Plz answer this question for 5 marks -- Difference between mountain wind and valley winds?
Answers
Answer:
The most basic differences are the time of day, and direction of the breezes. During day time, the heat coming off the mountain will heat air higher up in the atmosphere at a faster rate then the ground (in the valley) can. Warm air expands, which creates a small low pressure system at or near the mountain top. In turn, this draws in air from the valley, thus creating a breeze that blows up from the valley to the top of the mountain. The updraft pattern is called valley breeze.
At night, the sheer mountain slopes cool down air faster than the existing air in the atmopshere. This creates a localized high pressure system, as the air becomes more dense and packed in. That high pressure makes winds blow down the mountain into the valley. This downdraft pattern is called mountain breeze.
To summarize-- Valley Breeze: daytime winds blowing from the valley up to the mountains. Mountain Breeze: nighttime winds that go from the mountains down to the valley.