Physical Geography, Test 2

Gas, Liquid, solid

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 16.0px Times} Pressure caused by the weight of the atmosphere. At sea level it has a mean value of one atmosphere but reduces with increasing altitude.

p.p1 {margin: 0.0px 0.0px 12.0px 0.0px; font: 12.0px Verdana; color: #333233} layer in the atmosphere in which temperature increases with altitude.

Standard pressure is 29.92” Standard barometric pressure is also 1013.2 mb (milibars)

I. Along equator there is low pressure II. Along 30’s there is high pressure III. Along 60’s there is low pressure IV. Along 90’s there is high pressureThese pressure belts provide worldwide prevailing winds

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1. a. Pressure gradient force: When high pressure on the wave chart rolls down to the low areas
2. b. Coriolis force: Has pressure curving to the right (clockwise). instead of just slipping down the pressure cell to lowness it will sometimes curve around
3. -It spirals obliquely until it gets to the bottom of the “hill”
1. -When it gets to the plane it switches and spirals counter clockwise
1. -Think of when the water drains down the toilet
4. c. Friction force: Air roles up against earth and moves even more downhill
1. -Ascending air brings bad weather
2. -Descending air brings good weather

Pressure gradient force: When high pressure on the wave chart rolls down to the low areas

1. Coriolis force: Has pressure curving to the right (clockwise). instead of just slipping down the pressure cell to lowness it will sometimes curve around
2. -It spirals obliquely until it gets to the bottom of the “hill”
1. -When it gets to the plane it switches and spirals counter clockwise
1. -Think of when the water drains down the toilet

1. Friction force: Air roles up against earth and moves even more downhill
1. -Ascending air brings bad weather
2. -Descending air brings good weather

There are three main dominant belts on the planet: p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica} 1. doldrums: At the center of the earth, when high pressure comes north an south and meets low pressure on the equator. -It creates a belt of variable winds and calms. 2. Right above the doldrums is called the northeast trade winds. 3. Just south of the Doldrums is the southeast trade winds.

Located north, 30 degrees, the sub tropical belt of winds and calms. - Same 30 degrees south.

The westerlies (included for the southern belt.

The pressure in the most northern are weakest. It does manage to come from the east. (Clockwise) -in the south it is just the same, but counterclockwise.

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1. 1. Air always moves from a high to a low.
2. 2. in the Northern Hemisphere air is going to go clockwise around a HIgh and counter-clockwise around a low.
3. 3. In the southern hemisphere air is going to move counterclockwise around a high and clockwise around a low.
4. 4. Air is going to rise out of a low and vertically falls into a high

An instrument that tells what the wind is like 365 days a year.-Gives a historical perspective