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تحليل ودراسة تغيرات الغطاء الغيمي فوق مدينة بغداد باستخدام بيانات المركز الاوربي للتنبؤات متوسطة المدى == Analysis and Study the variation of cloud cover over Bagdad City using European Center Medial Weather for casting data
Author name:
حسن محمود عزيز الخفاجي
Supervisor name:
سعدي عبد الرزاق عبد الوهاب
General topic:
Meteorology
Specific topic:
Atmospheric Sciences
Degree:
Master
University:
Mustansiriyah University - College Of Science - Department Of Atmospheric Sciences
Language:
Arabic
University location:
Baghdad
First pages:
32T67 - p.pdf
Abstract:
Human use cloud cover from Humanity beginning as simple and precise way to predicate another weather element like precipitation, temperature and wind that because of simplicity see cloud cover while the science developed more there for depending on cloud cover become more through knowing the type of cloud and shape and height with climate changing followed that observing station start built and also systems able to observe cloud cover from surface in addition from space by using satellite able to take Image to different location of longitude and latitude .Cloud cover is strong signal to express about amount of precipitation that measuring on the surface there for data about total cloud taken for three levels (high, middle, and low) clouds over Bagdad city for rainy season from Uruapan medium Rang for casting (ECMWF) for period (1980 to 2009) and ales data taken for temperature and solar radiation from same web that data compared by data took from Iraqi weather and seismology for same period.The time changing of total cloud cover and high, middle, and low cloud cover were studied in addition the time changing of rain and temperature and solar radiation while the value of highest, lowest standard derivation in addition to the direction of these meteorology variables so that this work showed the direction of total cloud cover was negative and equal ( - 0.0006) also the direction of high cloud was positive and equal (0.0003) while the direction of middle cloud cover was negative and equal ( - 0.0007) that was same with low cloud cover had negative direction with value ( - 0.0004). - 015 - This work gave relationship between total cloud cover and rain value while the value of correlation factor between them was (0.26) that this work showed the relationship between total cloud cover and temperature while the correlation factor was negative value ( - 0.44) while the relationship between total cloud cover and solar radiation founded negative value correlation factor ( - 032), and this work showed the value of precipitation and its type connected mainly with cloud type that gave this precipitation there for at this work analyze the repetition of type of cloud cover Bagdad city for period from (2005 to 2010) to two observation timings analyzer showed, that highest repetition for cloud for observation at time (00GMT) at this time the type of cloud was (Altocumulus) while the lowest repetition was low cloud (stratus) type while the highest repetition for timing (12GMT) with cloud type was middle cloud (Altocumulus) while lowest repetition for high level cloud type (Cirrocumulus).This work showed decrease by seasonally cloud cover and itsrelationship with others parameter some time direct and another indirect as before that may be belong to cloud stage may be in stag of growing or diminish or in middle stage or end.
