نتایج جستجو برای: dust and sand storms

تعداد نتایج: 16843625  

2016
Helena Krasnov Itai Kloog Michael Friger Itzhak Katra

Dust storms are a common phenomenon in arid and semi-arid areas, and their impacts on both physical and human environments are of great interest. Number of studies have associated atmospheric PM pollution in urban environments with origin in natural soil/dust, but less evaluated the dust spatial patterns over a city. We aimed to analyze the spatial-temporal behavior of PM concentrations over th...

Aims & Backgrounds: Considering the fact that a large part of our country is in arid and semi-arid regions and every year wind erosion and dust storms cause significant damages to the country's bio-economic resources, it is necessary to study this phenomenon. This study investigated the erosion rate of geomorphological facies of Gonabad city in relation to wind erosion. Methodology: The wind er...

Journal: :World Journal Of Advanced Research and Reviews 2022

Propagation mechanisms are very complex and diverse, because of the separation between receiver transmitter, attenuation (reduction or loss) signal strength occurs. Field study will be conducted in amid north region Libya (Bani Walid), which has high wind speed, loss, desert climate, frequent dust sand storms. This phenomenon actually influenced on wireless communication systems (GSM signal), n...

2003
Duane Ono Scott Weaver Ken Richmond

An extensive sand flux monitoring network was installed on the dry lake bed at Owens Lake, California to determine hourly PM-10 emissions. The network consisted of 135 co-located electronic and passive sand flux samplers covering 135 square kilometers of the lake bed. The network measured the hourly sand flux at each site for 30 months. Previous researchers found that PM-10 emissions due to win...

2007
W. M. Farrell G. T. Delory S. K. Atreya T. L. Jackson

Introduction: Mars is a planet of many apparent dichotomies in topography, atmospheric evolution , hydrology, and geomagnetism. We describe yet another set of extremes in the area of atmospheric chemistry. While solar photons in fair-weather are a known and well-studied driver of Martian chemistry, there is increasing evidence that electro-chemistry unique to dust storms may be a second new dri...

Journal: :Frontiers in Environmental Science 2022

Dust storms bring a large quantity of dust aerosols from arid and semi-arid regions the Earth. However, real-time concentration data for in regions, important wind erosion studies, are still limited. Here, temporal variation airborne concentrations Mogao Grottoes, Northwest China, during monitoring period February to October 2012 typical under different directions were analyzed. Results reveal ...

   Dust phenomenon is a natural occurrence that occurs widespread in arid and semi-arid regions of the world, especially in the sub-equatorial latitudes. This phenomenon is among the greatest environmental problems in the world. The release of this destructive climatic phenomenon in a scattered manner in the atmosphere varies in size, time and concentration. Since this phenomenon is influenced...

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