How do pressure sytems develop?

Question

formation of pressure systems in geography

Answer 1

Sun heats the Earth, warm air rises, cools and sinks.

Low = warm

High = cold

They are constantly changing because nature likes to be balanced so high pressure flows to low pressure.

If you want to learn more, study Meteorology.

Answer 2

The main reason is the unequal heating of the earth's surface(both land and sea)by the solar radiation.

Answer 3

As solar radiation arrives on earth, the equatorial regions receive a greater intensity than the polar regions. So the heat causes the air to rise , producing low pressure system. The hot air rises and moves south and north to cooler regions where it starts to decend, after it descends it moves back to the low pressure as it is drawn there, it is a cycle.  Where as at the poles the air is descending and produces high pressure system. Creating cells known as the Tropical cell, and the Polar Cell. There is another cell between the two called the mid-latitude cell which is caused by the viscosity of air,  so where it meets the equatorial low it will be descending and where it meets the polar high it will be rising. You can find a good diagram on the internet.

These cells will move according to the heating of the earth, etc. The general name given to the Lows and highs, are the Equatorial Trough (low pressure) and the subtropical ridge (high pressure) and the sub polar low.

The polar cell can sometimes be reffered to as the Hadley Cell. and the mid latitude cell can be reffered to as the Ferrel Cell.