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The Oceanic Environment

The Oceanic Environment. Statistics for the earth's water supply:. Oceans 97.61%  Polar Ice & Glaciers 2.08  Groundwater 0.29  Freshwater lakes 0.009  Saline Lakes 0.008  Soil Moisture 0.005  Rivers 0.00009  Atmosphere  0.0009. Physical Characteristics of Water:.

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The Oceanic Environment

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  1. The Oceanic Environment

  2. Statistics for the earth's water supply: • Oceans 97.61% •  Polar Ice & Glaciers 2.08 •  Groundwater 0.29 •  Freshwater lakes 0.009 •  Saline Lakes 0.008 •  Soil Moisture 0.005 •  Rivers 0.00009 •  Atmosphere  0.0009

  3. Physical Characteristics of Water: • liquid at ambient temperature • solid state less dense than liquid- max density 4o C; ice floats, prevents freezing entire water column • high heat capacity- absorbs heat; stabilizes temperatures within geographic regions • polar solvent- "like dissolves like“ • transparent- absorbs IR & UV

  4. Polarity

  5. Oceanic Statistics • Oceans covers ~ 71% of the earth’s surface • Ave. depth is 4,000 m • > 84% is more than 2,000 m • Deepest ~ 11,000 m (> 6 miles)

  6. Continental Shelf

  7. Coastal Upwelling

  8. Thermocline

  9. Tides • Largely determined by gravitational attraction on either side of the earth • Tidal Periodicity • Semidiurnal • Diurnal • Mixed • Other factors- basin shape & Coriolis effect

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