Abstract

The climatologically records of hourly surface air temperature and pressure collected at Port Said weather land stations during the period from 1978 to 2008 are used to study the long term variability of both parameters. January, December and February were considered the coldest months through the years of the whole period with occurrence of about 65.5, 13.8 and 20.7% values, respectively. In the opposite side, August is considered the hottest month with 82.8% occurrence through all the years while July represented the second hottest month with 17.2% occurrence values. July has a lowest value in pressure with percentage of occurrence 73.3% during the whole period. August advantage of the second grade with percentage of occurrence equal 23.3%. The months of highest values of pressure is distributed from November to March. December and January are considered as highest months of pressure values with percentage of occurrence equal 33.3 and 43.3%, respectively. The existence of any significant trends in the monthly, seasonally and annual patterns of temperature and pressure within the region were studied. Also, inter annual patterns of the surface temperature and pressure was explained by using spectral analysis. Finally, a discussion between the results detected at Alexandria and Port Said was done.

Key words: Port Said, Egypt, air temperature, atmospheric pressure, trend.