clouds and precipitation project
TRANSCRIPT
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CLOUDS AND PRECIPITATION PROJECT
By: Erinne Finlayson
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Adiabatic Temperature Change and Expansion and Cooling
When air expands it cools but when air is compressed it warms.
The dry adiabatic rate is when cooling and heating only affect unsaturated air.
Farther off the earths surface the less pressure.
http://www.kidsgeo.com/geography-for-kids/0070-adiabatic-temperature-changes.php
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Orographic Lifting
Mountains act like walls to air flow causing Orographic lifting.
Windward side of mountain will be rainy.
Leeward side will be dryer. http://www.examiner.com/outdoorsman-in-salt-lake-city/understanding-why-
utah-has-the-greatest-snow-on-earth-part-1-orographic-lifting
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Frontal Wedging
Cool and warm air collide producing fronts.
Cooler air is more dense than warm air.
Cool air asks like a wall against warmer air.
http://www.harding.edu/lmurray/113_files/HTML/d2_Earth%20Revised/sld046.htm
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Convergence
The different air masses force air to rise.
Convergence is when the lower atmosphere mix together.
Florida peninsula is a good example. http://keithrogershome.com/
Chap8Clds.html
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Localized Convective Lifting Warmed air Warm parcles of air rise and form
condensation clouds. May cause rain showers.
http://rst.gsfc.nasa.gov/Sect14/Sect14_1c.html
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Stability
Unstable air moves up Stable air dose not Unstable air= Thunderstorms maybe
even tornados
http://www.richhoffmanclass.com/chapter4.html
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Condensation
Water vapor changes to liquid. (Gas to liquid)
Air must be saturated Results in dew, fog, or clouds. http://www.scottslumber.com/services/
window-condensation-are-my-windows-defective/
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Types of Clouds
Clouds are formed by form and height.
Types Cirrus (curl of hair) is seen as a white
cloud. Cumulus (a pile) is seen as rounded
separate cloud masses. Cauliflower structure.
Stratus (a layer) seen as sheets or layers that cover most or all of the sky.
http://ed101.bu.edu/StudentDoc/current/ED101fa10/jenmks/
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High Clouds
Found over 6,000 meters off of earths surface. Cirrus and Cirrostratus are two possible clouds
found as a high cloud. Warning of stormy weather coming. http://www.zastavki.com/eng/Nature/Clouds/wallpaper-14253.htm
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Middle Clouds
Found around 2,000-6,000 meters off of earths surface.
These clouds are white or gray. They warn of a little snow or drizzle. http://acrosstheuniverse.forummotion.com/t862-i-ve-looked-at-clouds-from-
both-sides-now
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Low Clouds
Seen as rainy clouds Located below 2,000 meters from the Earth’s
surface. Created when air is forced up. Stratus and Stratocumulus are some clouds
that can be found here. http://bmvgallery.com/tag/clouds/
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Clouds and Vertical Development
Made up of unstable air These clouds cause showers and
thunderstorm. A upward movement is strong enough to give
many clouds a great vertical rang form. http://www.uwgb.edu/dutchs/
EarthSC102Notes/102Clouds.htm
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Fog
Fog and clouds are the same thing, they are just created in different place.
Fog is the cooling or movement over something cold.
Fog is found very close to the ground. http://helicopterblog.com/?p=276
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Cold Cloud Precipitation
It the ground is 0 degrees Celsius it must be at least -40 degrees Celsius in the clouds to create snow, hail, ext.
When ice crystals contact cloud drops they cause them to freeze.
Supper cold water will freeze if it impacts the ground.
http://nasasport.wordpress.com/2011/08/26/amsr-e-maps-rain-associated-with-irene/
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Warm Cloud Precipitation
When water absorbing partials remove water vapor from air at relative humidity.
Salt can remove water vapor from the air. Tropics is an example of warm cloud
Precipitation http://hdwallpapersdesktop.com/wallpapers/2011/08/wallpaper-ocean-tropics-clouds-boat-
island-yacht-photo/wallpaper-ocean-tropics-clouds-boat-island-yacht-photo-2/
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Rain and Snow
Rain- drops of water that falls from clouds. Must be a least .5mm.
Snow- made up of separate 6-sided crystals.
Warmer that -5 degrees Celsius, ice crystaly join in large clumps.
http://totallycoolpix.com/2011/01/us-east-coast-snow-storms/
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Sleet, Glaze and Hail
Sleet-small particles of clear-to-translucent ice.
Glaze- Freezing rain that was freezing before hitting objects.
Hail- cumulonimbus clouds ice pellets. http://www.erh.noaa.gov/cle/wx_events/2008/2008end.php
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CLOUDS AND PRECIPITATION PROJECT
By: Erinne Finlayson
THE END!!!