تحليل المنظومات الضغطية لأقل وأكثر الأعوام حرارة خلال المدة 1970/1971 - 1998/1999

Abstract

AbstractThe temperature in Iraq recognized with high in summer may be become50C° well low in winter to become 0C° the meager reason about that variance frequency the depressions ,also effective the through and ridges in (500 Millibar). But in some year occur fluctuation in this system, so the tempter may be high from average in some year wheel may be low in other . The aim of staudy to known many of depressions frequency and to accompany from throughs and ridges in (500Millibar) during high temperature year and low year . analysis of time series of (1970/1971-1998/1999) from its there are (1975/1976) it was lowest ,while (1998/1999) it was highest. Study area consist nineteen station in Iraq. For get conclusion depended embrace analyses approach ,analyses surface synoptic map and upper synoptic. In this search got many conclusion one of them, although there are low in average temperature in year 1975/1976 wheel the high in average temperature in 1998/2000 year but the high in monthly average is be clear so the all station recorded diversion in from general average. The high and low was be clear in spring month. The station in north and south it many effected in frequency in pressure system, so there are variance in temperature degree between high temperature year and low temperature year from the medium station in area study.