IS2104: Atmosphere and Hydrosphere


Global wind patterns March 29, 2010

Filed under: Uncategorized — 09ip01 @ 4:22 pm

In the lesson on Global wind patterns, we learn how winds of the earth are formed and how they travel from place to place.

The area on earth that receives the strongest and most sunlight is at the equator and thus it can be concluded that these area receive the most heat. The air at the equator gets heated up and rises, creating space for cold air to rush into this empty space to fill it up. The hot air travels to wards the tropic of Cancer or Capricorn where is loses its head and descends. This forms the Hadley Cell.

The poles are areas on the earth that receives the least heat from the sun, and thus the air in that area is cold and sinks. this cold air travels away from the poles until it reaches the arctic or antarctic circle where the air gets heated up and rises and travels back to the poles. This is known as the polar cell.

The Cell in between the arctic or antarctic circle and the tropic of Cancer or Capricorn is know as the Ferrel cell. The Ferrel cell is an induced cell. this cell is induced by the Hadley and Polar cell. On the tropic of Cancer or Capricorn, this is where the air of the Hadley cell is descending. Thus the air of the Ferrel cell follows along with it. On the Arctic or Antarctic circle where the air of the polar cell is ascending, The air of the Ferrel cell ascends along with it.

An image of what we learnt can be found on this website because i don’t how to attach pictures