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Arnold Clarke conducting a hydrographic station, shown deploying a Nansen bottle.

Arnold Clarke conducting a hydrographic station, shown deploying a Nansen bottle.
Arnold Clarke conducting a hydrographic station, shown deploying a Nansen bottle.
Arnold Clarke conducting a hydrographic station, shown deploying a Nansen bottle.
Arnold Clarke conducting a hydrographic station, shown deploying a Nansen bottle.
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Arnold Clarke conducting a hydrographic station, shown deploying a Nansen bottle.
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03/01/1962
com/cullen/At Hydro station.jpg
Date is approximate.
Image Of the Day caption:
WHOI technician Arnold Clarke conducts a "hydrographic station" aboard the original WHOI research vessel Atlantis, most likely in the late 1940s. A hydrographic station is a basic operation in oceanography, in which a series of bottles equipped with thermometers are lowered into the ocean to collect temperature data and water samples at various depths. Even today with modern instruments, completing a station takes several hours depending upon the depths to be sampled.
Caption from Down to the Sea for Science, pg. 111:
The five-thousandth Atlantis hydrographic station was recorded in 1960. This photo shows Arnold Clarke making one of those stations. In March 1962, Oceanus magazine gave this description: "A hydrographic station is one of the basic operations in oceanography. to make a station, a series of Nansen bottles with attached thermometers are lowered into the ocean to obtain temperatures and water samples at various depths from surface to bottom. Completing a station takes several hours depending upon the depth to be sampled. Usually two 'casts' are made. One above 2000 meters with close-spaced bottles, and one from 2000 meters to the bottom with more widely-spaced bottles.
Photo courtesy of Woods Hole Oceanographic Institution Archives
© Woods Hole Oceanographic Institution
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