TY - JOUR ID - TI - Determined Seasonal Variation of Polar Jet Streams over Baghdad City for period 2012-2014 AU - Ramia M. Mohamed AU - Ahmed S. Hassan PY - 2020 VL - 31 IS - 1 SP - 1 EP - 8 JO - Al-Mustansiriyah Journal of Science مجلة علوم المستنصرية SN - 1814635X 25213520 AB - Analysis of the jet stream is diagnostic over Baghdad for period studies 2012 to 2014 using Radiosonde data and synoptic charts. The source of data is the Iraq Meteorological Organization and Seismology (IMOS). The most frequent occurrences of a jet stream are in April and July at 500 hPa equal to 13 times, at 300 hPa the highest frequency of the jet stream is in May equal to 14 times. This study showed that the incidence of jet streams became fluctuating, increasing and decreasing, as the least occurrences were in 2012 and gradually increased in 2014, when the highest incidence of jet streams was recorded in 2014. The most prominent results of the current jet current determination used by the synoptic maps through the fulfillment of all conditions or the fulfillment of part of the conditions. In the event that all conditions are met due to the expansion of the Hadley cell when it hits the middle condition. The results were produced if some conditions were met and in most study cases that the jet stream formed over Europe and continues to move until it reaches the Mediterranean Sea, then there will be a crossroads either over Turkey and it will be strong and in the case of growth or heading towards Iraq, in this case, it will be weak and in Decay condition.Keywords: Seasonal variation, Jet stream, Climate variation

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