دراسة الحالة الساينوبتيكية للعاصفة الترابية الناشئة يوم23 اذار لعام 2013

Abstract

The duststorms considered as a natural phenomena which affect positive or negative on human life in terms of both weather and climate, it can be transfer to large areas and for wide distance depending on its value and diffusion in atmosphere, while these particle is coming through natural changes on its diffusion the age of this particle vary between hours and weeks for micro scales value. In last year's the variation of dust storms became higher over Iraq and surrounded area , these area are near to northwest and west direction of Iraq which considers as arid area during summer season and characterized by its erosion which can be consider as a dust storms sores in Iraq and other neighbors countries . The most observed direction of wind in Iraq came from northwest direction (shamal) and it is so cold. while the cold front propagate over tiny particle arid area the wind carry large value of dust depending on wind speed and direction to the middle and southern area of Iraq and may be accede these land to the neighbors countries . The synoptic attitude for dust storms shows that there is a clear teleconnection with many atmospheric variables, especially with wind speed, direction, temperature and pressure system motion too. So this study construct on synoptic behavior accompanying with dust storm. The time of this study belongs to weather range, so that it will take one case study of dust storm in (23–3– 2013) because of its intensity. For obtaining a real instruction about this case the study interest in initial step for dust storm creation and the state of many variable accompanying with it. The study will construct too at latest steps in dust storms life because it show a clear vision about the variables which is intense on storm creation and the result caused by its decay. The study focuses on satellite images and meteorological data to understanding the initial state, distribution, transfer and decay of the dust storm. these factors and images are directed to show and understanding the initially state of dust storm and the separated dust after storms to connect it with climate change phenomena and future studies, the time and location properties in Iraq are studied