EAS100 Lecture Notes - Lecture 26: Intertropical Convergence Zone, Westerlies, Polar Front

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EAS 201: Lecture 26
March 6, 2019
Lecture notes & images borrowed from Karlis Muehlenbachs’ slides March 6, 2019.
Midterm 2 will cover text chapters 8, 9, 10,
and 11.
o 50 multiple choice, similar to midterm
1.
Some of sun’s energy approaching Earth is
filtered out by clouds and the like.
o Thus reducing the actual amount of
sun’s energy we feel/receive here.
o Also dependent on location on planet,
some areas receive more energy than
others.
Extra heat not absorbed will move one way
or the other (to North or South pole).
o Carried by oceans and/or atmosphere.
Hadley Cells:
o Are major circulatory cells that stretch from the equator to 30 degrees N & S
latitude.
o Air carrying a lot of moisture (from ocean evaporation), it moves up and cools
which causes it to sink like a never-ending cycle.
o Warm air rises in tropics creating a low-pressure zone of convergence (ITCZ).
Air also moves up b/c of it being “squishedin towards intertropical
convergence zone”.
Air piles up here, creating 2
belts of high-pressure air
sinking towards surface
creates zone of divergence.
o Contains high-level winds
(westerlies) and low-level winds
(trade winds).
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