Tonight on the ship, they are sorting the samples collected with the plankton nets, which catch smaller organisms that may not be visible on the video. Back at MBARI, the Robison lab will analyze the video to identify and count species and features that were encountered. 2 3 Smaller chunks of floating glacially-derived ice are called 'growlers' or 'bergy bits'. Today’s transects included both a video record and a plankton net tow for each. An iceberg in the Arctic Ocean Icebergs in Greenland as filmed by NASA in 2015 An iceberg is a piece of freshwater ice more than 15 m long 1 that has broken off a glacier or an ice shelf and is floating freely in open (salt) water.
During a transect, the ROV is maneuvered forward over a given distance-in this case, a diagonal line from the depth of the bottom of the iceberg to the surface-and observations are recorded. However given the shape and size of an iceberg, as little as 10 can be above water at times, so it can be between one tenth. One major accomplishment was the completion of vertical transects at the face of the iceberg and two distances away from it. 79 of an iceberg is underwater, so 21 or about one fifth is above it. Although the tether handlers on deck had to cope with falling snow as they reeled the ROV’s lifeline in and out, the vehicle experienced favorable diving conditions and water clarity. The ROV, configured with biological sampling devices for the Robison lab, spent nearly three hours in the waters around the iceberg. Today the ROV IceCUBE successfully completed its final dive of the expedition, exploring a two-kilometer-long tabular iceberg.
#ICEBERG UNDERWATER PROFESSIONAL#
Stripes on the iceberg indicate land-derived materials incorporated into the iceberg. Browse 550 professional icebergs underwater stock photos available royalty-free. The nozzle in the foreground was used to collect water samples with the ROV that were pumped back to the ship via tubing that was attached to the vehicle’s tether. Physical oceanography and climate changeĬaves and ledges imaged by ROV IceCUBE during a dive underneath a iceberg in the Weddell Sea.
Bioluminescence: Living light in the deep sea.
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