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 Re: الهبوب (الكتاحة) أصبحت كلمة إنجليزية Haboob و السبب بكري أبو بكر (Re: Kostawi)
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Haboob
From Wikipedia, the free encyclopedia
It has been suggested that this article or section be merged into Dust storm . (Discuss) Proposed since July 2011.
Haboob moving across the Llano Estacado toward Yellow House Canyon near the residential community of Ransom Canyon, Texas (18 June 2009)
A haboob (Arabic هبوب) is a type of intense sandstorm commonly observed in arid regions throughout the world. They have been observed in the Sahara desert (typically Sudan), as well as across the Arabian Peninsula, throughout Kuwait, and in the most arid regions of Iraq.[1] African haboobs result from the northward summer shift of the inter-tropical front into North Africa, bringing moisture from the Gulf of Guinea. Haboob winds in the Arabian Peninsula, Iraq and Kuwait are frequently created by the collapse of a thunderstorm. The arid and semiarid regions of North America – in fact any dryland region – may experience haboobs. In the USA, they are frequently observed in the deserts of Arizona, including Yuma and Phoenix[2][3], as well as New Mexico and Texas [4]. During thunderstorm formation, winds move in a direction opposite to the storm's travel, and they will move from all directions into the thunderstorm. When the storm collapses and begins to release precipitation, wind directions reverse, gusting outward from the storm and generally gusting the strongest in the direction of the storm's travel.[5][6][7]
When this downdraft, or "downburst", reaches the ground, dry, loose sand from the desert settings is essentially blown up, creating a wall of sediment preceding the storm cloud. This wall of sand can be up to 100 km (60 miles) wide and several kilometers in elevation. At their strongest, haboob winds can travel at 35-50 km/h (20-30 mph), and they may approach with little to no warning. Often rain is not seen at the ground level as it evaporates in the hot, dry air (a phenomenon known as virga), though on occasion when the rain does persist, the precipitation can contain a considerable quantity of dust (severe cases called "mud storms"). Eye and respiratory system protection are advisable for anyone who must be outside during a haboob -- moving to a place of shelter is highly desirable during a strong event.
Across North Africa and the Near East, there are many regional names for this unique sandstorm. The word haboob comes from the Arabic word هبوب "strong wind or 'phenomenon'."
Dust Bowl era haboob approaching Spearman, Texas, on 14 April 1935.
Haboob blowing into Ahwatukee, Phoenix, Arizona, on 22 August 2003.
A massive haboob is close to enveloping Al Asad Airbase, Iraq, just before nightfall on 27 April 2005.
A Haboob approaching Taji, Iraq, in 2006.
A haboob hits the South-East Valley, Gilbert, AZ, USA, on 5th July, 2011, around 7 p.m., hiding San Tan Mountain completely.
[edit]See also
Wikimedia Commons has media related to: Haboobs
Bora (wind)
Dust devil
Dust storm
Intertropical Convergence Zone
Khamsin
Mistral (wind)
Sand storm
Simoom
Sirocco
Outflow boundary
[edit]References
^ Sutton, L.J. 1925. Haboobs. Quarterly Journal of the Royal Meteorological Society 51:25-25.
^ Idso, S.B., Ingram, R.S. and Pritchard, J.M. 1972. An American haboob. Bulletin of the American Meteorological Society 53(10):930-955.
^ Idso, S.B. 1973. Haboobs in Arizona. Weather 28(4):154-155.
^ Chen, W., and Fryrear, D.W. 2002. Sedimentary characteristics of a haboob dust storm. Atmospheric Research 61(1):75–85.
^ Farquharson, J.S. 1937. Haboobs and instability in the Sudan. Quarterly Journal of the Royal Meteorological Society 63(271):393-414.
^ Lawson, T.J. 1971. Haboob structure at Khartoum. Weather 26(3):105-112.
^ Membery, D.A. 1985. A gravity-wave haboob? Weather 40(7):214-221.
[edit]External links
Haboobs, Arizona Department of Transportation.
The Bibliography of Aeolian Research
Haboob on Winds of the World
Short Video of July 2011 Arizona Haboob (Flash Video software or a web browser supporting H.264/MPEG-4 AVC is necessary to see the content)
Categories: Storm | Weather hazards
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