photo source - by Underworth |
A dust storm or sandstorm is a meteorological phenomenon common in arid and semi-arid regions. Dust storms arise when a gust front blows loose sand and dust from a dry surface. Particles are transported by saltation and suspension, causing soil erosion from one place and deposition in another. The Sahara and drylands around the Arabian peninsula are the main source of airborne dust, with some contributions from Iran, Pakistan and India into the Arabian Sea, and China's storms deposit dust in the Pacific. It has been argued that recently, poor management of the Earth's drylands, such as neglecting the fallow system, are increasing dust storms from desert margins and changing both the local and global climate, and also impacting local economies.
You can see driving through a dust storm between Wilcania and Broken Hill, in NSW Australia,2007 (video below)
In some cases, dust and sand may be confined to a relatively shallow layer by a low-lying temperature inversion. In other instances, dust (but not sand) may be lifted as high as 20,000 feet (6,100 m) high.
Sandstorm in the Syrian desert a couple of years ago, (video below)
A sandstorm can move whole sand dunes. Dust storms can carry large amounts of dust, so much so that the leading edge of one can appear as a solid wall of dust as much as 1.6 km (1 mile) high.
Worst ever sandstorm in Riyadh,Saudi Arabia. See the buildings disappearing within a span of 3 minutes.(video below)
Dust and sand storms which come off the Sahara Desert are locally known as a simoom or simoon. The haboob is a sandstorm prevalent in the region of Sudan around Khartoum; storms are very common around Khartoum every summer. When it happens you can't see anything but a wall of sand covering your view.
Sandstorm in Niamey, Niger's Capital (video below)
Sandstorm in Niamey, Niger's Capital (video below)
The Sahara desert is a key source of dust storms, particularly the Bodélé Depression and an area covering the confluence of Mauritania, Mali, and Algeria.
Saharan dust storms have increased approximately 10-fold during the half-century since the 1950s, causing topsoil loss in Niger, Chad, northern Nigeria, and Burkina Faso.
Dust storms have also been shown to increase the spread of disease across the globe. Virus spores in the ground are blown into the atmosphere by the storms with the minute particles then acting like urban smog or acid rain.
WORTH 1000 is a Photoshop Contest website. The image shown as ''source'' is a fake.
ReplyDeleteTo confirm this the image shown as ''source'' is an entry called dust-storm by a user called underworth, who took 3rd place for his entry in the Psychic Friends 2 Photoshop Contest.
LINK: http://www.worth1000.com/entries/385445/dust-storm
Fixed. Thank you for your interest Xint.
ReplyDeleteNo one realizes how beautiful it is to travel until he comes home and rests his head on his old, familiar pillow.
ReplyDeleteCheap Flights to Khartoum