Montreal Gazette: With the looming collapse of the 14,500-square-kilometre Wilkins Ice Shelf, attention is being focused on the Antarctic Peninsula — the region experiencing the most rapid climate change in the world. Over the past 50 years, the average annual temperature there has risen a staggering 2.5 degrees C and the peninsula’s many ice shelves and glaciers are calving more icebergs than ever. To get a better look at this threatened wilderness, 15 crew and 40 sail trainees recently joined …