chapter 7 Flashcards by Paola Figueroa

What is convergent lifting?

low P, rising on a cloud

**ex.) ITCZ, Lows(cyclones)

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What is Convectional Lifting?

Warm Air Rising up

**ex.)dark surfaces,wild fires

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What is lifting condesation?

When warm air rises, to cloud joins it, then goes back down. Cycle Repeats

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What does Orographic Lifting produce?

Rain in windward side
Rain shadow in leeward side
chinook winds on leeward side

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For Orographic Lifting, what is on the left side?

Windward Side
Rain

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For Orographic Lifting, what is on right side?

Leeward Side
“rain shadow”
“chinook” winds

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What are the two types of Frontal Lifting?

Cold Fronts
Warm Fronts

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Describe Cold Fronts

Blue triangles
forces warm air up
400km

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Describe Warm Fronts

Red Semi-Circles
Warm Air moves up, over cold
1000km

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Source Region=?

Large,flat,homogenous

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Define Air Masses?

homogeneous body of air that takes the temp and moisture

***taken by SOURCE REGION

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What is a good source region?

Ocean,deserts,plains, tropics, artic

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What is a bad source region?

mountains
midlatitudes

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What are the different types of humidity?

m = maritime
c = continental

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What are the different types of Temp?

A = Artic
P = Polar
T = Tropical

***E= eqatorial ; AA = Antartic

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How does an Occluded Front look like?

The blue triangles are facing up.
Red Starts first

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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?

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)