This world contains geographical systems, which take place every second, and the tri-cell model is a key one. It contains three cells the; Polar, Ferrell and Hadley which combine as the atmospheric circulation. All these cells affect our climate this is the average weather over a 30-year-period. Now using these terms, this essay will contain information relating to them.
Climate variations around the plant do mostly occur due to latitude and the tri-cell model. A large amount of the variations takes place when the ITCZ (inter-tropical convergence zone) is overhead the equator. The Hadley cell is the most distinctive out of the three cells. As when it is at the equator the sun heats the ground, causing the air to rise and create low-pressure zones on this area of the earths surface. Now this is were the ITCZ is formed, when the low pressure has the warm air cools and thickness into storm clouds. Circulation occurs as the ITCZ separates heading towards the poles – as this process continues it starts to sink towards the ground due to a reduction in the size of the atmosphere, creating the subtropical high-pressure zone. Normally as the air sinks trade winds are created towards the equator as the cooler air becomes warmer and fewer clouds remain. As an example the UK’s weather is very much determined by the Ferrell Cell, which is the weakest of the three cells. But it still has an affect on the circulation round the plant. It is largely driven by convergence and divergence of the air associated by the other cells. The Ferrell cell does not have as much of an affect on the circulation, but surface winds allow it to transfer air from the equator to the poles. Whereas the Polar cell has a large affect on the circulation of the earths air and winds. This cell is fairly narrow (from the earth’s surface to the