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Tools of the Trade

Tools of the Trade. Or What do we use to study the marine world?. Physical Properties. Secchi Disk measures turbidity/visibility turbidity - cloudiness due to the amount of suspended matter in the water (soil, sediments, sewage, and plankton) Clear - low turbidity Cloudy - high turbidity.

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Tools of the Trade

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  1. Tools of the Trade Or What do we use to study the marine world?

  2. Physical Properties • Secchi Disk • measures turbidity/visibility • turbidity - cloudiness due to the amount of suspended matter in the water (soil, sediments, sewage, and plankton) • Clear - low turbidity • Cloudy - high turbidity

  3. Biological Properties • Dip Net • retrieves a variety of samples from the water

  4. Physical Properties • Hydrometer • measures density & temperature, used to find salinity HYDROMETER

  5. Physical Properties • Niskin / Nansen Bottle • obtains water samples at a variety of depths NISKIN BOTTLE

  6. Biological Properties • Sediment Screen • used to screen sediments for macro invertebrates

  7. Physical Properties • Shipek/Peterson Grab • take a sample of the ocean bottoms

  8. Physical Properties • CTD • measures conductivity, temperature & depth

  9. GPS • Provide radio-navigation system giving every place on Earth an address

  10. Biological Properties • Plankton Net • net towed or dipped to gather plankton samples

  11. Research Vessels ALVIN • Research submersible • Can carry passengers • Reach depths of 14,764 ft. • Maneuverable arms, 3 portholes

  12. Physical Properties • Thermometer • measures & records temperature at a particular depth

  13. Research Vessels • Trieste – first bathyscaphe to descend 35,600 ft to the bottom of the Mariana Trench

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