Geography 121 Final
Terms
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- What is Diabatic Process?
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-direct energy exchanges
-ex:air passing over a cool surface loses energy through conduction
-energy transfer: from high temps to lower temps
-associatied w/ fog develop. - What is Adiabatic Process?
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-no net energy exchanges
-heating/cooling by compression/expansion - What is the definition of a cloud?
- visible aggregate of minute droplets of water, or tiny crystals of ice, or a mixture of both
- How are clouds produced?
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-when water vapor condenses in the atmosphere
-Most important: adiabatic cooling
-rising air is lifted above the lifting condensation level, where it reaches its dewpoint - What two conditions need to be fulfilled in order to form a cloud?
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when air is SATURATED and CONTAINS PARTICLES (condensation nuclei)
-ex: smoke, salt particles - Cirrus clouds
- thin clouds of ice, feathery appearance or veil-like patches
- Stratus clouds
- layered clouds, sheets or layers w/ no distinct indevidual cloud unit
- Cumulus clouds
- vertical development, cauliflower-like structure
- Nimbus clouds
- rain producing cloud
- High clouds (height and examples)
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-above 6000m (19000 ft)
-ex: cirrus, fall streaks, mares' tails, cirrostratus, cirrocumulus - Mares' Tails
- horizontal swirls, occur in turbulent conditions
- Cirrostratus
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-when cirrus thickens and stretch across the sky
-thin sheet of ice crystal
-milky sky
-may form HALO around sun - Cirrocumulus
- Fish Scales
- Middle cloudes (height and examples)
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-between 2000&6000m (6000-19000ft
-ex: altostratus, altocumulus - Altostratus
- if thin enough, sun or moon can be identified as bright spot W/O HALO
- Altocumulus
- Sheepback clouds
- Low clouds (height and examples)
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-below 2000m (6000ft)
-ex: stratus, nimbostratus, stratocumulus - Nimbostratus
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-layer of dark gray clouds
-light precipitation - Stratocumulus
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-patches, rolls
-low layered clouds w/ some vert development - What is the Fair Weather cumulus?
- Cumulus Humilis
- Cumulonimbus
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-heavy rainfall, thunderstorms, hail, lightning, tornadoes
-anvil top, towering cloud