Sandstorm

sandstorm on the Atlantic

sandstorm in the North African-Arab area

sandstorm in aluminium Asad, Iraq

a sand or a Staubsturm is a storm or a strong wind, the sand or dust with itself leads. It particularly occurs in deserts . A sandstorm must of sand trousers, which remains normally spatially more closely limited, are differentiated.

With a sandstorm it concerns a very dry and hot wind, which whirls up and afterwards carries first large quantities sand in dry regions highly. Some storms transport sand up to 100 million tons over toPart very large distances. The distance, which the sand puts back here, depends on the size of the individual sand particles. The largest particles form slow dunes in wind-protected places. It becomes estimated that in the year 2004 altogether by sandstorms sand moves about 2-3 billion tonsbecame.

Thus for example African desert sand, which sets off in the Karibik, is made responsible for the there Korallensterben. On the other hand seeing era sets - sand off also in areas of Europe and works against by its alkaline characteristics the acid rain . In the South American rain forest the same desert sand serves as Fertilizer.

The sand from the Australian desert partly moves over Brisbane. This sand contains desert regions also bacteria of the Q-fever of the breed animals from eliminations in the rural steppes - and. Thus it provides here not only for smog, but also for thatRise of the illnesses. As soon as it exceeds however the coastal lines, the consequences of the desert storm change. In the nutrient-poor south Pacific is the sand responsible for an increasing tenfold of alga growth and improved thereby the bases of life of sea mammals and fish.

Sand, those of drying pleased surfacesthe Aral Sea to be blown, are loaded with Pestiziden from the cultivation of cotton and provide in such a way for appropriate loads in the sedimentation areas.

The frequency and strength of sandstorms increased tenfold in the last 50 years.

An important cause for this development is the increasing useof jeeps in the deserts. Thin hardened crusts on the desert surfaces are broken open by the jeeps, and thus the erosion protection for the sand which is under it destroys. To the same effect the introduction of cattle and sheep to the interior of Australia led. The hooves destroyed thosethin vegetation layer.

Further reasons are the increasing Desertifikation, deforestation, and the climatic change.

In many areas, in which regularly sandstorms arise, they receive local designations:

Buran in quilting - and desert area in Central Asia,
Chamsin or also Khamsin in the Nile area and in Israel/Palestine,
Ghibli or Gibli in the area Tunesien and Libya,
Samum in the North African-Arab area.
Scirocco

[work on]

coding

in the Synoptik uses one the following symbols and codes defined by the World Meteorological Organization for the space-saving indication of a weather condition with a sandor Staubsturm. The symbols are registered thereby as part of the data of a Wetterstation into a soil weather chart. The assigned number key applies both to the Synop code and to the METAR.

Symbol	number key	description
	09	sand or Staubsturm to the observation time in range of vision or during the latterHour at the Wetterstation
	of 30	lighters or moderate sand and/or. Staubsturm, become during the last hour weaker
	31	lighters or moderate sand and/or. Staubsturm, during the last hour of invariably
	32	lighters or moderate sand and/or. Staubsturm, become during the last hour stronger
	33	strong sandand/or. Staubsturm, become during the last hour weaker
	34	strong ones or moderate sand and/or. Staubsturm, during the last hour of invariably
	35	strong ones or moderate sand and/or. Staubsturm, become during the last hour stronger
	98	thunderstorms with dust or sandstorm the observation time