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Oceans

Oceans. Oceans cover 70% of the planet’s surface. Ocean circulation. Currents. Ocean circulation. Surface currents. Clockwise in northern hemisphere. Ocean circulation. currents. Ocean circulation. Currents Oceans are a gigantic heat sink. currents. Oceans. Weather generator.

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Oceans

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  1. Oceans

  2. Oceans cover 70% of the planet’s surface

  3. Ocean circulation • Currents

  4. Ocean circulation Surface currents Clockwise in northern hemisphere

  5. Ocean circulation • currents

  6. Ocean circulation • Currents • Oceans are a gigantic heat sink

  7. currents

  8. Oceans • Weather generator

  9. El Nino

  10. El Nino

  11. ENSO ~ • El Nino/Southern Oscillation

  12. ENSO

  13. ENSO

  14. Oceans • Weather generator • We are far from understanding how the oceans create our climate • NOAA National Oceanic and Atmospheric Administration

  15. Antarctica The Madrid Protocol , 1990 a natural reserve dedicated to peace and society

  16. Antarctica

  17. Antarctica

  18. Antarctica West Antarctica rests on deep bedrock If it detaches, sea level will rise 5 - 6 meters

  19. Antarctica • Ice Cap built up over 100,000 years from snowfall slow moving ice “rivers”

  20. Antarctica • Sea-ice sea freezes in winter melts back in summer and breaks up into pack-ice

  21. Antarctica • Pack-ice reflects 80% of sunlight keeping Antarctica cold

  22. Oceans • Weather generator • Transport surface : Voyages

  23. Ancient Seafarers

  24. Ancient Seafarers • Austronesian mariners

  25. Ancient Seafarers

  26. Ancient Seafarers • Austronesian mariners

  27. Oceans The Kon-Tiki Expedition Thor Heyerdahl

  28. Heyerdahl has seen the pollution of the oceans up close tar

  29. Heyerdahl has seen the pollution of the oceans up close tar plastics

  30. Oceans Jaques Cousteau

  31. Oceans • Both Cousteau & Heyerdahl became ardent environmentalists • “The oceans are ill”

  32. Oceans • e.g. abalone

  33. Oceans • e.g. abalone

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