نتایج جستجو برای: hadcm3 model

تعداد نتایج: 2104699  

2013
Brian Oney Björn Reineking Gregory O'Neill Juergen Kreyling

Species distribution modeling (SDM) is an important tool to assess the impact of global environmental change. Many species exhibit ecologically relevant intraspecific variation, and few studies have analyzed its relevance for SDM. Here, we compared three SDM techniques for the highly variable species Pinus contorta. First, applying a conventional SDM approach, we used MaxEnt to model the subjec...

2014
Alec M. Kretchun Robert M. Scheller Melissa S. Lucash Kenneth L. Clark John Hom Steve Van Tuyl

Disturbance regimes within temperate forests can significantly impact carbon cycling. Additionally, projected climate change in combination with multiple, interacting disturbance effects may disrupt the capacity of forests to act as carbon sinks at large spatial and temporal scales. We used a spatially explicit forest succession and disturbance model, LANDIS-II, to model the effects of climate ...

2013
Nicholas E. BARRAND Richard C.A. HINDMARSH Robert J. ARTHERN C. Rosie WILLIAMS Jérémie MOUGINOT Bernd SCHEUCHL Eric RIGNOT Stefan R.M. LIGTENBERG Michiel R. VAN DEN BROEKE Tamsin L. EDWARDS Alison J. COOK Sebastian B. SIMONSEN

The contribution to sea level to 2200 from the grounded, mainland Antarctic Peninsula ice sheet (APIS) was calculated using an ice-sheet model initialized with a new technique computing ice fluxes based on observed surface velocities, altimetry and surface mass balance, and computing volume response using a linearized method. Volume change estimates of the APIS resulting from surface massbalanc...

Journal: :desert 2015
fatemeh rabbani hossein mohammadi ghasem azizi daruosh mazaheri

climate change has direct and indirect consequences on crop production and food security. agriculture and cropproduction is one of the factors which depend on the weather conditions and it provides the human requirements inmany aspects. the objective of this study is to assess the impacts of future climatic change on irrigated rice yieldusing the ceres-rice model in the southern coast of caspia...

Journal: :جغرافیا و مخاطرات محیطی 0
سیده فاطمه معافی مدنی محمد موسوی بایگی حسین انصاری

introduction because of the vital role of water in human life, examining the phenomenon of climate change effects on drought severity and frequency is important for any area of interest. nowadays, climate researchers considers the effects of climate change and climate simulations by using the atmospheric-ocean general circulation models. to achieve the prediction of climatologically parameters,...

Journal: :PLoS ONE 2008
A. Townsend Peterson Aimee Stewart Kamal I. Mohamed Miguel B. Araújo

Global climate change and invasions by nonnative species rank among the top concerns for agents of biological loss in coming decades. Although each of these themes has seen considerable attention in the modeling and forecasting communities, their joint effects remain little explored and poorly understood. We developed ecological niche models for 1804 species from the European flora, which we pr...

2017
EDWARD ARMSTRONG PAUL VALDES JO HOUSE JOY SINGARAYER

This study investigates the impact of CO2 on the amplitude, frequency, and mechanisms of Atlantic meridional overturning circulation (AMOC) variability in millennial simulations of the HadCM3 coupled climate model. Multichannel singular spectrum analysis (MSSA) and empirical orthogonal functions (EOFs) are applied to the AMOC at four quasi-equilibrium CO2 forcings. The amount of variance explai...

Abdol Reza Bahremand Adel Sepehry Ahmad Abedi Servestani Ali Reza Massah Bavani Amir Saadatfar, Hossein Barani

Rangelands are one of the most vulnerable parts concerning the climatechanges‟ impacts. These impacts are even stronger in the arid and semi-arid areas whererangeland ecosystems are in critical conditions. Therefore, it is crucial to figure out theactual dynamics of climate variations on the rangelands. The aim of this research was todetermine climate changes in Khabr rangeland, Kerman, Iran. S...

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