The research aim to study the temperature of the tropospause, their daily, monthly, seasonally variations. For achieving this goal, the research was based on daily radiosonde data of Baghdad station for observation 1200 z (3 pm Baghdad local time) for 12 years., The first period (1984-1989) and the second (2010-2015) for the purpose of comparison between them and follow the changes that took place in the temperature of the tropopause during the period of nearly 30 years. The research is relied on scientific analytical method to arrive at specific results, in addition to using some techniques in drawing, processing and identifying research data, including the use of the Skew-T program, to draw the daily data of radiosonde, and through these daily drawings the troposphere column has been obtained. Temperature measurements were also conducted. The daily synoptic maps of the pressure level 1000 and 500 hpa from www.noaa.gov. and www.Vortex Plymouth State .edu, were analyzed for 1200z to determine the prevailing weather conditions. The statistical analysis of the relationship between tropopause temperature with elements of surface climate (surface pressure, normal temperature, maximum temperature and relative humidity) using the regression model for multivariate regression equations, showing the amount of increase or decrease in the approved temperatures in the case of changing the values of the surface air variables. Simple correlation coefficients (Pearson) indicate strong, moderate, and sometimes weak, negative or positive relationships between tropopause temperatures and weather phenomena frequencies at the pressure level of 1000 and 500 hpa.
Volume 11 | 01-Special Issue
Pages: 1730-1740