Sensors to Make Sense of the Sea : Image

A variety of sensors on ocean observatories provide running data logs on changing conditions in the sea

OBSERVING THE SEA FROM SHORE—A variety of sensors on ocean observatories provide running data logs on changing conditions in the sea. At left, temperature and salinity data from the seafloor to the surface off Martha?s Vineyard over three weeks (day 274 to 296), collected by the Autonomous Vertically Profiling Plankton Observatory (AVPPO), show distinct water layers at the start that become less distinct. (Saltier and warmer waters are red; colder, fresher waters are blue.) At right, a video plankton recorder on the AVPPO captures images of tiny planktonic animals called copepods, while compiling a record of copepod abundance over three weeks (middle). The data shows that during a passing storm (days 277 and 278), the copepod population swam down to keep away from surface waves. (Image generated by Scott Gallager, WHOI)

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