Environmental Sciences Flashcards
How is pressure calculated?
force/area
What is pressure measured in?
Pascals(PA)
PSI
Pounds per sq in
Wind blows…
high to low
Colder air = what pressure?
High
Warmer air = what pressure?
Lower
Pressure decreases with what?
Altitude
Air pressure is measured in what?
millibars and inches of mercury
What is HG
Inches of mercury
Isobars
Lines connecting points of equal air pressure
Typical High Pressure System
Cold, stormy, strong winds, moist air
Typical Low Pressure System
Sunny, calm winds, cool, dry air
Av. Low pressure system HG
28.9
Av. High Pressure HG
30.5
Air Mass
Large body of air with the same temperature and moisture(humidity)
Where do cold masses tend to come from?
N, NW, W
Where do warm air masses tend to come from?
S, SE, E
Maritime Polar
Wet, cold, forms over cold water, brings that with it
Maritime Tropical
Warm, wet, forms over warm water, brings that with it
Continental Polar
Dry, Cold, forms over cold, dry land, brings that weather with it
Continental Tropical
Dry, warm, forms over dry, warm, land, brings that weather with it
Front
when air masses collide
Cold front
When a cold air mass pushes up a warm air mass
Warm front
When warm air mass stretches over cold air mass
