نتایج جستجو برای: moderate climate

تعداد نتایج: 348325  

A Firoozi Chahak , M Poursadeghiyan , MH Beheshti,

Background: Today, with the development of technology, the presence and role of human resources has been highlighted in industrial environments. Hence, the importance of safety culture is growing. Mining is the one of the most dangerous occupations. Therefore, this study was performed to determine the effect of health, safety, and environment management system (HSE-MS) on safety climate in one ...

2007
Julien Emile-Geay Mark Cane Richard Seager Alexey Kaplan Peter Almasi

Using a climate model of intermediate complexity, we simulate the response of the El Niño-Southern Oscillation (ENSO) system to solar and orbital forcing over the Holocene. Solar forcing is reconstructed from radiocarbon production rate data, using various scaling factors to account for the conflicting estimates of solar irradiance variability. As estimates of the difference since the Maun-der ...

2007
Julien Emile-Geay Mark Cane Richard Seager Alexey Kaplan Peter Almasi

[1] Using a climate model of intermediate complexity, we simulate the response of the El Niño–Southern Oscillation (ENSO) system to solar and orbital forcing over the Holocene. Solar forcing is reconstructed from radiocarbon production rate data, using various scaling factors to account for the conflicting estimates of solar irradiance variability. As estimates of the difference since the Maund...

2004
Maryam Miradi

The most unacceptable structural damage of porous asphalt top layers is the loss of stones leading to raveling. Therefore it is important to predict when the porous asphalt top layer will achieve a critical level of raveling so as to allocate funds for necessary maintenance. SHRP-NL database including eight provinces of the Netherlands was used as the data resource. Artificial Neural Network (A...

Journal: :مرتع و آبخیزداری 0
مسلم برجی حسن گاویار کارشناس ارشد آبخیزداری، دانشکده منابع طبیعی، دانشگاه تهران، ایران هادی اسکندری دامنه دانشجوی دکتری بیابان زدایی، دانشکده منابع طبیعی، دانشگاه هرمزگان، ایران. حسن خسروی استادیار دانشکده منابع طبیعی، دانشگاه تهران، ایران

nowadays, temperature increase, rainfall decrease and its effect on the time dynamics of carbon fixation cycle still are faced by many uncertainties. net primary production (npp) is one of the main factors of carbon cycle; precipitation and temperature measurement are known as two useful tools to study different ecosystems stability and resilience in terms of climate. hence, in this study, npp ...

Journal: :مرتع و آبخیزداری 0
سید هدایت پروری اصل دانش آموخته کارشناسی ارشد رشته بیابان¬زدایی، دانشکده منابع طبیعی، دانشگاه زابل، ایران احمد پهلوانروی استادیار، دانشکده منابع طبیعی، دانشگاه زابل، ایران علیرضا مقدم نیا استادیار، دانشکده منابع طبیعی، دانشگاه زابل، ایران

desertification is the consequence of series of processes in which climate change and human activities are more important factors than others. arid and semi-arid areas have occupied most parts of iran. sistan region is one of arid areas of iran where wind erosion is an important factor of land degradation and soil deterioration. for classification of desertification intensity, several methods h...

2011
Junhua Hu Zhigang Jiang

Global climate change appears to be one of the main threats to biodiversity in the near future and is already affecting the distribution of many species. Currently threatened species are a special concern while the extent to which they are sensitive to climate change remains uncertain. Przewalski's gazelle (Procapra przewalskii) is classified as endangered and a conservation focus on the Qingha...

2016
Benjamin Sultan Marco Gaetani

West Africa is known to be particularly vulnerable to climate change due to high climate variability, high reliance on rain-fed agriculture, and limited economic and institutional capacity to respond to climate variability and change. In this context, better knowledge of how climate will change in West Africa and how such changes will impact crop productivity is crucial to inform policies that ...

2013
Junsheng Li Xin Lin Anping Chen Townsend Peterson Keping Ma Monika Bertzky Philippe Ciais Valerie Kapos Changhui Peng Benjamin Poulter

In an era when global biodiversity is increasingly impacted by rapidly changing climate, efforts to conserve global biodiversity may be compromised if we do not consider the uneven distribution of climate-induced threats. Here, via a novel application of an aggregate Regional Climate Change Index (RCCI) that combines changes in mean annual temperature and precipitation with changes in their int...

Journal: :Nature communications 2015
György Kröel-Dulay Johannes Ransijn Inger Kappel Schmidt Claus Beier Paolo De Angelis Giovanbattista de Dato Jeffrey S Dukes Bridget Emmett Marc Estiarte János Garadnai Jane Kongstad Edit Kovács-Láng Klaus Steenberg Larsen Dario Liberati Romà Ogaya Torben Riis-Nielsen Andrew R Smith Alwyn Sowerby Albert Tietema Josep Penuelas

Human domination of the biosphere includes changes to disturbance regimes, which push many ecosystems towards early-successional states. Ecological theory predicts that early-successional ecosystems are more sensitive to perturbations than mature systems, but little evidence supports this relationship for the perturbation of climate change. Here we show that vegetation (abundance, species richn...

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