نتایج جستجو برای: scengen
تعداد نتایج: 26 فیلتر نتایج به سال:
گرمایش جهانی یکی از اساسی ترین مسائلی است که امروزه توجه بسیاری از کشورها را به خود جلب کرده است. این پدیده، به عاملی مهم در ایجاد فضای رقابت بر سر افزایش و کاهش گازهای گلخانهای تبدیل شده است. از این رو، کارشناسان گرمشدن زمین را یکی از مهمترین مشکلات محیطی، اقتصادی و سیاسی در قرن بیست و یکم قلمداد میکنند. این نوشتار تلاش دارد، پدیدۀ گرمایش جهانی و چالشهای بین المللی ناشی از آن را در چارچ...
in spite of considerable increase in the resolution of general circulation and regional models, none of these models are capable to predict and downscale the meteorological outputs in the scale of meteorological station.in this regard, different dynamical and statistical models have been developed for downscaling outputs of gcms. in this paper, grided meteorological outputs of general circulati...
today, climate change is one of the most important scientific and even the political – social issues. the causes of climate change can be divided into natural and human - made. natural factors have the long-term performance and long history, such as the cycle of solar activity, dusts and gases of volcanic eruptions, geodetic and static agents and etc. human-made factors was mainly formed and ac...
A Study of the Potential Impact of Climate Change on the Future Droughts in Iran by Using the Global Circulation Models as Outputs Gholamreza Roshan Assistant Professor in climatology, Department of Geography, Golestan University, Gorgan, Iran Mohammad Saeed Najafi MSc Student in Climatology, Faculty of Geography, Tehran University, Tehran, Iran. Extended Abstract 1- Introductio...
Extended abstract 1- Introduction Climate change is one of the problems human is facing today, and most of the scientific societies know that it is rooted in the distribution of greenhouse gases. Distribution of greenhouse gases with large volumes and in large spans has been affecting the energy budget and consequently has caused earth rapid temperature increase during the last deca...
The paper highlights challenges facing the water sector at the global and national levels. The impacts of rainfall variability on the environment and socioeconomic conditions of the Sudan were discussed. Taking into consideration factors affecting rainfall of the country like the position of the Inter-Tropical Discontinuity Zone (ITDZ), the subtropical anticyclones and climate change. Recent st...
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