Clouds and precipitation19
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Clouds and precipitation19

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Clouds and precipitation19 Clouds and precipitation19 Presentation Transcript

  • Clouds and Precipitation By: Meredith Pesce
  • http Adiabatic Temperature Changes And ://w ww. kids Expansion and Cooling geo. com /geAdiabatic Temperature Changes ogra • Change in Temperature, phy- for- with out anything being kids added to the air. /00 70- • Dew point stays the same adia • Requires energy to move bati molecules around. c- temExpansion and Cooling pera• For every 1000 meters you ture go up, them temperature - cha will cool 10 degrees Celsius nge• Works vice versa s.ph p
  • Orographic Lifting• Objects like mountains or hills block air flow• As the air rises, it cools. Often creating condensation.• Later it heats up on the other side of the mountainhttps://earthscience-in-the-nationalparks.wikispaces.com/Death+Valley
  • Frontal wedging• When warm and cool air collide creating a weather “front” which pushes air across a certain area• Cool denser air acts as a barrier• Then causing the warmer, less dense air, to ride http://www.geo.hunter.cuny.edu/~tbw/ wc.notes/4.moisture.atm.stability/front al_wedging.htm
  • Convergence• When Air in the lower atmosphere flows together to give lifting results.• When the two masses hit they flow upwards• This generally creates Adiabatic Changes http://apollo.lsc.vsc.edu/ classes/met130/notes/ch apter6/lift_converge.html
  • Localized Convective Lifting• Un-even heating of Earths surface from air particles• When the warm air rises above a certain condensation point it can create clouds• It also creates thermals which is rising hot air and birds can use it to fly.http://rst.gsfc.nasa.gov/Sect14/Sect14_1cl
  • Condensation• Condensation is a change from gas to liquad• It can only occur on surfaces, usually like a car window, grass and a glass.• The particles are so fin the san just suspend in air until there is something to condensate on. http://keep3.sjfc.edu/studen ts/kes00898/e- port/condensation%20page %20for%20unit.html
  • Types of clouds• Cirrus: Often look like the pieces of a ripped up cotton ball, little wispy hairs.• Cumulous: Rounded clouds which look• like domes, or powdered sugar.• Stratus: Like a sheet in the sky. It covers the sky in layers
  • High Clouds • Generally these clouds are made of tiny little ice crystal • These clouds usually do not precipitate • The seem to be very lighthttp://www.ksl.com/?nid=341&sid=148078
  • Middle clouds• You can see the sun and moon’s light through these clouds• They are white and gray• Slightly fluffy but arent too dense http://www.flickr.com/groups/skyandcloud s/discuss/72157606548215685/
  • Low clouds • Accumulate around mountain ranges • Mostly stratus clouds • Mad up of little water dropletsshttp://www.free-online-private-pilot-ground-school.com/Aviation-Weather-Principles.html
  • Clouds of Vertical Development• These are generally cumulonimbus clouds• The could happen around places that have unsteady air• Often create precipitationhttp://www.astrobio.net/pressrelease/3936/the-secrets-of-the-rain
  • Fog Caused by warmingCaused by Cooling • When moisture evaporates• When cold prevailing winds and creates saturation meets damp warm air it • Generally happens when creates fog cold air moves over warm• Also when a freezing water popsicle lands on a warm black top its instantly creates fog http://houseforlorn.blogspot.com/2008/09/riv er-of-clouds.html
  • Cold Cloud Precipitation • There is a lot of water in these clouds so the don’t start freezing until they are in a range of -32f to -40f degrees. • Clouds create snow and or hail • The water vapor will condense faster on colder ice like objectshttp://rst.gsfc.nasa.gov/Sect14/Sect14_1d.html
  • Warm Cloud Precipitation • This happens when air is fully saturated • The growth of a water droplet occurs when it merges with other droplets as its falling out of the cloud • As it cools condensation will occur on Water soluble materialshttp://san.hufs.ac.kr/~gwlee/session8/droplet.html
  • Rain And Snow• Rain is just large water • Made up of frozen droplets that are large water crystals enough to reach the • In order for snow to fall ground it must be below 32f• It could take many degrees. droplets of water to create one that will touch the ground• If we pollute to much we can create acid rain http://www.nelsoncountylife.com/2010/11/03 /snow-showers-possible-in-highest-elevations- late-thursday-night/
  • Sleet, Glaze and Hail• Sleet is created by • Hail is just uneven layers of a raindrop frozen water droplets in which all have different clouds temperatures as they • They usually form in fall from the sky thunder storms and• Glaze occurs when a heavy clouds light rain covers trees or grass which an catch the rain http://cs.wikipedia.org/wiki/Ledovka