Abstract
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Eman Shafik Magahed
Influence of circulation indices upon winter temperature variability in Egypt
Trends of winter surface air temperature anomalies, WSATA, are investigated using data obtained from
13 monitoring stations. The analysis is performed in two steps one deals with separate stations
independently and the other deals with stations’ groups. Groups’ anomalies are correlated to circulation
indices showing negative correlation between temperature with North Atlantic Oscillations and positive
one with Mediterranean Oscillation Index. Both power analysis and frequency distribution analysis are
applied. The results show existence of Schwabe, Hale and Gleissberg cycles and declare that there are no
critical thermal changes of climate in Egypt. It is concluded that the temperature changes during the past
three decades are not only because of the human activity but the extraterrestrial impacts as well |