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What causes climatic differences around the Tropics and what impact does this have on people and the environment?

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Introduction

What causes climatic differences around the Tropics and what impact does this have on people and the environment? The Hadley Cell as shown below demonstrates how the three different climate types around the tropics are created from the high and low pressure in the area. On either side of the equator the pressure is low and the air is rising due to the heat. This causes humid conditions with a lot of rain (Clouds can always be seen from the satellite map) and very high temperatures due to the proximity to the Sun. These are the best conditions for tree and plant life to grow and this is why rainforests are abundant in this area. ...read more.

Middle

The Hadley cell in Africa can be shown by the locations of the rainforests, Savannah grasslands and the Desert from the bands f types of vegetation. This pattern is apparent both south and North of the equator. These different and extreme climates require both the vegetation and people to adapt to these harsh conditions. Tribes living in Savannas hunt large animals such as the buffalo due to the high amount of body mass that they possess. The Buffalo itself is a grazing animal and it has adapted to these conditions by knowing what plants to graze in the dry season to obtain the most water. Plants and trees in the Savannah are fire and drought resistant due to the fact that the Baobab Tree has a very thick trunk that can hold and efficiently store large quantities of water and not many branches. ...read more.

Conclusion

This allows the same piece of land to be used because when the farmers return in a few years time the land will have regenerated. In rainforests tribes people experience a rainy and dry season. In the rainy season large amounts of floods occur so in the Amazon people have built houses up on stilts or have floating houses, which are held down by anchors to prevent their housing from being destroyed. They also use a method of farming called shifting cultivation where they clear an area for farming, farm it and then leave so that it may regenerate. This method is useful so long as the area cut down is too large and isn't farmed for too long. ...read more.

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