الفهرس 
Title : Numerical and dynamical analysis on desert depressions over North Africa
ContentsOnly 14 pages are availabe for public view
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Abstract
This thesis aimed to investigate the effect of the perturbations in mediterranean Sea surface temperature (SST) on the development and track of two desert depressions that occurred over North Africa and affected the weather of Egypt, one of these cases occurs at April 2007 while the second at March 2003. In case April 2007 we found that a warmer sea increases the surface latent heat fluxes and the moisture convergence, favoring development of convection in the storm. An obvious decrease of mean sea level pressure (MSLP) occurs together with increasing of surface winds. Also, a significant change was observed in the trajectory of the cyclone when compared to the control simulation. While the pattern of dust concentration associated with the two runs (SST0, SST9) are nearly equal, the amount of dust concentration in SST9 is greater than SST0 due to increasing surface wind speed. In contrary to case April 2007, the results of case March 2003 illustrate that the mean sea level pressure, surface winds and cyclone trajectory are not sensitive to changes in SST