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gcse geography aqa weather and climate

can someone explain simply to me how and why a depression occurs and steps involved. can you write it in steps/bullet points please thank you!! :smile:

Reply 1

Nirgilis

Moved to the Geography forum for you :smile:

. You should get more help here :yep:

Reply 2

econam

A depression occurs when warmer air meets cooler air, and rises gradually over it.

As the warm air slowly rises it will cool and its water content condenses to from clouds. This will cause steady rain, later giving way to drizzle and finally clearer skies.

Behind the warm front is an area of warm rising air and low pressure - this is called the centre low-pressure system. As this part of the depression passes over there could be a short spell of dry clear weather. However, at the trailing cold front, heavier, cooler air meets the warm air at the centre of the depression, undercutting it and forcing it steeply upwards. Quickly moving air masses produce high winds and cooler temperatures.

As the rapidly rising warm air cools, its water content will condense and clouds will form. The result is heavy rain or thunderstorms, giving way to showers and finally to clear skies as the cold front moves away.

Hope that helped :smile: