Ocean Circulation

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  • Ocean Circulation

    1. 1. Components of the Climate System <ul><li>Atmosphere </li></ul><ul><li>Ocean </li></ul><ul><li>Biosphere </li></ul><ul><li>Geosphere </li></ul>Image from NASA
    2. 2. Atmosphere & Ocean Circulation <ul><li>Atmospheric Circulation </li></ul><ul><ul><li>Depends on density </li></ul></ul><ul><li>Ocean Surface Circulation </li></ul><ul><ul><li>Depends on the wind </li></ul></ul><ul><li>Deep Ocean Circulation </li></ul><ul><ul><li>Depends on density </li></ul></ul>
    3. 3. Why is Ocean Circulation Important? <ul><li>Transport ~ 20% of latitudinal heat </li></ul><ul><ul><li>Equator to poles </li></ul></ul><ul><li>Transport nutrients and organisms </li></ul><ul><li>Influences weather and climate </li></ul><ul><li>Influences commerce </li></ul>
    4. 4. Temperature Structure of Ocean thermocline
    5. 5. Ocean Circulation
    6. 6. Wind-drive ocean surface currents Wind driven surface currents <ul><li>How fast? A few miles/hr (Gulf Stream off of Miami = 4.5 mph) </li></ul><ul><li>How much? Total water in ocean surface circulation = about 100 Amazon Rivers (20 million m 3 /s). </li></ul>
    7. 7. Atmosphere & Ocean Circulation <ul><li>Atmospheric Circulation </li></ul><ul><ul><li>Depends on density </li></ul></ul><ul><li>Ocean Surface Circulation </li></ul><ul><ul><li>Depends on the wind </li></ul></ul><ul><li>Deep Ocean Circulation </li></ul><ul><ul><li>Depends on density </li></ul></ul>
    8. 8. Sea Surface Temperature http://www.ldeo.columbia.edu/dees/ees/climate/slides/sst_march.gif
    9. 9. Ocean Salinity <ul><li>http://www.ldeo.columbia.edu/dees/ees/climate/slides/sal_march.gif </li></ul><ul><li>http://ingrid.ldgo.columbia.edu/ </li></ul>
    10. 10. Temperature-Salinity (density) Diagram
    11. 11. Thermohaline Circulation North Atlantic Deep Water (NADW 15 million m 3 of near surface water descend into the deep ocean each second.
    12. 12. Thermohaline Circulation - The Ocean Conveyor
    13. 13. Equatorial to polar heat transport and water flow
    14. 14. Ocean – Atmosphere Circulation
    15. 15. UNEQUAL HEATING OF EARTH BUT – Outgoing solar radiation is not as uneven

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