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20 Cards in this Set
- Front
- Back
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Precipitation |
Any liquid or solid water particles that fall from the atmosphere and reach the ground. |
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Drizzle |
A type of precipitation in the form of water droplets smaller than typical raindrops. |
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Sleet |
A type of frozen precipitation that does not have a crystal structure |
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Freezing Rain |
A type of precipitation that will melt as it falls through the atmosphere and then refreeze upon contact with objects at the surface |
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Snow |
A type of precipitation in the form of ice crystals |
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Hail |
Frozen precipitation made up of concentric layers of alternating clear and opaque ice. |
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Thermal Velocity |
Constant fall speed in still air reached when the force of gravity equals the opposing force created by the resistance of the air |
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Warm Cloud |
A cloud in which the temperature is above 0 degrees Celsius throughout; such clouds contain water droplets only. |
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Cold Cloud |
A cloud in which the temperature is below 0 degrees Celsius in at least part of the cloud; such clouds contain a mixture of supercooled water droplets and ice crystals. |
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Collision Efficiency |
The probability that two droplets in a cloud will collide. |
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Coalescence Efficiency |
The probability that two colliding cloud droplets will coalesce. |
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Accretion |
A process by which ice crystals grow by cooling with supercooled water droplets that then freeze onto them |
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Aggregation |
A process by which ice crystals grow by colliding with other ice crystals that then stick together |
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Virga |
Water particles that fall from a cloud but do not reach the ground. |
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Graupel
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Lumps of ice that begin as ice crystals but become rounded as supercooled water freezes onto them. |
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Convection Precipitation |
Precipitation that falls from clouds produced by surface heating |
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Orographic Precipitation |
precipitation that falls from clouds produced by air rising along a topographic barrier. |
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Rain-Shadow Desert |
Deserts that form on the leeward sides of mountains. |
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Isohyets |
Lines on a map connecting points of equal precipitation |
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Frontal Precipitation |
Precipitation that falls from clouds produced in frontal systems. |
