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Analysis pressure system for low and high rainy year in Iraq during trims 1970/1971- 1998/1999 | ||
| Journal of Research Diyala humanity | ||
| Article 1, Volume 0, Issue 60, 2017, Pages 549-572 | ||
| Author | ||
| Azhar S. Hadi | ||
| Abstract | ||
| Rain in Iraq recognized annul fluctuation, So appear year humidity high rain and other dry, the reason about that variance frequency the depressions ,also effective the through and ridges in (500 Millibar). The aim of study to know many of depressions frequency and to accompany from throughs and ridges in (500Millibar) during high rain year and high dry year . analysis of time series of (1970/1971-1998/1999) from its there are (1973/1974) it was rainiest ,while (1998/1999) it was driest. 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, not all months in humidity year(1973/1974)are rainy, such as December and April its recording low rain from a average, the reason in that , the ridges in upper synoptic(500mil par) so doing to weak a depression. The tow conclusion, deferent isoyets between high rainy and low rainy year, in once year study area put between (50 to 1000) mil isoyets, while put between (zero to 400) mil in second year. | ||
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