نتایج جستجو برای: desert areas

تعداد نتایج: 414951  

Abstract Climate has an important effect on operation of the traditional building architecture and its energy consumption in desert area of Iran. Absence of water and unpleasant climate of these regions compelled people to build their houses with some strategies based on effective energy expenditure. Therefore, builders try to use natural climatic strategies for confronting hard situations. Nar...

Journal: :Int. J. Digital Earth 2008
Renchin Tsolmon Lkhamjav Ochirkhuyag Troy Sternberg

The vast expanse of the Gobi desert across the Mongolian plateau features frequent dust storms. In this isolated region remote sensing techniques can provide an effective measurement of dust storms. Brightness temperature channels 4, 5 of AVHRR/NOAA satellite data, emissive bands of MODIS/TERRA satellite data, and meteorological station measurement data were used and tested for dust and sandsto...

Journal: :مطالعات باستان شناسی 0
محمّد اسماعیل اسمعیلی جلودار دانشجوی دورة دکتری باستان¬شناسی دانشگاه تهران جواد صفی نژاد استاد دانشکدة علوم اجتماعی دانشگاه تهران

the contact between major settlements in the central plateau of iran, especially in desert areas, was not possible without having a secure communication system. in this regard, designing communication networks through constructing secure roads with halfway caravansarais in desert areas, usually without secure underground and surface water supply, needed special insights and provisions. iranians...

Journal: :مطالعات باستان شناسی 0
محمد اسماعیل اسمعیلی جلودار دانشجوی دانشگاه تهران جواد صفی نژاد دانشگاه تهران

abstract the contact between major settlements in the central plateau of iran, especially in desert areas, was not possible without having a secure communication system. in this regard, designing communication networks through constructing secure roads with halfway caravansarais in desert areas, usually without secure underground and surface water supply, needed special insights and provisions....

2010
Yoav Bashan Luz E. de-Bashan

The rapid expansion of deserts in recent decades as a result of human actions combined with climatic disasters has highlighted the necessity to understand biological processes in arid environments. Whereas physical processes and the biology of flora and fauna have been relatively well studied in marginally used arid areas, knowledge of desert soil micro-organisms remains fragmentary. This chapt...

2008
C. Mitsakou

The desert of Sahara is one of the major sources of mineral dust on Earth, producing around 2×10 8 tons/yr. Under certain weather conditions, dust particles from Saharan desert get transported over the Mediterranean Sea and most of Europe. The limiting values set by the directive EC/30/1999 of European Union can easily be exceeded by 5 the transport of desert dust particles in all south Europea...

2014
Surender Varma Vatsal Shah Biplab Banerjee Krishna Mohan Buddhiraju

Deserts are one of the major landforms on the Earth. While deserts occupy about one-fifth of Earth’s land surface, they have been studied to a much lesser extent. All over the world, desert landforms are expanding ever rapidly and more and more human settlements are finding place in desert regions for habitation. Thus, quantifying and monitoring dunes becomes more relevant from a managerial per...

Journal: :Molecular phylogenetics and evolution 2013
Matthew R Graham Jef R Jaeger Lorenzo Prendini Brett R Riddle

The distribution of Beck's Desert Scorpion, Paruroctonus becki (Gertsch and Allred, 1965), spans the 'warm' Mojave Desert and the western portion of the 'cold' Great Basin Desert. We used genetic analyses and species distribution modeling to test whether P. becki persisted in the Great Basin Desert during the Last Glacial Maximum (LGM), or colonized the area as glacial conditions retreated and ...

Journal: :Phytopathology 2001
M L Boyd P J Cotty

ABSTRACT Aspergillus spp. in section Flavi were frequently associated with desert tree legumes in uncultivated areas of the Sonoran Desert. Of 270 samples of debris and fruits of mesquite (Prosopis spp.), ironwood (Olneya tesota), acacia (Acacia spp.), and palo verde (Cercidium and Parkinsonia spp.), 87% were positive for A. flavus (S and L strains) and A. tamarii. A. flavus was the most common...

ژورنال: علوم آب و خاک 2010
امیرحسین قره‌شیخلو, , حمیدرضا کریم‌زاده, , محمدرضا وهابی, ,

The purpose of this study was to compare the physical and chemical characteristics of soils covered with vegetation and soils without vegetation in Dagh-e- Sorkh Ardestan area.To achieve the goal, first the vegetation was classified using physiognomic method, and for each vegetation type, the distinctive area was specified for soil and vegetation sampling. Vegetation sampling was done by strati...

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