Monsoons
MonsoonsMonsoons are
seasonal winds.
The word monsoon comes from the Arabic word for season.
There are wet and dry monsoons.
The Wet MonsoonThe wet monsoon
arrives in late May or early June.
South Asia relies on the wet monsoon for most of its annual rainfall.
Flooding often occurs in September at the end of the monsoon season.
The Dry Monsoon
The dry monsoon arrives in October and lasts though November.
Atmospheric PressureHigh Pressure- heavier, drier air
Low Pressure- lighter, moister air
As air rises, it cools, the humidity condenses, and it rains
Pressure Gradient ForcesAir masses flow from high pressure to low pressure
Coriolis Effect
Air masses are deflected due to earth’s rotation
Differential HeatingAir masses over land heat and cool faster than
air masses over water
Winds 1. Winds are described by the direction from
which they blow
2. Sea breeze- summer day at the beach
3. Land Breeze- summer night at the beach
Summer Day at the Beach
Summer Night at the Beach
Wet Monsoon
Dry Monsoon