نتایج جستجو برای: global warming has brought about changes in meteorological variable time series these changes

تعداد نتایج: 17534456  

براتی, محمد, رجبی, جلیل, عزیزی, مریم,

Introduction: Climate changes are one of the factors associated with human activities for the destruction of the ecosystem. This factor leads to global warming, changing rainfall patterns, increasing the amount and severity of climate factors such as storms, and rising sea levels. Parasites are also an integral part of this ecosystem; therefore, the present study considered the effect of climat...

ژورنال: اکوبیولوژی تالاب 2020
Babadi, Mohammad , Borna, Reza , Ghorbanian, Gabrail , Zohourian, Manije ,

In recent years, global warming and climate change have been associated with dire consequences for human societies. Changes in climate patterns can lead to severe floods, extreme heat and cold, more frequent droughts, and global warming. This increase in global warming has upset the Earthchr('39')s climate balance and caused widespread climate change in most parts of the world, known as climate...

Considering the vast application of sea surface temperature in climatic and oceanic investigations, this parameter was studied in Oman Sea from 1986 to 2015. The SST was surveyed using trend analysis and Global and local Moran’s I spatial autocorrelation. In trend analysis, the Mann-Kendall test was used to determine the trend of SST changes and the Sen's Estimator method was used to examine th...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده زبانهای خارجی 1390

this study was conducted to investigate the impact of podcasts as a learning and teaching tool on iranian efl learners’ motivation for listening as well as on their listening comprehension ability. the study also investigated the learners’ perception towards listening to podcasts and examined whether the learners were likely to accept podcasts. out of fifty-five intermediate learners studying e...

Journal: :پژوهش های جغرافیای طبیعی 0
قاسم عزیزی دانشیار اقلیم شناسی، دانشکده جغرافیا، دانشگاه تهران طاهر صفرراد استادیار اقلیم شناسی، دانشکدة علوم انسانی و اجتماعی، دانشگاه مازندران حسین محمدی استاد اقلیم شناسی، دانشکدة جغرافیا، دانشگاه تهران حسنعلی فرجی سبکبار دانشیار جغرافیای انسانی، دانشکده جغرافیا، دانشگاه تهران

introduction there are significant differences in the spatial distribution of the iran annual precipitation. this is resulted from spatial behavior of precipitation in the one hand and variation in the sources of precipitation on the other. the lack of adequate distribution of meteorological stations and the unavailability of long-term statistics of precipitation makes the analysis of precipita...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده ادبیات و زبانهای خارجی 1390

bserved by many teachers that most of the time, mumbling and searching for their intended words, students complain why they have forgotten the words they have learned in the previous semesters. they ask for some new ways that may help them to recall and apply the learned words more efficiently, since as they declare one of the most important skills in foreign language learning is having a g...

Journal: :فیزیک زمین و فضا 0
عبدالرضا صفری دانشیار، گروه مهندسی نقشه برداری، پردیس دانشکده¬های فنی دانشگاه تهران، ایران محمدعلی شریفی استادیار، گروه مهندسی نقشه¬برداری، پردیس دانشکده¬های فنی دانشگاه تهران، ایران حمیدرضا باقری دانشجوی کارشناسی ارشد ژئودزی گروه مهندسی نقشه¬برداری، پردیس دانشکده¬های فنی دانشگاه تهران، ایران یحیی الله توکلی دانشجوی دکتری ژئودزی گروه مهندسی نقشه¬برداری، پردیس دانشکده¬های فنی دانشگاه تهران، ایران

the grace mission has provided scientific community time-variable gravity field solutions with high precision and on a global scale. the grace mission was launched on march 2003. this mission consists of two satellites that pursue each other in their orbit. distance between two satellites in orbit is measured continuously to an accuracy of better than 1 micron using kbr system placed in satelli...

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

target tracking is the tracking of an object in an image sequence. target tracking in image sequence consists of two different parts: 1- moving target detection 2- tracking of moving target. in some of the tracking algorithms these two parts are combined as a single algorithm. the main goal in this thesis is to provide a new framework for effective tracking of different kinds of moving target...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
K L Smith H A Ruhl B J Bett D S M Billett R S Lampitt R S Kaufmann

Climate variation affects surface ocean processes and the production of organic carbon, which ultimately comprises the primary food supply to the deep-sea ecosystems that occupy approximately 60% of the Earth's surface. Warming trends in atmospheric and upper ocean temperatures, attributed to anthropogenic influence, have occurred over the past four decades. Changes in upper ocean temperature i...

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