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Chapter 12 Notes

TermDefinition
Weather Short-term variations in atmospheric phenomena that interact and affect the enviroment and life on Earth
Climate The long-term average of variations in weather for a particualr area.
Air Mass A larfe volume of air that has the same characteristics, such as humidity and temperature, as its source reegion forms.
Source Region The area over which the air mass forms.
Coriolis Effect The directions of Earth's winds are influenced by Earth's rotation
Polar Easterlies The wind zones between 60 N latitude anf the north pole, and 60 S latitude and the south pole
Prevailing Westerlies The wind systems on Earth located between latitude 30 N and 60 N, and 30 S and 60 S
Trade Winds Two circulation belts of wind found between latitudes 30 N and 30 S
Jet stream A narrow band of fast wind
Front A narrow region between two air masses of different densities
thermometer measures temperature using either Fahrenheit or Celsius scale
barometer measures air pressure
anemometer measures wind speed
hygrometer measures humidity
radiosonde used for gathering upper-atmospheric data
Doppler Effect change in pitch or frequency that occurs due to the relative motion of a wave
station model a record of weather data for a particular site at a particular time
isobar lines on a weather map connecting areas of equal pressure
isotherm lines on a weather map connecting areas of equal temperature
digital forecast weather forecast that uses numerical data to predict how atmospheric varibles change over time
analog forecast weather forecast that compares current weather patterns to patterns that occured in the past
Created by: spjaco
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