Abstract
Inter Tropical Convergence Zone (ITCZ) is one of the major systems in making the general circulation of atmosphere. Many climatologists believe that the starting point of the general circulation of atmosphere is from this system. It seems that the annual displacement of this system is coordinated with the sun. In this study we have tried to investigate the annual and seasonal displacement of this system within the range of Middle East, especially within the range of longitude of Iran in a long period of time (statistical period of 66 years). This is the first study in the field of ITCZ monthly and annual long-term changes in Iran. In this study, not only his exact position on Africa and South West Asia ITCZ is determined, it also shows the change in the period of 66 years. These results can also be used on regional climate changes. For this purpose topographic and surface level pressure maps are 1000 and 850 hpa and they were approximately extracted monthly for 12 months of the year from 1948 to 2013 and also they were extracted from the National Oceanic and Atmospheric Ad-ministration Site in America within the range of 30° west to 110° east, and they were extracted by using the flow map of location (ITCZ). Due to the sudden displacement in the ITCZ bar path in the two seasons of summer and winter, on the Middle East region, the direct impact of this displacement on sudden changes of seasons, the start and end of untimely rains, its impacts on agricultural products and water recourses of the country so all these reasons are essential that this phenomenon should be studied carefully. Studies have shown that ITCZ is not a coordinated solar system and its displacement is not coordinate with the apparent annual displacement of the sun. October is the only month of ITCZ that within the range of 10 northern degrees in all the ranges of longitude 20° west to 110° east has an approximate orbital shape. In 6 months of the year (from November to April) (ITCZ) within the range of 30° east or 110° east, it is entirely located in the Southern Hemisphere and on the contrary in 5 months from May to September (ITCZ) within the range of 30° east to 110° east, it is entirely located in the Northern Hemisphere. And in this period, ITCZ has its highest Northern movement on the Earth. So that at the foot of the Himalayas it moves to 30° north. Within the range of Africa, ITCZ never enters the Southern Hemisphere at any time of the year. And the interesting phenomenon of severe refraction in the way of ITCZ, during the cold period, is within the range of Ethiopia and ITCZ has approximately redirected for Meridian and enters the Southern Hemisphere.
Highlights
Inter Tropical Convergence Zone (ITCZ) is one of the constructive elements of general circulation of the atmosphere
The sun is in its second equinox and it is expected that the position of ITCZ, comply with the deployment of the sun to be located within the range of equator
5) May and November are the months of changes in the pattern of structure (ITCZ) and the displacement is severe in the position of ITCZ within the range of 35 ̊ to 110 ̊ east (The Middle East and Southeast Asia)
Summary
Inter Tropical Convergence Zone (ITCZ) is one of the constructive elements of general circulation of the atmosphere. The starting point of general circulation of atmosphere is from this system This system complies with the monthly and seasonal changes of the sun, moves to the northern and southern latitudes and affects the general circulation of the atmosphere. For example in late spring and all summer, the Northern hemisphere, with increasing intensity of solar radiation in the Northern margin of equator, Inter Tropical Convergence Zone (ITCZ) moves to more Northern latitudes [1]. This system, like all other systems, has unique features that cannot be seen in other systems. Farther south in the Sahel and southern fringes of the Sahara, the rainy season associated with north ward movement of the ITCZ and invasion of southerly warm and moist air from
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
