نتایج جستجو برای: echam4

تعداد نتایج: 84  

2006
S. Wang

The impact of climate change on local discharge variability is investigated in the Suir River Catchment which is located in the south-east of Ireland. In this paper, the Rossby Centre Regional Atmospheric Model (RCA) is driven by different global climate data sets. For the past climate (1961–2000), the model is driven by ECMWF reanalysis (ERA-40) data as well as by the output of the general cir...

Journal: :آب و خاک 0
عباسی عباسی اثمری اثمری

abstract in this paper, we modeled the climate of iran for future periods. each period is a 30-years period centered on a year. the range of periods is from 2000 (i.e., 1986-2015) to 2100 (i.e., 2086-2115). this was made using 2 general circulation models (echam4 and hadcm2) and 18 ipcc scenarios. magicc-scengen was used as a tool for downscaling gcm low resolution output data. result of hadcm2...

ایمان بابائیان, شراره ملبوسی فاطمه عباسی لیلا گلی مختاری

در این مقاله شرایط اقلیم ایران در دهه‌های 2000، 2025، 2050، 2075 و 2100 با استفاده از خروجی دو مدل گردش عمومی جو HadCM2 و ECHAM4 و با در نظر گیری 18 سناریوی انتشار IPCC، مدل‌سازی شده است. از مدل MAGICC-SCENGEN برای ریزمقیاس‌نمایی داده‌های با قدرت تفکیک کم خروجی مدل‌های گردش عمومی استفاده شد. در این تحقیق به بررسی و مقایسه نتایج دو مدل HadCM2 و ECHAM4 پرداخته شده است. بر این اساس، نتایج مدل HadC...

2005
Eric P. Salathé

This study approaches the problem of downscaling global climate model simulations with an emphasis on validating and selecting global models. The downscaling method makes minimal, physically-based corrections to the global simulation while preserving much of the statistics of interannual variability in the climate model. Differences among the downscaled results for simulations of present-day cl...

2012
Pablo O. Canziani Gerardo Carbajal Benitez

Deforestation/land-use changes are major drivers of regional climate change in central South America, impacting upon Amazonia and Gran Chaco ecoregions. Most experimental and modeling studies have focused on the resulting perturbations within Amazonia. Using the Regional Climate Model PRECIS, driven by ERA-40 reanalysis and ECHAM4 Baseline model for the period 1961-2000 (40-year runs), potentia...

2005
A. Lauer J. Hendricks

The aerosol dynamics module MADE has been coupled to the general circulation model ECHAM4 to simulate the chemical composition, number concentration, and size distribution of the global submicrometer aerosol. The present publication describes the new model system ECHAM4/MADE and presents model results in comparison with observations. The new model is able to simulate the full life cycle of part...

2004
Andreas Roesch Feng Gao

[1] Moderate-Resolution Imaging Spectroradiometer (MODIS) surface albedo at high spatial and spectral resolution is compared with other remotely sensed climatologies, ground-based data, and albedos simulated with the European Center/Hamburg 4 (ECHAM4) global climate model at T42 resolution. The study demonstrates the importance of MODIS data in assessing and improving albedo parameterizations i...

Journal: :تحقیقات جغرافیایی 0
شراره ملبوسی ایمان بابائیان ایمان بابائیان فاطمه عباسی مرتضی اثمری لیلی گلی مختاری

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...

1998
A. Timmermann

On the basis of the latest greenhouse warming experiment performed with the coupled general circulation model ECHAM4/OPYC it is shown that not only the climate mean but also the statistics of higher order statistical moments respond signi cantly to greenhouse warming. In particular the El Ni~ no-Southern Oscillation (ENSO) cycle obtains more energy and a tendency towards stronger cold events ca...

2007
Tomohisa Yano Mehmet Aydin Tomokazu Haraguchi

A simulation study was carried out to describe effects of climate change on cropgrowth and irrigation water demand for a wheat-maize cropping sequence in aMediterranean environment of Turkey. Climate change scenarios were projected using dataof the three general circulation models-GCMs (CGCM2, ECHAM4 and MRI)-for theperiod of 1990 to 2100 and one regional climate model-RCM-for the period of 207...

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