thermo_picno_halocline

thermo_picno_halocline - Ocean Pr oper ties Ocean Pr oper...

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Unformatted text preview: Ocean Pr oper ties Ocean Pr oper ties Ocean Concepts Ocean Concepts Buoyancy Temperature Light Density Pressure Depth Sound Buoyancy Archimedes Principle of Buoyancy A floating object displaces a volume of fluid equal in mass to the floating object empty loaded with fish Displaced water Objects that are more dense than water will sink. Objects that are less dense than water will float. Objects that are the same density as water will neither sink nor float. float Neutrally buoyant sink Blubber Swim bladder Pneumatophore Organisms adaptation to buoyancy in water Air chambers Large liver & heterocercal tail Buoyancy Compensator Device (BCD) Organisms adaptation to buoyancy in water Temperature Isotherms Isotherms Lines of equal temperature 60 o 30 o o 30 o 60 o polar polar temperate tropic temperate Sea Surface Temperature Sea Surface Temperature Oct. 2010 Sea Surface Temperature Sea Surface Temperature Sea Surface Temperature Sea Surface Temperature 10-24-10 to 10-27-2010 Properties of Light in the Ocean The Electromagnetic Radiation Spectrum Only green and blue wavelengths pass through water a great distance. Light Absorption in the Ocean Light Intensity decreases with depth 0-100 m (photic zone) 100-1000m (dysphotic zone) >1000 (aphotic zone) Coral Reef Communities Hermatypic corals: possess zooxanthellae are reef builders Light: Clear water Warm temperature: 18-32 o C Low nutrients Low productivity in water Ahermatypic corals: no zooxanthellae rely on tentacular feeding can live in aphotic zone Cauliflower coral ( Pocillopora meandrina ) 6 m 0 m 25 m 13 m Lobe coral ( Porites lobata ) Finger coral ( Porites compressa ) Plate coral ( Porites rus ) High light levels Moderate wave energy Moderate light levels Occasional storm wave energy Low light levels Low wave energy Very low light, Primarily downwelling No wave energy Water color and life in the ocean Ocean color is influenced by: The amount of turbidity from runoff The amount of photosynthetic pigment, which...
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thermo_picno_halocline - Ocean Pr oper ties Ocean Pr oper...

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