نتایج جستجو برای: cyclones frequency in the cyclogenesis centers

تعداد نتایج: 21247856  

Journal: :فیزیک زمین و فضا 0
علیرضا محمدنژاد استادیار، گروه فیزیک، دانشکده علوم دانشگاه بیرجند، ایران فرهنگ احمدی گیوی دانشیار، گروه فیزیک فضا، موسسه ژئوفیزیک دانشکاه تهران، ایران پرویز ایران نژاد دانشیار، گروه فیزیک فضا، موسسه ژئوفیزیک دانشکاه تهران، ایران

the areas of the world that have mediterranean style climate are found at about 35 degrees north and south of the equator, on the western sides of continents. the distinctive feature of this climate is the small amount of rain in the summer. overall, the climate has a moderate amount of rainfall and warm winters and hot summers and. the climate of the mediterranean region is conditioned by its ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1388

a major concern in the last few years has been the fact that the cultural centers are keeping distance with what they have been established for and instead of reproducing the hegemony, they have turned into a place for resistance and reproduction of resistance against hegemony. because the cultural centers, as urban public spaces in the last two decades, have been the subject of ideological dis...

Journal: :تحقیقات جغرافیایی 0
سعید موحدی رضا کاوسی

abstractâ iran country due to laying in the desert belt on the northern hemisphere, are dry and desert climate of many parts of it predominate. due to the same location in the atmospheric loss of human life and animal life and it has an important role. and according to the moisture sources in the country and located outside of the atmospheric loss from year to year fluctuations have other roles...

Journal: :فیزیک زمین و فضا 0
تیمور علیزاده دانشگاه تهران قاسم عزیزی دانشگاه تهران علیرضا محب الحجه دانشگاه تهران فرامرز خوش اخلاق دانشگاه تهران

today, extra tropical cyclones are recognized not only for the important influence they exert on midlatitude weather conditions but also for their integral role in the earth’s climate system. (gary luckmann, 2012). extra tropical cyclones are fundamental meteorological features and play a key role in a broad range of weather phenomena. they are a central component maintaining the global atmosph...

اکبری, مهری, بیات, علی, سلیقه, محمد,

Cyclones as the most important factor in the turbulence of mid-latitude regions are low pressure centers that have one or more closed Isobaric curves. Mid-latitude cyclones are responsible for transfer of the heat and moisture between the tropics and the polar regions. Mediterranean cyclones have the most important role in Iran's rainfalls and get from different tracks to the country and affect...

Journal: :پژوهش های جغرافیای طبیعی 0
منصور جعفربیگلو فرامرز خوش اخلاق روح ا... اوجی

this research that was made on 66 cyclones in wet periods of midwest of iran in a given period (1973-2003) shows that in intense wet periods, cyclogensis centers of mediterranean sea, sudan, red sea and mesopotamia were severely active and have been very effective in rainfall of study area. such systems in general, with respect to dominant synoptic patterns, enters into study area from three ma...

2011
F. STEIN

The Adélie Land coastal region of Antarctica is one of the most prominent cyclogenesis regions in the Southern Hemisphere, and is adjacent to the continent’s most intense katabatic wind regime. However, the physical mechanisms responsible for cyclogenesis are not known. A manual analysis of cyclogenesis for the 2003–2005 period using output from the Antarctic Mesoscale Prediction System (AMPS) ...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1391

the present study aimed to investigate representation of discourse markers and metadiscourse markers in conversations and readings of general elt coursebook series used in the language centers of iran. to this aim, four elt coursebooks popularly taught in language centers of this country were analyzed based on fung and carter’s (2007) framework regarding discourse markers and hyland’s (2005) fr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تحصیلات تکمیلی صنعتی کرمان - پژوهشکده برق و کامپیوتر 1390

a phase-locked loop (pll) based frequency synthesizer is an important circuit that is used in many applications, especially in communication systems such as ethernet receivers, disk drive read/write channels, digital mobile receivers, high-speed memory interfaces, system clock recovery and wireless communication system. other than requiring good signal purity such as low phase noise and low spu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده مهندسی برق و کامپیوتر 1391

power transformers are important equipments in power systems. thus there is a large number of researches devoted of power transformers. however, there is still a demand for future investigations, especially in the field of diagnosis of transformer failures. in order to fulfill the demand, the first part reports a study case in which four main types of failures on the active part are investigate...

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