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chapter 12
Vocabulary
| Term | Definition |
|---|---|
| weather | short-term variations in atmosphere phenomena that interact and affect the environment and life on Earth. |
| climate | the long-term average of variation in weather fro a particular area. |
| air mass | large volume of air that has the charateristics fo the area over which it forms. |
| source region | area over which an air ass forms. |
| coriolis effect | effect of rotating body that influences the motion of any object or fluid; on earth, air moving north or south from the equatior appears to move right or let, repectively; |
| polar easterlies | global wind systems that lie between latitudes 60 n and 60 s and the poles and is characterized by cold air. |
| prevailing westerlies | globbal wind system that lies between 30 and 60 north and south latitudes where surface air moves toward the poles in an easterly diretion. |
| trade winds | two global wind systems that flow between 30 north and south latitudes, where air sinks, warms and returnes to the equator in a westerly direction. |
| jet stream | narrow wind band that ccurs above large temperature contrasts and can flow as fast as 185 km/h |
| front | boundey between two air masses of differing densisites. |
| thermometer | insturment used to meaure temrature using either the fahereheit or celsius scale. |
| barometer | instrument used to meausre air pressure |
| anemometer | weather intrumetn sued to meausre wind speed |
| hygrometer | weather insturmen used to meausre humidity. |
| radiosonder | ballon borne wather insturment whose sensor meaure, air pressure, humidity, temperature, wind speed, and wind direction for the upper atmosphere. |
| doppler effect | change in the wave frequency that occurs due to the relative motion of the waves moves toward or away fro m an observer. |
| station model | record of weather data for a speccfic place as aspecfic time, using metorgiscal symbols |
| isober | line on a weather map connecting areas of equal pressure |
| isotherm | line on a weather map connectin areas of equal temeprature. |
| digital forecast | weather forecast that uses numerical data to predict how atmopheric variables change over time. |
| analog forecast | weather forecast that compare current weather patterns to patterms that occued in the past |
Created by:
louizatamez
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