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,
o 50 multiple choice, similar to midterm
• 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
• 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
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 “squished” in towards “intertropical
▪ 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