wind driven ocean circulation - gold coast science network · cool teacher professional development...
TRANSCRIPT
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Wind Driven Ocean Circulation Maury Project Module
American Meteorological Society
Anne Marie Wotkyns
Kittridge School for Advanced Studies
Van Nuys LAUSD
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Maury Project
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Maury Project Modules
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Drop a
bottle in the
ocean.
Predict
where does
it end up?
https://goo.gl/UbeJ7w
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Historically a Very Difficult Question… A Guarded Secret…
https://goo.gl/jfhTfY
ExplorersWhalershttps://goo.gl/jr6RbY
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Ben Franklin was the Colonial deputy Postmaster General (1753-1774) noticed that British vessels took days to weeks longer to cross the Atlantic than their American counterparts.
The British wanted to know why...
https://goo.gl/82DV4S
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After consulting with his cousin, Timothy Folger, a whaling captain from Nantucket, published the map on left
It is interesting
that even after
Franklin’s
information,
British authorities
didn’t take
advantage of the
insight
Ocean Studies Book p 156
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Matthew Fontaine Maury
From his Physical Geography of the Sea, 1855
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Clearly there is movement, current in the ocean, but what causes the current?
NASA’s Perpetual Oceanhttps://www.youtube.com/watch?v=xusdWPuWAoU
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Winds and Ocean Currents
Do a little activity
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Here’s what you are doing….
0°0°
Place
● Desired map under
water container
● Paper punches on
the surface of the
water
Blow
● Air with straw down
the 0° line (the
equator from the right
side of the bowl to
the left)
Observe
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Try with multiple people doing….
0°0°
Blow
● Blow with straw down
the 0° line
● With additional
straws, (and
additional people)
blow at 50-60° both
north and south from
left to right.
● Observe
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When you finish observing, pick up and readIntroduction: Wind Driven Ocean Circulation
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GyresLarge circular wind driven currents found in the ocean basins
Gyre Locations determined by three factors1. Earth’s Rotation2. Location of Earth’s major wind belts3. Continents
https://goo.gl/ZpD44B
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http://slideplayer.com/slide/735491
9/
Origin of
Wind…
Atmospheric
Heating and
Cooling
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https://oceanservice.noaa.gov/educ
ation/tutorial_currents/media/supp_
cur04c.html
Origin of
Wind…
Atmospheric
Heating and
Cooling
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Global Wind
Patterns
https://goo.gl/VLJrkR
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Earth’s rotation causes water to pile up on western side of ocean basin.
https://goo.gl/QR7z8E
But the Earth rotates
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Coriolis Effect…
Another Effect of the Earth’s Rotation
Air and water are both
deflected because of the
earth’s rotation.
Clockwise in the
Northern Hemisphere
Counterclockwise in the
Southern Hemispherehttps://oceanservice.noaa.gov/educ
ation/kits/currents/media/supp_cur0
5b.html
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https://oceanservice.noaa.gov/education/tutorial_currents/media/supp_cur04e.html
Eckman Transport Spiral
In addition to
surface effect,
there is a
dimensional
effect, an almost
corkscrew-like
circulation
pattern
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So the actual ocean currents are
complicated...
https://www.nasa.gov/topics/earth/f
eatures/perpetual-ocean.html
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So is finding our bottle hopeless?
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Project Maury Activity:
Predicting Surface Ocean Currents
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Make a
Prediction for
the Major
Ocean Gyres
(currents)
Where do you
think they are
found?
With the Maury activities, there is lots of versatility, room for creative implementation
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● Take one paper of each color.● Cut apart the cards. Put in piles by color.● Follow the directions on pages 5-6 of teacher
guide.● Use blue colored pencils for cool/cold currents
and red for warm/warming currents (draw arrows to represent currents.)
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.Check the cards
to see if you were
right and what
other information
you could glean
from the cards
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After you’re done, check out the questionnaire/formative assessment with the activity
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Check
Your
Work
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Answers
if you
wish...
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Answers if
you wish...
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Answers if
you wish...
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https://oceanservice.noaa.gov/educ
ation/tutorial_currents/04currents3.
html
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https://www.atmos.washington.edu/academics/classes/2012Q4/101/lect13_overhe
ads.pdf
Movement of water moves
energy from the equator to the poles
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Moran Ocean Studies p. 164
Western side of basin narrow, fast moving, deep currentEastern side of basin broad, shallow, slow current
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Tropics pile water up on western margin of ocean basin.. Steady trade winds and westward flowing equatorial currents…
https://goo.gl/VAs7Gf
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Equatorial currents result in equatorial counter currents
El Nińo and La Nińa and Cyclical weather patterns
https://goo.gl/U6p8sD
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Upwelling… Bioproductivity in the Oceans
https://oceanservice.noaa.gov/facts
/upwelling.html
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https://www.atmos.washington.edu/academics/classes/2012Q4/101/lect13_overhe
ads.pdf
Notice
colder,
upwelling
areas along
California’s
and Peru’s
coastal
regions
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So, where is your bottle?
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The Great Pacific Ocean Garbage Patch
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Cool Teacher Professional Development Opportunities
● PolarTREC - Arctic or Antarctica● Earthwatch TEACH Earth – Mexico, Ecuador, USA● American Wilderness Leadership School (AWLS)– Jackson Hole, WY● The Maury Project – Annapolis, MD● Project Atmosphere – Kansas City, MO● Forestry Institute for Teachers (FIT) – central/northern CA● NOAA Teacher at Sea – various shipboard expeditions● Library of Congress Teaching with Primary Sources (TPS) –
Washington DC● On the Farm – American Farm Bureau – various locations (OR, TX, KS,
NY)
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Survey and Teacher’s GuidePlease complete the
participant’s
questionaire....
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A wonderful resource is...
Joseph Moran 3rd Edition
ISBN-10 1-878220-49-9
Or
ISBN-13 978-1-878220-48-6