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Ocean Circulation

Ocean Circulation. Review general circulation in the atmosphere. Review. Draw a diagram illustrating the vertical circulation of air in the atmosphere. Include : Direction of air movement between the following latitudes (0-30 o , 30-60 o , 60-90 o )

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Ocean Circulation

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  1. Ocean Circulation

  2. Reviewgeneral circulation in the atmosphere Geog 096: Weather, Climate and Landscapes

  3. Review Draw a diagram illustrating the vertical circulation of air in the atmosphere • Include: • Direction of air movement between the following latitudes (0-30o, 30-60o, 60-90o) • Location of high (H) and low (L) pressure conditions • Location of Hadley cells • If time allows: • Include location of easterly (trade) winds and westerly winds in the latitudinal zones given above Geog 096: Weather, Climate and Landscapes

  4. Average Annual Precipitation Image source: Christopherson, 2001 Elemental Geosystems. John Wiley & Sons Geog 096: Weather, Climate and Landscapes

  5. Ocean Circulation Two dimensions (as in the atmosphere) • Surface currents (gyres) • Vertical currents (upwelling, downwelling) Geog 096: Weather, Climate and Landscapes

  6. Ocean circulation – surface currents “gyres” Geog 096: Weather, Climate and Landscapes Arbogast, Fig 6.28

  7. Ocean circulation – surface currents Geog 096: Weather, Climate and Landscapes Arbogast, Fig 6.28

  8. Average Annual Precipitation Image source: Christopherson, 2001 Elemental Geosystems. John Wiley & Sons Geog 096: Weather, Climate and Landscapes

  9. Ocean circulation – vertical patterns Geog 096: Weather, Climate and Landscapes Arbogast, Fig 6.30

  10. Ocean circulation – vertical patterns thermohaline circulation Geog 096: Weather, Climate and Landscapes Image source: Christopherson, 2001. Elemental Geosystems. John Wiley & Sons

  11. All of the following locations are characterized by abundant precipitation except • Areas located in the equatorial region • Areas located in the polar regions • Areas located at 60o N • Areas along the east coasts of continents Geog 096: Weather, Climate and Landscapes

  12. Average Annual Precipitation Image source: Christopherson, 2001 Elemental Geosystems. John Wiley & Sons Geog 096: Weather, Climate and Landscapes

  13. Coupling of the oceans & atmosphere Teleconnections: recurring and persistent, large-scale pattern of pressure and circulation anomalies that spans vast geographical areas . Geog 096: Weather, Climate and Landscapes

  14. L Geog 096: Weather, Climate and Landscapes

  15. Pacific Ocean Circulation Image source: http://www.sbg.ac.at/ipk/avstudio/pierofun/atmo/elnino.htm Geog 096: Weather, Climate and Landscapes

  16. Pacific Ocean Circulation anomoly Geog 096: Weather, Climate and Landscapes

  17. El Niño Arbogast, Fig 6.31 Geog 096: Weather, Climate and Landscapes

  18. El Niño effects • Reduction in cold water upwelling off of the Peruvian coast • Reversal of the equatorial trade winds • Dry conditions over northern Australia, western Pacific • Wet conditions over northwestern So. America and southwestern U.S. • Widespread flooding, drought, famine Geog 096: Weather, Climate and Landscapes

  19. Midterm Exam • During class period, Thursday 2/28 • Covers weeks 1-7 (Chapters 1-7, 9 pgs 249-59) • Review session tonight (Tuesday 2/26) 7:30-9:00pm, L207 • We’re available during office hours for help! Geog 096: Weather, Climate and Landscapes

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