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Define Wind:
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Describe a Vector measurement, or field.
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Topic 7:Weather C

Pages (131-135); Wind & Global Circulation Patterns

QuestionAnswer
Define Wind: The horizontal movement of air across Earth's surface.
Describe a Vector measurement, or field. It is a measurement with both magnitude and direction.
Define a pressure gradient. Gradient = Change in air pressure / Change in distance
What determines wind velocity? The magnitude of the pressure gradient. Large gradient = fast wind. Small gradient = slow wind.
An anemometer measures what? Wind velocity.
How do winds blow? From "high to low" (wind pressure).
Explain the Coriolis Effect. Winds appear to curve towards the west due to Earth's rotation. The effect causes the winds to curve ever clockwise in the Northern hemisphere.
How are winds named? From whence they came! From, not to!!
If isobars are close together, does the wind blow fast or slow? Fast.
Describe the effect of wind upon the surface of the water. The friction creates surface currents, & waves; and the wind direction determines where the ocean currents are pushed.
Why is the atmosphere in constant motion? Due to differences in air temperature and pressure through out the troposphere.
Name the primary source of different air pressures on Earth. Unequal heating of Earth's surface.
How many major convection cells exist on Earth? Six (6)!
Can you name the prevailing winds in each of the six cells? **See figure 7-8. 30 degrees North to 60 degrees North, is a South West wind.
Describe the jet stream. Fast moving, narrow bands of air found near the top of the troposphere.
How much precipitation falls at the Equator, and each 30 degrees North and South all the way to the Poles? Equator is Wet, 30 degrees N or S - dry, 60 degrees N or S - wet, 90 degrees N or S = dry.
Describe the dry regions of the world in terms of convecting air. Cold and Dry.
Describe the wet regions of the world in terms of convecting air. Warm and moist.
Are the zones of convergence wet or dry latitudes?(Ground level) Wet. Can you explain why?
Are zones of divergence wet or dry latitudes?(Ground level) Dry. Can you explain why?
Explain planetary wind belts. Prevailing winds that move in a predictable direction most of the time. This aids meteorologists in weather prediction!
Depict Monsoons. Seasonal winds over South East Asia. (See figure 7-9). Onshore brings rain, off shore yields the dry season.
Name the prevailing winds effecting the United States. South Westerlies; Air parcels move from west to east, or California towards New York.
Can you answer the multiple choice questions found on pages 135 & 136? Answer questions (25 - 35). If some terms or concepts remain unclear, please clarify with your instructor or a classmate.
Created by: whearn
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