Or What do we use to study the marine world?. Physical Properties Secchi Disk measures...
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Transcript of Or What do we use to study the marine world?. Physical Properties Secchi Disk measures...
Or What do we use to study the marine world?
Physical PropertiesSecchi Disk
measures turbidity/visibility
turbidity - cloudiness due to the amount of suspended matter in the water (soil, sediments, sewage, and plankton)Clear - low turbidityCloudy - high turbidity
Biological PropertiesDip Net
retrieves a variety of samples from the water
Physical PropertiesHydrometer measures density & temperature, used to find salinity
HYDROMETER
Physical PropertiesNiskin / Nansen Bottle
obtains water samples at a variety of depths
NISKIN BOTTLE
Biological PropertiesSediment Screen
used to screen sediments for macro invertebrates
Physical PropertiesShipek/Peterson Grab
take a sample of the ocean bottoms
Physical Properties
CTD measures
conductivity, temperature & depth
GPSProvide radio-
navigation system giving every place on Earth an address
Biological PropertiesPlankton Net
net towed or dipped to gather plankton samples
Research VesselsResearch
submersibleCan carry
passengersReach depths
of 14,764 ft.Maneuverable
arms, 3 portholes
ALVIN
Physical PropertiesThermometer
measures & records temperature at a particular depth
Research VesselsTrieste – first bathyscaphe to
descend 35,600 ft to the bottom of the Mariana Trench