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Global Hazards
Atmospheric
GAC
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virat kohli
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Cards (13)
What happens to air at the equator as it warms?
It becomes less
dense
and rises
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What is insolation?
How the
sun’s
rays
hit
the
earth
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Why is the equator hotter than the poles?
Because the
sun's rays
are more concentrated at the equator
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What are the steps of the global atmospheric circulation (GAC)?
Air rises at the equator forming the Hadley cell.
Air sinks at 30° North, creating deserts.
Air sinks at the poles forming the Polar cell.
Air rises at 60° North, leading to temperate grasslands.
Air sinks again at 30° North, forming the Ferrel cell.
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What characterizes the air at the poles?
High pressure
and cold
temperatures
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What do the global atmospheric circulation loops carry?
Warm
rising
air and
cool
sinking air
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What type of weather is associated with low pressure belts?
Unstable weather with
precipitation
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What type of weather is associated with high pressure belts?
Stable conditions with little clouds and
precipitation
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What causes the Coriolis Effect?
The
earth's tilt
on its axis
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What is the primary cause of winds in the atmosphere?
Differences in
pressure
between
high- and low-pressure
belts
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What creates a pressure gradient in the atmosphere?
The difference in pressure between
rising
and
sinking
air
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What is the effect of a greater pressure gradient on winds?
The winds become stronger
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Where is the UK located in relation to the global atmospheric circulation cells?
In the
Ferrel cell
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