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Weather & Climate
Hydrologic Cycle, El Nino, Atmospheric Lifting Mechanisms & More
46
Geology
Undergraduate 2
10/28/2012

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Cards

Term
Hydrologic Cycle
Definition
Movement of water through the atmosphere
Term
Movement of Water Though Hydrologic
Definition
Evaporation ->Condensation ->Precipitation ->Runoff
Term
Saturation
Definition
Liquid droplets/ice crystals
Term
Sublimation
Definition
Process that turns solid to gas
Term
Deposition
Definition
Process that turns vapor to solid
Term
Humidity
Definition
Amount of water in air
Term
Relative Humidity
Definition
Indicates how close air is to saturation rather than actual quantity of water vapor in air
Term
Relative Humidity Calculation
Definition
(Actual H20 vapor in air / max H20 vapor possible in air at that temp) X 100
Term
Dew Point Temperature
Definition
Temperature air is cooled to reach saturation, measure of moisture content
Term
Sling Psychrometer
Definition
Two identical thermometers, One dry measures air temp, one wet measures dryness larger the difference in temps between wet & dry, the lower the humidity
Term
Radiation Fog
Definition
Radiation cooling of ground and air, slight breeze needed
Term
Advection Fog
Definition
Warm, moist air blowing over cold surface, 10-30 kph winds
Term
Upslope Fog
Definition
Humid air moves up a sloping land form/mountain, air expands then and cools adiabatically
Term
Steam Fog
Definition
Cool air moves over warm water, moisture evaporates and saturates the air
Term
Frost
Definition
Moisture in air condenses on surface already below freezing, Ice crystals form
Term
Frozen Dew
Definition
Temp drops below dew point, Continues to drop below freezing, Ice forms
Term
What atmospheric parameter always decreases with height?
Definition
Pressure
Term
What does expanding air do?
Definition
Cools
Term
What does compressed air do?
Definition
Warms
Term
WAR (Wet Adiabatic Rate)
Definition
Air ascends above lifting condensation level, 5°C/1000m or 3.3°F/1000ft
Term
DAR (Dry Adiabatic Rate)
Definition
Unsaturated air cools at rate 10°C/1000m or 5.5°F/1000ft
Term
LCL (Lifting Condensation Level)
Definition
Condensation is triggered when air rises to its saturation point, Clouds forms
Term
Orographic Lifting
Definition
Occurs when elevated terrains act as barriers to flow of air
Term
Frontal Wedging
Definition
Masses of warm & cold air collide producing fronts
Term
Convergence
Definition
Horizontal air flow results in upward movement
Term
Localized Convective Lifting
Definition
Unequal surface heating causes localized pockets of air to rise
Term
Stable Air
Definition
Resists vertical movement
Term
Unstable Air
Definition
Rises due to buoyancy
Term
Environmental Lapse Rate (ELR)
Definition
Actual temp of atmosphere
Term
Absolute Stability
Definition
State of air in atmosphere when its lapse rate of temp is less than saturation-adiabatic lapse rate
Term
Absolute Instability
Definition
State of air in atmosphere when it's superadiabatic lapse rate of temperature is greater than dry-adiabatic lapse rate
Term
Conditional Instability
Definition
Moist air has an environmental lapse rate between dry and wet adiabatic rates
Term
Two Criteria by which Clouds are Classified
Definition
Form & Height
Term
Cirrus
Definition
White & thin; High clouds
Term
Cirrocumulus
Definition
Large, white patch without gray shadow; High clouds
Term
Cirrostratus
Definition
Thin, uniformed, halo; High clouds
Term
Cumulus
Definition
Globular, usually exhibiting flat base; Middle clouds
Term
Altocumulus
Definition
Globular masses in patches; Middle clouds
Term
Stratus
Definition
Layers covering much of sky; Low clouds
Term
Stratocumulus
Definition
Large dark, rounded masses in groups, lines or waves; Middle clouds
Term
Altostratus
Definition
Uniform bluish-gray sheet/layer; Middle couds
Term
Cumulonimbus
Definition
Tall, dense, thunderstorms; Middle/High clouds
Term
Nimbostratus
Definition
Formless layer, dark gray; Low clouds
Term
High Clouds
Definition
Above 6000m
Term
Middle Clouds
Definition
Between 2000-6000m
Term
Low Clouds
Definition
Under 2000m
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