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18 Cards in this Set
- Front
- Back
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Hydrosphere
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water in the earth-atmosphere system
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Humidity
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The amount of water vapor in the air
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Relative Humidity
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the amount of water vapor in the air relative to the amount at saturation
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Dew Point
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the temperature the air must reach for the air to become saturated.
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Adiabatic Process
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The process by which changes in air temperature occur solely as a result of changes in atmospheric pressure
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Dry Adiabatic Lapse Rate
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When air is heated or cooled adiabatically and no condensation occurs, air temperature will follow this
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Lifting Condensation Level
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when rising air cools to a dew point temperature and moisture condenses from the air
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Wet Adiabatic Lapse Rate
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between 4 and 9 degrees C per km, 6
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Rainshadow Effect
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Precipitation occurs on the windward side of a mountain
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Chinook winds
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Downslope winds that can be warm and dry
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Air Mass
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large body of air with fairly uniform temperatures and moisture characteristics
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Front
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boundary between air masses having different thermal and/or moisture characteristics
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Cold Front
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when cold air overtakes warm air at the surface
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Warm Front
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when warm air overtakes cold air at the surface
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Stationary Front
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a front between warm air and cold air where there is no movement
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Occluded Front
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a front that arises when a cold front overtakes a warm front
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Dry Line
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a frotn between warm, moist air and warm, dry air
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Easterly Wave
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disturbances in isobars that form an equatorial trough
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