Chapter 5 Flashcards
What is the inverse of temperature?
Pressure
What cause wind to blow?
Sea level pressure
High Temp = ?
*(hot)
Low P
(pressure and density)
Low Temp =?
*(cold)
High P
(pressure and density)
Rising Air =?
Low P at the Surface
Sinking Air =?
High P at the surface
What does pressure cause air to do?
Causes air to move from High to Low P
Wide Isobar Spacing =?
Light Winds
Close Isobar Spacing?
Strong Winds
Stronger pressure gradient =?
Stronger wind speed
What does High pressure do to air?
Air Diverges
*Sinks,(fills in)
What does Low P do to air?
Air converges
*rises
Define Coriolis Force?
apparent deflection of moving objects
*cause by Earth Rotation
Corilis Force affects?
direction of movement
What direction is deflection in the North Hemp.?
Right
What direction is deflection in the South Hemp.?
To the left
North Pole goes which direction?
Counter-Clockwise
South Pole goes what direction?
Clockwise
What Coriolis Force need to function?
Latitude
Wind Speed
* Maxium spin in at the top(pole).
* No spin is in the equator
Geostrophic Wind, is made up of two things?
Pressure Gradient Force + Coriolis Force
***ONLY IN THE MIDDLE & UPPER TROPOSPHERE
Wide Isobars =?
Light Winds
High Pressure
Gradual Pressure G
Close Isobars =?
Strong Winds
Low Pressure
Steep Pressure G.
Northen Hemp., describe a anticyclonic geostrophic
High P
clockwise
Northen Hemp., describe a cyclonic geostrophic
Low P
counter-clockwise
Southern Hemp., describe a anticyclonic geostrophic
High P
Counterclockwise
Southern Hemp., describe a cyclonic geostrophic
Low P
Clockwise
High P
Anticyclonic
counterclockwise
South Hemp
Low P
cyclonic
clockwise
South Hemp
High P
Anticyclonic
clockwise
North Hemp
Low P
Anticyclonic
counterclockwise
North Hemp
Where does Friction occur?
Below 1000m
What does frction affect?
It decreases wind speed
Friction slows down wind —>
Decreases Corilis and crosses wind isobars
PGF + Coriolis =
PARELLEL Isobars
PGF + Coriolis, produce what kind of wind?
Geostropic Wind
PGF + Coriolis + Friction =
CROSSES isobars
PGF + Coriolis + Friction , produce what kind of wind?
Surface Wind
**Rmb friction only happens below 1000m!
Where does Geostropic Wind happen?
Upper/mid troposphere
North Hemp with Friction: H
AntiCyclonic
Divergent
Clockwise
North Hemp. with Friction: L
Cyclonic
Convergent
Counterclockwise
South Hemp with friction: H
Anticyclonic
Divergent
Counterclockwise
South Hemp with Friction: L
Cyclonic
Convergent
Clockwise
What are the Global Pressure Zones?
Polar High
Subpolar Low
Subtropical High
equatorical low
NE trade winds, go which direction?
down right
SE trade winds go which diirection?
up left
What kind of pressure does the Easterly trade Winds have?
High P
What kind of pressure does ITCZ have?
***equator
Low P
What makes up Hadley cells?
Trade Winids Converge + Air rises at ITCZ
**air travels upper to the poles; then cools and sinks back down around
Subtropical High, describe==
near 30 degrees N/S
High P
hot,dry
clear, warm, calm weather
Westerlies, decribe==
Diverging Wnds North of Hadley Cells
30 - 60 degrees N/S
Subpolar Lows, describe=?
60 degrees N/S
cool,moist air, clouds
strongest in winter
Polar High, describe?
90 degrees N/S
persistent in South Hemp
seasonal in North Hemp.
cold/dry air
What are the Jet streams?
Polar Front ( 30-70 degrees)
Subtropical (20-50 degrees)
