Class 18 (starting at Slide 15)(and some 17 and 19)

air pressure

http://www.youtube.com/watch?v=vGulvutZJpg

What is wind?

What influences wind direction? What influences wind speed?

Let’s figure out step-by-step, what happens to a rising air parcel.

33%

33%

33% 1. Will rise2. Will sink3. Will maintain its vertical position

50%

50% 1. Be subject to lessening air pressure2. Be subject to increased air pressure

33%

33%

33% 1. Expand in volume2. Contract in volume3. Stay the same size

50%

50% 1. Collide with each other more2. Collide with each other less

50%

50% 1. Speed up2. Slow down

50%

50% 1. Less kinetic energy, lower temperature

2. More kinetic energy, higher temperature

50%

50% 1. Water vapor will condense2. Water will evaporate

50%

50% 1. Clouds and precipitation2. Clear skies and dry conditions

50%

50% 1. Low pressure system2. High pressure system

25%

25%

25%

25% 1. It is called a vortex low2. It is a tornado3. It is called a cyclone4. It is called an anticyclone

25%

25%

25%

25% 1. Converge and move counterclockwise

2. Converge and move clockwise3. Diverge and move counterclockwise4. Diverge and move clockwise

http://www.atmo.arizona.edu/products/wximagery/globalwv.html

http://www.cpc.noaa.gov/products/global_precip/html/wpage.gl_ir_loop.html

Monsoon Patterns