The Dust Storms
“THE DUST STORMS”
Dr.Taghreed Ali
Atmospheric Science department
Collage of science
Al-Mustansiriyah University
What do you already know?
•
What is “The dust”?
•
What is the storm?
What is DUST?
Dust is earth , pollen or
any other matter in finely
powdered particles that
can be blown in the air
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A dust storm is a meteorological
phenomenon when dust is
raised from the ground by
strong winds.
Its common on the great plains
of Arabia, North America, in the
Gobi desert of Mangolia, the
Taklamakan Desert of
Northwest China, the Sahara
desert of North Africa, and other
arid and semi arid regions of the
world.
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The dust storm definition
Generally, “a dust storm is defined to be a
windstorm that sweeps clouds of dust across
an extensive area.” or “A windstorm that lifts up
clouds of dust or sand especially in an
arid region”.
For meteorological purposes, however, such
a windstorm can only be reported as a dust
storm if wind speed becomes 22 knots (40.7km)
or more and surface visibility reduces to less
than one kilometer. For reporting of a dust
storm both of these conditions are to be
satisfied. If any one or both of the
conditions are not satisfied, than the
phenomenon may not be reported as a dust
storm. In that case, it may be reported as
blowing/drifting dust or sand / dust in
suspension and etc. depending upon the
prevailing weather conditions. Front of a
dust storm especially in case of a severe
storm may appear like a ‘wall of dust’
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Temperature
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Soil
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Wind
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The weather situations in favor of forming strong
wind or severe wind, the source
distribution of sand & dust and air unsteadiness
condition are the major reasons of
forming dust storms or strong dust storms.
Severe wind is the dynamical force of a dust
storm, while the source of sand and dust is the
substance foundation of a dust storm.
Unsteady thermal conditions benefit to enhance
wind power level and advance the
convection developing, which carry more dust
and sand and blow them higher.
Effect of the dust storm
What to do in case of dust storm
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Cover mouth and nose
If driving reduce speed or pull over
Lock all open areas in the house
Stay indoors
What can we do?
Here a few of the steps we can do to stop the dust storms :
•
Plant some trees
•
Invest in the deserts
•
check your air conditioner
•
build more buildings
Dive into the world of dust storms with Dr. Taghreed Ali from Al-Mustansiriyah University. Understand the origins, impact, and formation of these meteorological phenomena, with insights on factors, causes, and effects. Explore the significance of dust storms in atmospheric science.
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Presentation Transcript
THE DUST STORMS Dr.Taghreed Ali Atmospheric Science department Collage of science Al-Mustansiriyah University
What do you already know? What is The dust ? What is the storm?
What is DUST? Dust is earth , pollen or any other matter in finely powdered particles that can be blown in the air
the dust storm A dust storm is a meteorological phenomenon when dust is raised from the ground by strong winds. Its common on the great plains of Arabia, North America, in the Gobi desert of Mangolia, the Taklamakan Desert of Northwest China, the Sahara desert of North Africa, and other arid and semi arid regions of the world. N O I T A T N E S E R P
The dust storm definition Generally, a dust storm is defined to be a windstorm that sweeps clouds of dust across an extensive area. or A windstorm that lifts up clouds of dust or sand especially in an arid region . For meteorological purposes, however, such a windstorm can only be reported as a dust storm if wind speed becomes 22 knots (40.7km) or more and surface visibility reduces to less than one kilometer. For reporting of a dust storm both of these conditions are to be satisfied. If any one or both of the conditions are not satisfied, than the phenomenon may not be reported as a dust storm. In that case, it may be reported as blowing/drifting dust or sand / dust in suspension and etc. depending upon the prevailing weather conditions. Front of a dust storm especially in case of a severe storm may appear like a wall of dust
Factors o Temperature o Soil o Wind
The cause of formation The weather situations in favor of forming strong wind or severe wind, the source distribution of sand & dust and air unsteadiness condition are the major reasons of forming dust storms or strong dust storms. Severe wind is the dynamical force of a dust storm, while the source of sand and dust is the substance foundation of a dust storm. Unsteady thermal conditions benefit to enhance wind power level and advance the convection developing, which carry more dust and sand and blow them higher.
Effect of the dust storm Reduce visibility Erosion Climate change Soil Composition Health: oAllergies oIntoxication oDry skin oBreathing problems
What to do in case of dust storm Stay indoors 01 02 Cover mouth and nose 03 If driving reduce speed or pull over 04 Lock all open areas in the house
What can we do? Here a few of the steps we can do to stop the dust storms : Plant some trees Invest in the deserts check your air conditioner build more buildings
THANK YOU Any Questions?
