2. http
Adiabatic Temperature Changes And ://w
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Expansion and Cooling geo.
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Adiabatic 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-
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Expansion and Cooling pera
• For every 1000 meters you ture
go up, them temperature -
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will cool 10 degrees Celsius nge
• Works vice versa s.ph
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3. 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
mountain
https://earthscience-in-
the-
nationalparks.wikispaces
.com/Death+Valley
4. 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
5. 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
6. 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
7. 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
8. 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
9. High Clouds
• Generally these clouds are made of tiny little
ice crystal
• These clouds usually do not precipitate
• The seem to be very light
http://www.ksl.com/?nid=341&sid=148078
10. 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/
11. Low clouds
• Accumulate around mountain ranges
• Mostly stratus clouds
• Mad up of little water dropletss
http://www.free-online-private-pilot-
ground-school.com/Aviation-Weather-
Principles.html
12. Clouds of Vertical Development
• These are generally cumulonimbus clouds
• The could happen around places that have
unsteady air
• Often create precipitation
http://www.astrobio.net/pressrelease/3936/th
e-secrets-of-the-rain
13. Fog
Caused by warming
Caused 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
14. 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 objects
http://rst.gsfc.nasa.gov/Sect14/Sect14_1d.htm
l
15. 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 materials
http://san.hufs.ac.kr/~gwlee/session8/droplet.
html
16. 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/
17. 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
