Monthly and Seasonal Variation of the Tropopause Pressure on the Middle East

Abstract

tropopause is the natural boundary between two different atmospheric layers, that is, stratosphere and troposphere. However, both of these layers (stratosphere and troposphere) differs significantly in terms of various dynamical and chemical parameters (for example, temperature, pressure, water vapors, etc.). It is therefore necessary to study the tropopause in order to better understand the static and dynamic conditions of aforementioned atmospheric parameters. This study therefore highlights the monthly and seasonal variation of tropopause pressure over the Middle East region. For this, reanalysis data set of tropopause pressure over Middle-East through the period from 1948 to 2006 are acquired from National Centers for Environmental Prediction (NCEP). Average of monthly and seasonal tropopause pressure distribution over the study region are estimated and discussed. The results of the study show that the summer seasons and the first month of autumn season have similar tropopause pressure distribution over the study region. The results of the study also show that the distribution of tropopause pressure for summer season started as a short wave at the end of spring season. In addition, northern part of the study region has zonal distribution of tropopause pressure with the exception of summer season as well as for the first month of autumn season.