CHARACTERISTICS OF THE NUMERICAL BINARY RELATIONSHIP (STATISTICAL) BETWEEN THE POSITIVE AND NEGATIVE EAWR INDEX AND THE DURATION OF SURVIVAL OF SURFACE SYSTEMS AT THE LEVEL OF 1000 MILL BARS IN THE MOSUL STATION IN IRAQ

Abstract

The study attempts to find out the effect of the pressure anomaly generated in the North Atlantic Ocean at latitude (40°N-40°W), which causes the East Atlantic-Western Russia pattern, and to identify its most important effects in increasing or decreasing the number of days of pressure systems survival through Analysis of daily weather maps of the surface level of 1000 millibars for observation (00) and during two climatic cycles, the first climatic cycle spanned (1961-1950) and the second climatic cycle (2008-2019) and the identification of the values of the correlation coefficient through the relationship between the types of pressure systems such as the atmospheric highlands, including the Siberian High The European high, the semi-tropical high, as well as the air depressions such as the Sudanese low, the integrated low, the Indian seasonal low, the Mediterranean low, and finally the West Asian seas depression and the Arabian Peninsula low, in both cases, whether they remain an extension or a secondary center and the nature of the work of the mentioned systems during the negative and positive phases of the East Atlantic Index west of Russia EAWR and what is the nature of the results obtained about the statistical relationship between them