نتایج جستجو برای: regional climate change

تعداد نتایج: 859429  

2015
Noel Cressie Emily L. Kang

Climate models have become the primary tools for scientists to project climate change into the future and to understand its potential impact. Continental-scale General Circulation Models (GCMs) oversimplify the regional climate processes and geophysical features such as topography and land cover. Since the consequences of local/regional climate change are particularly relevant to natural-resour...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
سید صفدر حسینی استاد گروه اقتصاد کشاورزی، دانشکدة اقتصاد و توسعة کشاورزی، دانشگاه تهران محمدرضا نظری دانشجوی دکتری گروه اقتصاد کشاورزی، دانشکدة اقتصاد و توسعة کشاورزی، دانشگاه تهران شهاب عراقی نژاد دکتری مهندسی منابع آب و استادیار گروه آبیاری و آبادانی، دانشگاه تهران

agriculture is one of the main sectors affected by climate change. although recently some studies about the nature and size climate change effect on the physical variables of water resources and agriculture have been done, however economic perspectives and the role of adaptation strategies have been less studied empirically. the contribution of this study is modeling real economic behavior of s...

2012
Noah S. Diffenbaugh Filippo Giorgi

We use a statistical metric of multi-dimensional climate change to quantify the emergence of global climate change hotspots in the CMIP5 climate model ensemble. Our hotspot metric extends previous work through the inclusion of extreme seasonal temperature and precipitation, which exert critical influence on climate change impacts. The results identify areas of the Amazon, the Sahel and tropical...

Journal: :Biology letters 2010
Michael R Kearney Natalie J Briscoe David J Karoly Warren P Porter Melanie Norgate Paul Sunnucks

There is strong correlative evidence that human-induced climate warming is contributing to changes in the timing of natural events. Firm attribution, however, requires cause-and-effect links between observed climate change and altered phenology, together with statistical confidence that observed regional climate change is anthropogenic. We provide evidence for phenological shifts in the butterf...

2016
Tobias Luthe

Social systems in mountain regions are exposed to a number of disturbances, such as climate change. Calls for conceptual and practical approaches on how to address climate change have been taken up in the literature. The resilience concept as a comprehensive theory-driven approach to address climate change has only recently increased in importance. Limited research has been undertaken concernin...

2017
Marianne Sloth Madsen Peter L Langen Fredrik Boberg Jens Hesselbjerg Christensen

Multimodel ensembles are widely analyzed to estimate the range of future regional climate change projections. For an ensemble of climate models, the result is often portrayed by showing maps of the geographical distribution of the multimodel mean results and associated uncertainties represented by model spread at the grid point scale. Here we use a set of CMIP5 models to show that presenting st...

Journal: :اکو هیدرولوژی 0
حمیدرضا قره چایی دانشجوی دکتری، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج علیرضا مقدم نیا دانشیار، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج آرش ملکیان دانشیار، دانشکدۀ منابع طبیعی، دانشگاه تهران، کرج آزاده احمدی استادیار، دانشکدۀ عمران، دانشگاه صنعتی اصفهان، اصفهان

arid and semi-arid ecosystems are very sensitivity to changes. fluctuations in climate variables and increasing human activities; result in the changes in hydrological processes of these ecosystems, and consequently, their structures degradation. in this study, hydro-climatic data of the bakhtegan basin for the period of 1972–2011, were analyzed to assess effects of climate variability and huma...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2002
Roger A Pielke Gregg Marland Richard A Betts Thomas N Chase Joseph L Eastman John O Niles Dev Dutta S Niyogi Steven W Running

Our paper documents that land-use change impacts regional and global climate through the surface-energy budget, as well as through the carbon cycle. The surface-energy budget effects may be more important than the carbon-cycle effects. However, land-use impacts on climate cannot be adequately quantified with the usual metric of 'global warming potential'. A new metric is needed to quantify the ...

Journal: :journal of agricultural science and technology 2010
f. shahbazi a. a. jafarzadeh f. sarmadian m. r. neyshabouri sh. oustan

regional impact studies of the future climate change effects are necessary because projected changes in meteorological variables differ from one region to another, and different climate systems can react in varied ways to the same changes. in this study, the effects of climate change on bioclimatic deficiency were compared in two cultivation methods (irrigated and rainfed) in a semi-arid region...

2013
Erwan Monier Andrei Sokolov Adam Schlosser Jeffery Scott Xiang Gao

We present probabilistic projections of 21st century climate change over Northern Eurasia using the Massachusetts Institute of Technology (MIT) Integrated Global System Model (IGSM), an integrated assessment model that couples an Earth system model of intermediate complexity with a two-dimensional zonal-mean atmosphere to a human activity model. Regional climate change is obtained by two downsc...

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