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Be able to: Explain where and when monsoons occur.
Identify and define where Jet Streams are.
Mesoscale Sea & Land Breeze
Mesoscale Valley & Mountain Breeze
Macroscale Global Circulation
Non-rotating Earth
Rotating Earth
Idealized Pressure Belts & Prevailing Winds
Seasonal Pressure and Wind Patterns
The greatest seasonal change in Earth’s global circulation is the monsoon .
Monsoon – the seasonal reversal of wind direction associated with large continents, especially Asia. ◦ In winter – the wind blows
from land to sea. ◦ In summer – it blows from sea
to land. Asian Monsoon North American Monsoon
Jet Streams (Polar Jet Stream)
◦ Fast moving horizontal winds high above in the atmosphere. Top of troposphere
◦ These winds help steer storms. ◦ Greater than 50 knots can
exceed 300 mph. 1 Knot = 1.15 mph
location of the strongest surface temperature contrast.
The Jet stream is the strongest during the winter and weakest during the summer.