نتایج جستجو برای: population growth and climate changes

تعداد نتایج: 17112870  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده ادبیات و علوم انسانی 1391

abstract governing was disorganized for years, when mongols attached to iran and it caused to clearing way for interference of mongols princes. dispatching of holaku to the west culminated in establishing iilkhanan government. holakus activities in destruction of abbaasis government and activities which shows his staying in iran, made force oulus juji to comparison against iilkhanis gover...

Journal: :Global change biology 2016
Kevin R Ford Constance A Harrington Sheel Bansal Peter J Gould J Bradley St Clair

Under climate change, the reduction of frost risk, onset of warm temperatures and depletion of soil moisture are all likely to occur earlier in the year in many temperate regions. The resilience of tree species will depend on their ability to track these changes in climate with shifts in phenology that lead to earlier growth initiation in the spring. Exposure to warm temperatures ('forcing') ty...

2012
Susan Hanson Robert Nicholls

This paper presents a first estimate of the exposure of the world’s large port cities (population exceeding one million inhabitants in 2005) to coastal flooding due to sea-level rise and storm surge now and in the 2070s, taking into account scenarios of socio-economic and climate changes. The analysis suggests that about 40 million people (0.6% of the global population or roughly 1 in 10 of the...

2015
Camilo Mora Iain R. Caldwell Jamie M. Caldwell Micah R. Fisher Brandon M. Genco Steven W. Running Georgina M Mace

Ongoing climate change can alter conditions for plant growth, in turn affecting ecological and social systems. While there have been considerable advances in understanding the physical aspects of climate change, comprehensive analyses integrating climate, biological, and social sciences are less common. Here we use climate projections under alternative mitigation scenarios to show how changes i...

2017
Zhao Liu Bruce Anderson Kai Yan Weihua Dong Hua Liao Peijun Shi

The frequency and intensity of extreme heat wave events have increased in the past several decades and are likely to continue to increase in the future under the influence of human-induced climate change. Exposure refers to people, property, systems, or other elements present in hazard zones that are thereby subject to potential losses. Exposure to extreme heat and changes therein are not just ...

Journal: :پژوهش های جغرافیای طبیعی 0
الهام محمدی کارشناس ارشد اقلیم‎شناسی، دانشگاه اصفهان حجت اله یزدان پناه استادیار اقلیم‎شناسی، دانشگاه اصفهان فریبا محمدی کارشناس ارشد اقلیم‎شناسی، دانشگاه اصفهان

introduction climate change generally affect all economic sectors, but the agricultural sector is the most sensitive and vulnerable sector, because crops are highly dependent on climatic resource. according to the scientific evidences, climate change in the future, especially the combined effects of rising temperatures and rising co2 concentrations in the atmosphere and increase the likelihood ...

Climate has always been changing during the lifetime of the earth, and has appeared in the form of the ice age, hurricanes, severe and sudden temperature changes, precipitation and other climatic elements, and has dramatically influenced the environment, and in some cases has caused severe changes and even destructions. Some of the most important aspects of climate changes can be found in preci...

Journal: :پژوهش های روستایی 0
مصطفی طالشی دانشیار گروه علوم جغرافیایی، دانشگاه پیام نور تهران مصطفی امیرفخریان عضو هیئت علمی پژوهشی جهاد دانشگاهی مشهد و دانشجوی دکتری جغرافیا و برنامه‏ریزی شهری، دانشگاه فردوسی مشهد

introduction spatial studies as the main tools for the detailed study of all tangible and intangible aspects of regions have special ranks among all kinds of planning. the conformity of this organization with physical environment forms the spatial structure of which is usually observed as a distributed and isotropic spatial structure, focus and polar, unbalanced and haphazard, random and balanc...

Food fish farming is regarded as one of the most important sectors of the aquaculture industry. Salmon farming is a major contributor to the growth of the aquaculture sector. Climate change is predicted to have a complex impact on aquatic ecosystems, including fisheries and aquaculture. Climate change can cause a fluctuation in water temperature of rivers, lakes, seas, and oceans. This can chan...

Journal: :Molecular ecology 2005
Christopher Irwin Smith Brian D Farrell

Pollen cores and plant and animal fossils suggest that global climate changes at the end of the last glacial period caused range expansions in organisms indigenous to the North American desert regions, but this suggestion has rarely been investigated from a population genetic perspective. In order to investigate the impact of Pleistocene climate changes and glacial/interglacial cycling on the d...

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