north of 19° N experienced deep mixed layers, irrespective of the season. Wind stress plays a major role in the MLD variability of the southern Red Sea, while net heat flux and evaporation are the dominating factors in the central and northern Red Sea regions. Ocean eddies and Tokar gap winds significantly alter the MLD structure in the Red Sea. The dynamics associated with the Tokar gap winds lead to a difference of more than 20 m in the average MLD between the north and south of the Tokar axis.
Citation: Abdulla, C. P., Alsaafani, M. A., Alraddadi, T. M., and Albarakati, A. M.: Mixed layer depth variability in the Red Sea, Ocean Sci. Discuss., https://doi.org/10.5194/os-2018-6, in review, 2018.
Cheriyeri P. Abdulla et al.
Cheriyeri P. Abdulla et al.

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Short summary
For the first time in the Red Sea, a monthly climatology of mixed layer depth (MLD) has been derived based on in-situ temperature profiles. The Red Sea MLD pattern displays significant spatial and temporal variability with exceptional features. The MLD variability is dominantly driven by the wind stress in the southern part while heat exchange plays a major role in the remaining parts. The eddies and the Tokar gap summer jet winds are significantly changing the MLD of the localized regions.
For the first time in the Red Sea, a monthly climatology of mixed layer depth (MLD) has been...
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