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اثر موقع واتجاه محور الاخدود وارتفاعه في شدة المنخفضات الجبهوية في العراق == Effect Site And Direction Trough Axis And Height In Severity Frontal Depressions In Iraq
Author name:
احمد ماجد عباس الجبوري
Supervisor name:
يوسف محمد علي حاتم الهذال
General topic:
Geography
Specific topic:
Natural Geography
Degree:
Master
University:
University of Baghdad - Ibn Rushd College Of Education For Human Sciences
Language:
Arabic
University location:
Baghdad
First pages:
10T1494 - p.pdf
Abstract:
Aim of the study in the search for effect of site and direction of axis of the trough and a height in intensity frontal depression in Iraq , in order to find out after more sites and trends axis trough of other , as it was relying on it on the analysis of weather maps daily compared to basis standard rain that was extracted by using equation of the standard deviation , and from which reached into three categories rain (above average and close of it and without it) , this was dependent the data rain daily period (1995 - 2008) for two observations (00) GMT and (1200) GMT , besides the analysis of weather maps that locked within three , the level (500) mille bar to locate the direction of axis of the trough , level of (1000) mille bar to select type of the frontal system , the level (850) mille bar it has been approved to determine the depth of the frontal system. Has been shown by the product of the study that Iraq is affected by three sites of troughs , the first site trough western and the location west of Iraq , the second site trough above the study area and this type of websites that cover the study area fully to almost the entire , as for the third is the site trough the east and the location of the east of Iraq , as to the direction of axis of the trough has appeared also three axes : the first axis of the trough north - south (vertical) , the second axis northeastern - southwestern(lying down on the right) , the third axis northwest - southeastern (lying down of the left). During the reached concluded that the site trough western (west Iraq) was the most locations influential in frontal depression accompanied by category rain over the average , interpreted so that Iraq is the bottom of the arm of the rising the trough prevails operations escalation antenna formed frontal depression surface , it also shows that the axis of the trough north - south (vertical) is the other also more hubs trough influential in frontal depression , because of the distance short broken of pole to tropical and gets amendment to the characteristics of the block airway or might be modified little , more over it became high trough its effect on the amount of rain falling , as the appeared trough analysis weather maps daily for high trough rise in the month of October November April and May , increasingly height in observation (1200) GMT with him in the (00) GMT , often accompanied by close of rain and without the rain , drop high during the winter of November , January and February , drop high observation (1200) GMT with him in the (00) GMT the result of the control of the block aerobic polar and deepen the trough often accompanied by category rain over the average. This is influenced by Iraq kinds many of frontal depression deep an shallow of Mediterranean low , Sudanese and integrated low , as it has been through search repeating this depression reached the presence of an increase in the frequency and Sudanese low the record ranked first frequently by analyzing the weather maps , accompanied by category rain above average and close of it and without it , according to the analysis rain data , comes the med - low to score a second place , and integrated rank the third and final. As demonstrated the study using methods statistical , according to what showed the result of the coefficient of person correlation between the site and direction of axis trough and the frontal depression and the relationship rain over the rate and close of it , indicated the presence of relationship link centrifugal strong the rain over the rate and site trough western , and weak to medium with sit trough above the study of area also the case from the rain close to rate , the relationship between the rain and direction of axis of the trough the back of a relationship link centrifugal intermediate between the rain over the rate and close of the amended with the axis of the trough north - south (vertical) and axis northeastern - southwestern (italic left ( , centrifugal weak with axis trough northwest - southeastern (italic right
