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×Low pressure
Low pressure
The meandering of the westerlies causes small
circle of air and it turns into a low pressure.
»»»see the picture on the right»»»
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An extra tropical cyclone progresses by the
difference of temperature of the northern
cold and southern warm air. A front occurs
on the boundary line of the cold and warmth.
And it makes rain in the large area. You
can see all kind of cloud around the lowpressure.
»»»see the picture on the right»»»
»
click the cloud to see more information about
it
The lowpressure have upward air current.
This is the reason lowpressure makes many
clouds and weather go bad.
»»»see the picture on the right»»»
»
 
There are lots of humid(red color) around
the lowpressure.
Family of low pressure
Extra tropical cyclone
It is the low pressure generated on the latitude
belt in extra tropical cyclone (extra-tropical
cyclone) ., and being accompanied by the
front is the feature.
Tropical cyclone»
Tropical cyclones are one kind of the low-pressures
which come from the Equator with heavy storm.
The tropical cyclone in North Pacific western
part (it is the western side from a the date
line) is called Typhoon. In the West North
Pacific eastern part is called Hurricane.
In the Bay of Bengal, and the Arabian Sea
and south in Africa is called Cyclone. In
Austria it is called Hurricane.
Heat low
When the grand is heated by the Sun in the
midland. The air which is near the grand
is also heated. The hot air rises the upward air current». And the clouds are generated.
Local Heavy Rainfall
This is one kind of the Heat low, but this
is caused not by the sunshine but by the
people who use much energy.
The heat of the city makes upward air current
over the city reached to 1,000,00m high.
The air is cooled off in the upper sky and
high Cumulonimbus» is generated. The city got a local heavy
rainfall. This happens more often through
the Urban heat island.
The Circle cloud in Tokyo Japan.
The Circle cloud are made by exhausted gas
and heat of cars over the loop-line.
Polar low
This is the small low pressure generated
near a Pole. |
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:::::Weather:::::
Media bar
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Meandering westerlies and lowpressure
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Situation of clouds and lowpressure
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Air current of lowpressure
»»»Link»»»
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You can find more information about urban
heat island at NASA.
×Where does the weather come?
×Low pressure
×Front
×Tropical Cyclone
×Highpressure
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Cloud and Weather