Questions and Answers
Which atmospheric circulation cell is characterized by a lack of winds?
In the Northern Hemisphere, the winds associated with a high-pressure system blow in which direction?
Who invented the mercurial barometer?
What is the name of the phenomenon where ocean currents along the equatorial Pacific Ocean reverse, leading to global economic impacts?
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What is the ultimate energy source for most wind?
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Which instrument is used to measure air pressure?
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In the Northern Hemisphere, the winds associated with a low-pressure system blow in which direction?
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What is the force exerted by the weight of the air above called?
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What is the standard sea level pressure in millibars?
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What type of breeze is formed when cooler air over water flows toward warmer land?
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When is a sea breeze likely to originate?
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What is the zone of subsiding dry air that encircles the globe near 30° latitude?
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Which of the following is NOT a factor in controlling wind?
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What is the term for lines on a weather map connecting places of equal air pressure?
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In the Southern Hemisphere, winds associated with a low-pressure system blow:
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What is the most common instrument used to determine wind direction?
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Fast-moving currents of air found near the top of the troposphere are called:
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Most of the United States is situated in which zone of prevailing winds?
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Study Notes
Atmospheric Circulation Cells
- Hadley cell, Ferrel cell, and Polar cell are atmospheric circulation cells.
- The Doldrums are not an atmospheric circulation cell.
Wind Patterns
- In the Northern Hemisphere, winds associated with a low-pressure system blow counterclockwise toward the center.
- In the Northern Hemisphere, winds associated with a high-pressure system blow clockwise toward the center.
- In the Southern Hemisphere, winds associated with a low-pressure system blow clockwise toward the center.
Measuring Air Pressure
- The mercurial barometer was invented by Torricelli.
- Mercurial barometer, aneroid, and barograph are instruments used to measure air pressure.
- Anemometer is not used to measure air pressure, but to measure wind speed and direction.
El Niño
- El Niño refers to episodes of ocean warming due to a reversal of ocean currents along the equatorial Pacific Ocean.
Energy Source for Wind
- Solar radiation is the ultimate energy source for most wind.
Air Pressure
- The force exerted by the weight of the air above is called air pressure.
- Standard sea level pressure in millibars is 1013.
Land and Sea Breeze
- A sea breeze is the result of cooler air over the water (high pressure) flowing toward the warmer land (low pressure).
- A sea breeze usually originates during the day and flows toward the land.
Weather Forecasting
- If "fair" weather is approaching, the pressure tendency would probably be rising.
- If "stormy" weather is approaching, the pressure tendency would probably be falling.
Factors Controlling Wind
- The Coriolis effect, pressure-gradient force, and friction are factors that control wind.
- Ocean current circulation is not a direct factor in controlling wind.
Global Wind Patterns
- The trade winds are dependable surface winds of the Earth centered about 15° north and south latitudes.
- The zone of subsiding dry air which encircles the globe near 30° latitude, north and south, is known as the subtropical high.
- The Intertropical Convergence Zone (ITCZ) is the equatorial low where surface winds of two Hadley cells converge.
Isobars
- Lines on a weather map connecting places of equal air pressure are called isobars.
Jet Streams
- Fast moving currents of air found near the top of the troposphere are called jet streams.
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Description
Test your knowledge on atmospheric circulation cells and wind patterns in low-pressure systems. Questions cover Hadley cells, Ferrel cells, and more.
