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Images: Measuring Raindrops in the Ocean

This buoy is equipped with an array of seven sensors called ASIMET (for Air-Sea Interaction Meteorology). The sensors measure sunlight, heat, precipitation, humidity, wind speed and direction, barometric pressure, air temperature, sea surface temperature, and salinity. (Photo by Al Plueddemann, Woods Hole Oceanographic Institution)

The buoys are atop moorings that are anchored to the seafloor. Instruments on the mooring line measure temperature, salinity, currents, chemicals and other conditions in the ocean. (Illustration by Jayne Doucette, Woods Hole Oceanographic Institution)

Bob Weller, now chair of the WHOI Physical Oceanography Department, has led a nearly two-decade effort to develop sensor packages that can precisely measure meteorological data in the open ocean. (Photo by Sean Whelan, Woods Hole Oceanographic Institution)

That's not a pot o' gold, but a buoy collecting valuable data on conditions at sea. (Photo by Sebastien Bigorre, Woods Hole Oceanographic Institution)

Members of the WHOI Upper Ocean Processes Group conduct at-sea repairs on an ASIMET buoy in the Gulf Stream that was probably damaged by a ship. (Photo by Patrick Rowe, Woods Hole Oceanographic Institution)