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Exam 3
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24
Geology
Undergraduate 1
03/22/2015

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Term
Adiabatic Process
Definition
One that occurs without the transfer of Heat or matter
Term
Adiabatic Temperature changes by:
Definition
Changes in Elevation
Term
Dry Adiabatic Rate vs Moist Adiabatic Rate
Definition
Moist is less than Dry
Term
Enviornmental Lapse Rate
Definition
Rate at which air temp will be changing if you climb higher
Term
Stability of Atmosphere is determined by:
Definition
Comparing the temperature of a rising parcel to that of its surroundings
Term
Stable Atmosphere
Definition
Rising air is colder and heavier than air surrounding it
Term
Unstable Atmosphere
Definition
rising air parcels are warmer and less dense than air around them
Term
Conditionally unstable atmosphere
Definition
Atmosphere is Unstable for saturated parcel
Term
Stable air vs Unstable Air
Definition
Stable air resists upward movement
Term
What brings an unstable atmosphere?
Definition
Environmental lapse rate is greater than dry adiabatic rate
Term
What brings a stable atmosphere?
Definition
Enviornmental lapse rate is less than dry adiabatic rate
Term
Cloud Droplet Growth Method 1
Definition
1) Accretion- Falling ice crystals collide with super cooled droplets
Term
Cloud Droplet Growth Method 2
Definition
2) Aggregation- Falling ice crystals collide with other ice crystals
Term
Ice Crystal Process
Definition
Where clouds extend upward into regions where the air temp is below freezing
Term
Collision and Coalescence Process
Definition
How Precipitation is made in Warm Clouds
Term
Cold Cloud vs Warm Cloud
Definition
Warm clouds make rain with collision and coalescence process. Cold clouds extend high into regions where air temp is freezing
Term
Rain
Definition
0.05 mm or greater falling drops
Term
Virga
Definition
Falling streaks that evaporate before reaching the ground
Term
Snow
Definition
Below Freezing in cloud and reaches the ground
Term
Sleet
Definition
Melting snowflakes fall to ground through deep subfreezing layer of air
Term
Freezing Rain
Definition
Supercooled rain that reaches the ground, form thin ice layer
Term
Snow Pellets
Definition
Grains of ice formed by Accretion in cloud, Also called Graupel
Term
Hailstones
Definition
Develop in cumulonimbus clouds where strong updrafts exist
Term
Measuring Precipitation through:
Definition
1) Standard Rain Gauge
2) Tipping Rain Gauge
3) Weighing Rain Gauge
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