Toronto Star: For our understanding of the Arctic environment and its fate as the climate changes, one relationship is more important than all the others being studied by scientists aboard the Amundsen, a Canadian Coast Guard icebreaker converted into a floating polar research base. It’s not the complex chemical exchanges between air, snow, ice and water. Not the intricate biology and zoological web which connects plankton to polar bears. Not even the powerful physical forces which power tides and …