Picture of the Day for 5 September 2002

Deep Drilling


Today was a busy work day for all of the groups. The morning started early with a CTD cast down 300m (1000 feet) into the ocean. We then pulled up to a new ice floe. This new floe is older and thicker with lots of snow cover. While the divers performed 2 dives (in search of Krill), the ice team enlisted seal team members to help with two 25-meter transects across the ice floe. On each transect we shoveled a hole in the snow at 1 meter increments to determine snow depth, then drilled through the ice at each shoveled hole to determine ice thickness. Snow depth along the lines averaged 82 cm (33 inches) of snow. Our greatest snow depth was 140 cm (55 inches). Ice thickness along the lines averaged 2.59 m (8.5 feet), with the greatest ice thickness measured being 5.65 m (18.5 feet).


Today's picture shows Pete Hartsough lowering the 2-inch drill to finish drilling an ice hole that is over 5 meters (16 feet) deep. (Notice how the drill towers over Pete's head.)


While the ice and seal teams were working on the transect, three seals hauled out on a nearby ice floe. When diving and ice transecting were finished, the ship maneuvered so that the seal team could reach this floe. The seal team then caught and worked on (studied) one of the seals.