chapter 7 Flashcards
What is convergent lifting?
low P, rising on a cloud
**ex.) ITCZ, Lows(cyclones)
What is Convectional Lifting?
Warm Air Rising up
**ex.)dark surfaces,wild fires
What is lifting condesation?
When warm air rises, to cloud joins it, then goes back down. Cycle Repeats
What does Orographic Lifting produce?
Rain in windward side
Rain shadow in leeward side
chinook winds on leeward side
For Orographic Lifting, what is on the left side?
Windward Side
Rain
For Orographic Lifting, what is on right side?
Leeward Side
“rain shadow”
“chinook” winds
`
What are the two types of Frontal Lifting?
Cold Fronts
Warm Fronts
Describe Cold Fronts
Blue triangles
forces warm air up
400km
Describe Warm Fronts
Red Semi-Circles
Warm Air moves up, over cold
1000km
Source Region=?
Large,flat,homogenous
Define Air Masses?
homogeneous body of air that takes the temp and moisture
***taken by SOURCE REGION
What is a good source region?
Ocean,deserts,plains, tropics, artic
What is a bad source region?
mountains
midlatitudes
What are the different types of humidity?
m = maritime
c = continental
What are the different types of Temp?
A = Artic
P = Polar
T = Tropical
***E= eqatorial ; AA = Antartic
How does an Occluded Front look like?
The blue triangles are facing up.
Red Starts first
How does a stationary front look like?
Blue Triangles are facing down
Red starts first
Define cyclone?
Area of Low P with converging and rising air
“Wave” Cyclones are called like that bc?
They travl westerly across US in waves
How many stages does a midlatitude cyclone develop?
4
Describe the Midlatitude Cyclone
1.) Cyclogensis( started as a stationary front)
2.) Open Stage
3.) Occluded Stage(cold front caugh up)
4.Dissolving Stage (area is warm)
What are the types of Severe Weather?
thuderstroms
tornadoes
tropical cyclones
Where do thunderstroms develop?
wamr/moist air
along cold fronts
orographic lifting
What are the three stages of thuderstroms?
1.) develop(cumulus)
2.) mature (precipation starts)
3.) dissipating
Hailstones, describe?
Strong warm air rises, cools downs goes to back. Hail Shower
Describe tornadoes?
form in severe thunderstorms
100m of diameter
winds up tp 300mph
45-55 mph speed
path length 7m
FujitaScale
69%
Weak
Fujita Scale
29%
Strong
Fujita Scale
2%
Violent
Describe tornado Formation
Top- Strong Wind
spinning along horizontal
bottom- weaker wind
Where do the tropical cyclones happen?
Tropic of Cancer & Capricon
How do Tropical Cy. form?
Easterly Waves
5-30 degrees
*No warm/cold fronts
*No differing air masses
What are easterly waves?
“Bumps” in Trade Winds
Describe Easterly Wave?
Convergence
*Rising Air
* Thuderstorms
Where do Hurricanes most occur?
Atlantic
east pacific
Where do typhoons occur?
west pacific
where do cyclones occur?
indian ocean
south pacific
Describe Hurricanes?
100-600 diameter
last ~1 week
move 10-25 mph
Strong Low P
Forms in tropics (26.5degrees)
Die over land or cool ocean
describe the featues of hurricanes?
inward rising air
eye is driest part(weak air)
eye 10-25 diameter
What are the impacts of Hurricanes
Flooding
High Winds
Tornadoes(weak can form)
Strom Surge(rise of sealevel water)
