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Jeff O'Brien installs an Upward Looking Sonar device onto a flotation sphere.

Jeff O'Brien installs an Upward Looking Sonar device onto a flotation sphere.
Jeff O'Brien installs an Upward Looking Sonar device onto a flotation sphere.
Jeff O'Brien installs an Upward Looking Sonar device onto a flotation sphere.
Jeff O'Brien installs an Upward Looking Sonar device onto a flotation sphere.
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Krishfield, Richard
Jeff O'Brien installs an Upward Looking Sonar device onto a flotation sphere.
Still Image
10/12/2015
graphics/Krishfield/DSCN1903.JPG
An Upward Looking Sonar device is used to measure ice draft (portion of ice below sea level) into the top flotation sphere of a mooring in preparation for deployment for a 13th year of observations by the Beaufort Gyre Observing System. Also included on the sphere is a wave measuring device, and acoustic doppler current profiler to measure the upper ocean and sea ice velocities.
Image Of the Day caption:
WHOI engineer Jeff OBrien attaches an upward looking sonar (ULS) onto a mooring to prepare it for deployment earlier in 2015 as part of the thirteenth year of observations of sea ice by the Beaufort Gyre Observing System. In addition to the ULS, which measures the portion of ice below the sea surfacel, an acoustic doppler current profiler (ADCP) measures the velocity of moving ice. The interplay between ocean, ice, and atmosphere plays a pivotal role in maintaining the balance of Earths climate. Follow the Beaufort Gyre Exploration Projects progress in studying how climate change may tip the balance in the arctic.
Photo by Rick Krishfield
© Woods Hole Oceanographic Institution
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