Meteorology Today, Ahrens Chap 10

Question 1

What is a hadley cell

Answer 1

Single cell model where earth is uniformly covered by water and sun shines directly on the equator. Leads to high pressure at poles and low pressure at equators, which circulate the air

Answer 2

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Question 3

What is the 3 cell model

Answer 3

Generally accepted model used today, where from the equator to the Subtropics is a Hadley Cell(Cold air from Subtropics circulate to the warm air at the tropics), the subtropics to the subpolar areas is a Ferrel Cell(Air from Subtropical Highs blow into the Subpolar low ) and the Subpolar areas to the Poles is a Polar Cell(Polar Highs to Subpolar lows)

Question 4

Is subtropical region high or low pressure

Answer 4

High pressure

Question 5

What is the Intertropical Convergence zone

Answer 5

Where the Northeast Trade Winds Converge with the Southeastern ones. Usually lies near the equator

Question 6

What are the trade winds

Answer 6

Winds caused by the Hadley cell that direct air from the Subtropical highs to the Equatorial low, where it is deflected to the right in the Northern Hemisphere and to the left in the Southern Hemisphere

Question 7

What are the Westerlies

Answer 7

Winds caused by Ferrell cell that direct air from Subtropical highs to Subpolar lows.

Question 8

What is the polar front

Answer 8

Zone of low pressure at Subpolar latitudes

Question 9

What are polar easterlies

Answer 9

Winds caused by Polar cell that direct air from Polar highs to Subpolar lows.

Question 10

What latitudes contain High pressure systems

Answer 10

30 and 90

Question 11

What latitudes contain low pressure systems

Answer 11

0 and 60

Question 12

4 main semi-permenant pressure systems in the Northern Hemisphere

Answer 12

Pacific High, Bermuda High, Icelandic Low and Aleutian Low

Question 13

As you go up in the troposphere, what happens to wind speeds

Answer 13

Increases, because the pressure gradient between the warm air and the cold air increases with height