The icefields of Patagonia, located at the southern end of South America, are the largest masses of ice in the temperate Southern Hemisphere (approximately 55,000 square kilometers).
Where once two streams of ice merged in Greenland’s Jakobshavn Glacier, today there is division and a complex surface riddled with crevasses and melt ponds.
A peek under the ice reveals a Grand Canyon-sized channel under the Jakobshavn glacier—one reason why the Greenland glacier contributes more to sea level rise than any other single feature in the Northern Hemisphere.
The amount of ice flowing from the Antarctic glacier has doubled in the span of three decades, and scientists think it could undergo even more dramatic changes in the near future.
Three polynyas—circular areas free of sea ice—provide tantalizing clues as to why Antarctica’s Pine Island Glacier is melting at an astonishing 100 meters per year.