Clearly, most information on ivory gulls came from observations made when gulls were either in migration or feeding away from nesting colonies, near pack ice or the floe edge, but we did record information on one colony.
They hauled the lifeboats across the ice for the next four days and stopped on a floe of ice which they christened Ocean Camp.
Measurements by other researchers at Arctic sites further inland show less mercury pollution, indicating that the heavy fallout may be restricted to the near-coastal environment and parcels of open ocean where floes of annual ice melt.
From February to June, large floes and landfast ice predominated, whereas small floes formed the major cover from August to December.
There was no complete break in the recorded tracks of individual floes .
The ship moved through the pack ice, elbowing floes out of the way as if they were unwanted thoughts.
Floes of any size can be found at all distances from the ice pack edge, including vast ([less than] 2 km) floes near the ice pack edge and much smaller floes in the central ice pack.
These rotations further suggest that forces acting on the nearshore edges of large floes behave differently from those acting on offshore edges.
This autumn he will be setting off on an historic visit to the Antarctic, spending 50 days on board a ship anchored to a drifting ice floe in the Weddell Sea.
Locally, these floes are also known as the Permanent Polar Pack Ice.