Sunshine duration study within the Mediterranean area

Summary The data information of sunshine duration for two different areas on the northern Mediterranean coast are examined. The data concern the same ten years (1968–77) time period, for both areas.Using the daily values, the sunshine duration is studied for each area and a comparison between them is performed.An attempt is made to explain their differences based on the frequencies and trajectories of the weather systems passing over the two areas, and generally over the Mediterranean area.A special reference is made for the months of April, May, September and October, that is, before and after the summer period, in order to identify sufficient sunshine duration periods.