Local and Global Weather Patterns
Prepare to learn if you dare.
What is Wind?
Wind is air that is moving. Wind happens when two air masses meet.
Wind is produced by uneven heating of the surface by the sun.
Two factors are used to specify wind: speed and direction.
If the sun warms the Earth's surface, the air around warms to. The movement of air is what makes wind blow.
Wind is the natural movement of the air in the form of a current of air blowing from a particular direction.
What is a sea breeze?
A Sea Breeze is a wind that comes from the Sea. It develops over the coasts and land.
It forms by heating temperature between land and the sea.
Also it creates a pressure minimum over land do to it's comparative warmth.
The sea has a better heat capacity than land.
What is a Land Breeze?
In the daytime, land gets heated by the sun a lot quicker than water. This causes the air to expand.
At night the land cools faster than the sea because of their heat capacity.
A Land Breeze will die when the land warms up again the next morning.
The strength of a Land Breeze if stronger than a Sea Breeze.
What is the Jet Stream?
The jet steam is a fast river of flowing air.
Because of earths rotation it flows west to east in the U.S.
Jet streams are found in the atmosphere high in the air.
The main jet steams on earth is the one that flows from west to east.
However jet streams can stop, split, or they can join together and create one big jet streams.
The strongest jet steams are the polar jets. Polar jets can travel at speeds over 100 miles per hour.
What are Global wind Patterns?
Winds are named after the direction that they blow in.
The globe is encircled by six wind belts, three in each hemisphere.
All six belts move north in the northern summer and move south in the northern winter.
What are prevailing westerlies?
Prevailing Westerlies describe s the winds that blow in a particular area.
The westerlies blow from the west to the east.
Westerlies are the strongest in the winter hemisphere when it's cold and when the pressure is low over the poles.
They are at there weakest in the summer hemisphere and when the pressure is higher over the poles.