Arctic winds play a significant role in sea ice events.
Pressure ridges form huge piles of sea ice along the Chukchi Coast.
Landsat image of Bering Straight ice blockage. This image was taken as part of the helicopter reconnaissance conducted on March 8, 2000. Our project grew out of having to cope with the problem that different types of sea ice observers have increasingly been prevented from communicating and working together by the very nature of their separate technological specializations. Five anomalous events and conditions from the second half of the 20 th century are to be chronicled and illustrated. Climate changes now being experienced in the Western Arctic are regarded as portents of increasingly frequent disruptions in sea ice dynamics.