www.southalabama.edu/academicsuccess/js_student.shtml
Select the “Reality Check” Link
Do the Learning to Learn Survey and the
Study Skills Assessment Survey
www.southalabama.edu/academicsuccess/reality_check.shtml
When you submit the survey, you should get an
acknowledgement of completion page. Print that for each
survey. Be sure the page has your email or J# on it. Also
print your name on each page. On the back of one of the
two pages, write a paragraph about what you will do to
improve your performance in this class. Turn it in for 5
points extra credit on Exam 2. You must complete this and
turn it in BEFORE March 12.
Extra credit assignment open to all students in this class
regardless of JagAlert status.
High
Divergence
aloft
Low
Convergence
aloft
GEO 102
Thursday, Feb. 20, 2014
Review
Horizonal and vertical circulation
Coriolis Force
New material
Global wind and pressure belt system
Ocean circulation
Coriolis Force: an apparent force caused by earth’s rotation
that deflects freely moving objects from their path of motion.
To right of path of motion, in northern hemisphere
To left of path of motion, in southern hemisphere
Coriolis Force is strongest near the poles,
Rising
air
Descending
air
Low
Converging
air
weakest near the equator.
High
Diverging
air
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NECESSARY CONCEPTS
Descriptive terms
1. Pressure is indirectly related to temperature.
Latitude
Polar High
90ºN
Polar Easterlies
2. Air flows from areas of high pressure to areas of low
pressure.
3. The Coriolis Force deflects air flow to the right of its path
of motion in the Northern Hemisphere and to the left
of its path of motion in the Southern Hemisphere.
4. Surface low pressure has converging surface air flow,
rising air, and diverging air flow aloft.
60-90ºN
Subpolar Low, Polar Front
30-60ºN
Subtropical High
Horse latitudes 30ºN
N.E.Trade Winds
Subtropical High
0-30ºS
Horse latitudes
30ºS
30-60ºS
Subpolar Low, Polar Front
Polar Easterlies
L
Circ.
H
Circ.
0-30ºN
Doldrums
0º
Equatorial Low ITCZ
S.E.Trade Winds
Westerlies
5. Surface high pressure has diverging surface air flow,
descending air, and converging air flow aloft.
60ºN
Westerlies
Surf.Pressure, Why?
H
Cold
60ºS
60-90ºS
Polar High
90ºS
L
Hot
H
Circ.
L
Circ.
H
Cold
Net radiation
January
Icelandic
Low
Siberian
High
July
Bermuda
High
Continentality affects Northern hemisphere
Southern hemisphere is more zonal
Asiatic
Low
Northern hemisphere is more ‘continental”
Southern hemisphere is more zonal
2
July
High pressure cells in oceans drive ocean surface currents
Land
Land
Ocean gyre
Ocean surface currents
H
Equatorial
Counter
Current
Ocean gyre
H
Drift buoy directional data
Equatorial counter current
Drift buoy directional data
http://oceancurrents.rsmas.miami.edu/index.html
3
http://fermi.jhuapl.edu/avhrr/gm/index.html
Drift buoy speed data
Water surface temperature: AVHRR for 7 days
ending Feb 22, 2010
4