Online Quiz
Wind : Mesoscale
Part1: Scales of Atmospheric Motion
Eddy
Whirl of air, Come in different sizes
Small volume of air behaves differently from the large flow in which it resides
Eddies are down wind from the obstacle
Caused by encountering an obstacle
small eddies & little vertical Mixing
In unstable air wind produce
large eddies & high vertical Mixing that produce strong & gusty surface wind
Part2: Mesoscale
Local Winds (Mesoscale)
Caused by topographic effects or variations in local surface composition
Include
1. Land & Sea Breezes
2. Valley & Mountain Breezes
3. Chinook Winds (Foehn Winds)
4. Katabatic Winds (Fall Winds)
5. Santa Ana Winds
6. Haboobs Winds (Desert Winds)
7. Dust Devils
8. Country Breezes
Associated with large urban areas that are warmer than the rural (country)
City is warmer (urban heat island effect)
The wind is light & blows from rural areas toward the cities
See most often on clear, calm nights
Part3 : MONSOON
MONSOON
Seasonal change in global circulation
Refers to Seasonal reversal of wind direction
Caused by Alternation between 2 weather patters
Doesn’t mean rainy season
Winds blow off the continents (dry air)
Summer Monsoon
Wind move from the sea to land (moist air)
The End
Environmental and applied geology 