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).
In August 2016, an iceberg heaved away from the Porcupine Glacier in northern British Columbia. It could be the biggest calving event in North America since satellite observations began.
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.