Mountain and Valley winds
Mountain-valley
breezes are formed by the daily difference of the thermo effects
between peaks and valleys. In daytime, the mountain side is directly
heated by the sun, the temperature is higher, air expands, air pressure
reduces, and therefore air will rise up the mountain side from the
valley and generate a valley breeze. The valley breeze reaches its
maximum force at around 2 p.m. After this time, the breeze decreases in
power and come to a complete stop by sunset. By nightfall, the mountain
side region is able to dissipate heat more quickly, due to its higher
altitude and therefore temperature drops rapidly. Cold air will then
travel down the mountain side from the top and flow into the valley,
forming a mountain breeze.
Local Winds :These local winds blow in the various region of the world.
Hot Winds
- Sirocco - Sahara Desert
- Leveche -Spain
- Khamsin -Egypt
- Harmattan -Sahara Desert
- Santa Ana - USA
- Zonda - Argentina
- Brick fielder -Australia
Cold Winds
- Mistral - Spain and France
- Bora - Adriatic coast
- Pampero - Argentina
- Buran - Siberia
Descending Winds
- Chinook - USA
- Fohn - Switzerland
- Berg - Germany
- Norwester - New Zealand
- Samun - Persia (Iran)
- Nevados - Ecuador