Beaufort Gyre Exploration Project | Cruise

By Kris Newhall

Moving Mountains
The Louis St. Laurent (LSL) has been making very good time and speed since the science team boarded, traveling a total of 550 nautical miles at an average speed of 15 knots. However, now that the ship has reached 71 deg. 46.64’ N, 131 deg. 53.19’ W we’ve come to respect what the Arctic is all about. The main ice pack is all around and it is breathtaking to see and hear the LSL slowly crack and break it. About 90% of the ice is below the water‘s surface, and to finally see it up close puts the enormous mass into perspective. Trying to make it through pressure ridges that have formed is simply awe-inspiring. According to Andrew Hamilton, an IOS science team member, “in a way it’s like moving mountains.”

When there was a sufficient amount of open water there was a CTD (conductivity, temperature, depth) cast at a depth of 500 meters. After the cast was completed, there were scientists buzzing all around with excitement taking samples from all of the water sampling bottles for processing. Amanda Byrd, from the University of Alaska, Fairbanks, also performed a plankton tow where she hung her bongo nets from the A-Frame on the starboard side of the ship. There has to be constant communication between the bridge and the scientists on deck in order to keep everything away from the three large propellers. She’s studying the zooplankton communities at less than 100 meters including: arrow worms, krill, copepods, and amphipods.

The next day there was a meeting with Captain Andrew McNeill and Chief Officer John Jenner to discuss the logistics of the mooring operations. The Captain’s only concern was the amount of ice that may be surrounding the mooring sites, but was confident with the experience of John Kemp (WHOI) and the rest of the team. Later that day the LSL drove through the ice to the first of four moorings, the UAF/IARC Canada Basin Observatory (CABOS), and because the top portion of the mooring was 50 feet underwater, a transducer (a type of sonar device) had to be lowered into the water in order to locate its exact position. The LSL had to clear a large area so when the buoy came up it wouldn’t be under a piece of ice and be free of obstructions. After a lengthy ordeal of clearing the ice, the buoy popped up and the mooring was on the ship’s deck in less than two hours.

Currently we are traveling towards the 150 deg. longitude line to the next CTD and mooring sights, but had to slow down to a crawl because of an interesting and exciting encounter; a polar bear was sighted swimming off of the ship’s port bow. It looked to be a juvenile, but is still considered to be very dangerous. Later on a mother and cub were also spotted on top of an extraordinary ice block.