The oceanic environment
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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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Statistics for the earth s water supply
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
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



Oceanic statistics
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)





Tides
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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