نتایج جستجو برای: we can mention dust storms

تعداد نتایج: 5775652  

2012
Arthur Rothstein

A farmer and his two sons during a dust storm in Cimarron County, Oklahoma, 1936, Photo: Arthur Rothstein The Dust Bowl, or the Dirty Thirties, was a period of severe dust storms causing major ecological and agricultural damage to American and Canadian prairie lands in the 1930s, particularly in 1934 and 1936. The phenomenon was caused by severe drought coupled with decades of extensive farming...

Journal: :Astrobiology 2006
Gregory T Delory William M Farrell Sushil K Atreya Nilton O Renno Ah-San Wong Steven A Cummer Davis D Sentman John R Marshall Scot C R Rafkin David C Catling

Laboratory studies, numerical simulations, and desert field tests indicate that aeolian dust transport can generate atmospheric electricity via contact electrification or "triboelectricity." In convective structures such as dust devils and dust storms, grain stratification leads to macroscopic charge separations and gives rise to an overall electric dipole moment in the aeolian feature, similar...

Journal: :iranian journal of environmental sciences 0
parya broomandi department of chemical engineering, amirkabir university of technology, tehran, iran bahram dabir department of chemical engineering, amirkabir university of technology, tehran, iran babak bonakdarpour department of chemical engineering, amirkabir university of technology, tehran, iran yousef rashidi environmental sciences research institute, shahid beheshti university, tehran, iran

dust particles have dangerous impacts on human health, the environment, and the economy. recently dust storms, originating from arabian countries, have increased remarkably, affecting western and central parts of iran.hysplit model and the mean monthly maps of aai (absorbing aerosol index), surface skin temperature, and top soil layer moisture from omi (ozone measurement instrument) have been u...

2006
Y. Zhai S. A. Cummer W. M. Farrell

[1] Recent experimental and modeling studies show that large quasi-static electric fields (2–20 kV/m) can be developed in a Martian or terrestrial dust devil as a result of contact electrification and charge separation of dust grains with different sizes and compositions. Electric discharging occurs when the maximum electric field reaches breakdown values ( 20 kV/m on Mars and 3 MV/m on Earth, ...

Extended Abstract Introduction: Dust storm is a major weather event that plays an important role in the Earth’s atmosphere and ocean surfaces. Dust storms affect marine phytoplankton, soil physical and chemical characteristics in entrainment and deposition areas, climate and radiative forcing, economic loss, and human health. They mostly originate from Introduction: Dust storm is a major weath...

ژورنال: کواترنری ایران 2018
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1-Interoduction: Air pollution has been considered as one of the global challenges. According to world health organization (WHO), dust particles are the 5th most dangerous cause of death 4.2 million in the world. According to the world meteorological organization (WMO), when the wind speed increases more than 15 m/s and the visibility decreases because of dust particles less than 1 km, it is c...

Journal: Pollution 2017

Dust particles have dangerous impacts on human health, the environment, and the economy. Recently dust storms, originating from Arabian countries, have increased remarkably, affecting western and central parts of Iran.HYSPLIT model and the mean monthly maps of AAI (Absorbing Aerosol Index), surface skin temperature, and top soil layer moisture from OMI (Ozone Measurement Instrument) have been u...

Introduction: In recent years, frequency and intensity of dust storms have been increased because of human destructive activities and caused significant loss in different aspects of hygienic and health, environmental and socio-economic sections. Therefore, detection and trace of dust storms in shortest time is the first effective step in preparation and implementation of strategic and operation...

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...

2011
C I Calle

The electrical activity present in the environment near the surfaces of Mars and the moon has very different origins and presents a challenge to manned and robotic planetary exploration missions. Mars is covered with a layer of dust that has been redistributed throughout the entire planet by global dust storms. Dust, levitated by these storms as well as by the frequent dust devils, is expected ...

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