high pressure and low pruessure

WEATHER

High Pressure

Winds within high-pressure areas flow outward from the higher pressure areas near their centers towards the lower pressure areas further from their centers. Gravity adds to the forces causing this general movement, because the higher pressure compresses the column of air near the center of the area into greater density – and so greater weight compared to lower pressure, lower density, and lower weight of the air outside the center.

Low Pressure

A low-pressure area, low or depression, is a region where the atmospheric pressure is lower than that of surrounding locations. Low-pressure systems form under areas of wind divergence which occur in upper levels of the troposphere.

weather

Avalanche

Avalanche information

The load on the snow pack may be only due to gravity, in which case failure may result either from weakening in the snow pack or increased load due to precipitation. Avalanches that occur in this way are known as spontaneous avalanches. Avalanches can also be triggered by other loads such as skiers, snowmobiles, animals or explosives. Seismic activity may also trigger failure in the snow pack and avalanches.
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The End

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