01 - - Organisms are re-circulated via wind-driven vertical...

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10/01 Why is there water in the ocean? Hydrologic Cycle + Precipitation + Run-off - Evaporation Continents: Precipitation > Evaporation Ocean: Evaporation > Precipitation Physical Differences Between Marin and Terrestrial Systems 1) Water is 850x denser, 60x more viscous than air - Changes in Buoyancy - Entire Ecosystems supported in water column - Filter Feeding ex. whales - Changes in Propulsion 2) Takes lots of energy to convert water -> ice -> water -> vapor - Acts as an energy absorption (temp) buffer 3) Surface tension at air-water interface traps particles - Entraps flotsam(wreckage), including pollutants -> unintentionally trapped in surface water 4) Water is denser than ice - Denser as it cools - Less dense as a solid (freezes) - Most substances are more dense as solid - Allows animals to live below floating ice - Otherwise, bodies of water would freeze over… 5) Seawater freezes at lower temperature than freshwater - Ex. swimming in really cold seawater 6) Ocean-Atmosphere interactions drive many current systems
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Unformatted text preview: - Organisms are re-circulated via wind-driven vertical mixing (Ekman Transport)- Many organisms migrate/ are dispersed by currents- Causes upwelling from Earths rotation and winds 7) Light attenuates in water (70 meters max in clear water).- Most of Ocean is dark- Life concentrated at surface- Senses other than vision are important- Dark ~ Cold (no isolation), average ocean temp = 4C 8) Sound travels 4x faster & 1000x further in water 9) Air is more electrically resistive than water- Electro-sensory systems 10) Nutrient inputs are primarily from land- biomass concentrates on coasts lots of light & &nutrients Coastal areas = Productive nursery areas Ex. salt marshes, kelp forests, and mangroves 11) Ocean has invisible, but real boundaries, separated by:- Light- Salt- Temperature- Currents 12) The Ocean is a chemical sink- Salts from land accumulate in the ocean- Ocean absorbs CO2 from the atmosphere...
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This note was uploaded on 04/19/2008 for the course OCEAN 250 taught by Professor Dr.clairehorner-devine during the Fall '08 term at University of Washington.

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01 - - Organisms are re-circulated via wind-driven vertical...

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