نتایج جستجو برای: climate effects

تعداد نتایج: 1688884  

Journal: :Proceedings. Biological sciences 2010
Leif Christian Stige Geir Ottersen Padmini Dalpadado Kung-Sik Chan Dag Ø Hjermann Dmitry L Lajus Natalia A Yaragina Nils Chr Stenseth

Interactions within and between species complicate quantification of climate effects, by causing indirect, often delayed, effects of climate fluctuations and compensation of mortality. Here we identify direct and indirect climate effects by analysing unique Russian time-series data from the Norwegian Sea-Barents Sea ecosystem on the first life stages of cod, capelin, herring and haddock, their ...

2013
H. Lee T. Park H. Jeong

Recently, the effects of global climate changes have become top concerns for governments’ decision making regarding infrastructure investments. Extreme weather events that exceed the capacity of existing systems have considerably increased in frequency, and the potential effects of changing trends in temperature and rainfall on infrastructure are difficult to ignore. It is essential for governm...

2015
Marther W. Ngigi Ulrike Muller Regina Birner

This study examines the impact of multiple shocks on assets by employing two waves of a panel data set of 360 rural households in three agro-ecological zones in Kenya. To control for unobserved heterogeneity, a ‘within’ household fixed effects model was employed. One major finding is that climatic shocks negatively affect households’ livestock holdings -apart from small ruminant and non-ruminan...

Journal: :توسعه کارآفرینی 0
محمد رضا اکبری دانشجوی دکتری کشاورزی دانشگاه تهران احمد رضوانفر استاد گروه ترویج و آموزش کشاورزی، دانشکده اقتصاد و توسعه کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران امیر علم بیگی استادیار گروه ترویج و آموزش کشاورزی، دانشکده اقتصاد و توسعه کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

the agricultural sector was affected by climate change more than every other sectors, because it is close to nature. in other words, the effects of climate change were been on the farmers’ livelihood. farmers need to entrepreneurial changes for adaptation to climate change in their livelihood. hence, investigation of farmers’ entrepreneurial behavior in response to climate change was the main p...

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Climate change is one of the most important challenges that has affected various parts of human life on Earth. In the present study, in order to investigate the climate change, three synoptic stations of Karaj, Mehrabad and Dashan Tepeh with the help of the statistical statistic downscaling model (SDSM) model were used to predict the statistical period of 2016-2045. Finally, the effects of clim...

According to the reports of the International Panel Climate Change (IPCC) there is no doubt about climate change occurring. All ecosystems on the earth have being concerned by the effects of climate change. Urmia lake basin and its rivers exposed to numerous anthropogenic stressors such as hydrological, morphological, connectivity and water quality pressures. The main objective of this study is...

Journal: :مدیریت بازرگانی 0
شهریار عزیزی استادیار مدیریت بازرگانی (بازاریابی) ـ دانشکده مدیریت و حسابداری ـ دانشگاه شهید بهشتی احمد روستا استادیار مدیریت بازرگانی ـ دانشکده مدیریت و حسابداری ـ دانشگاه شهید بهشتی

this study was performed based on 482 questionnaires from 30 food companies' salespeople which contained 39-items. for testing the model, multilevel approach and hlm 6.05 was used. the main effects of basic physiological needs (relatedness, competency and autonomy) and moderation and main effects of competitive climate and collective sales efficacy were investigated. results showed related...

2006
Mustafa Babiker Richard S. Eckaus

This paper models the unemployment effects of restrictions on greenhouse gas emissions, embodying two of the most significant types of short term economic imperfections that generate unemployment: sectoral rigidities in labor mobility and sectoral rigidities in wage adjustments. A labor policy is also analyzed that would reduce the direct negative economic effects of the emissions restrictions....

2015
Joshua S. Graff Zivin Solomon M. Hsiang Matthew J. Neidell Eli Berman Gordon Dahl Wolfram Schlenker

We provide the first estimates of the potential impact of climate change on human capital, focusing on the impacts from both short-run weather and long-run climate. Exploiting the longitudinal structure of the NLSY79 and random fluctuations in weather across interviews, we identify the effect of temperature in models with child-specific fixed effects. We find that short-run changes in temperatu...

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