Soeren Ludvigsen is a farm worker in southern Greenland. He’s holding a potato that he harvested there in 2004. Thanks to global warming, crops like potatoes and broccoli now grow in regions where even just a decade ago they never would have made it through the frost.

Thirty years ago in the city of Qaqortoq, for example, the average temperature was 0.63 degrees Celsius. Today it’s about 1.93 degrees. That might not seem like a huge change, but it adds two extra weeks to their growing season. And with 20 hours of sunlight in each summer day, that means that global warming has given Greenland a veritable agricultural boom.

And the Arctic’s warming is only getting faster, according to research released by Danish scientists on Wednesday. They were studying Greenland ice streams—sections of ice that move quickly within the larger ice sheet, usually toward an ocean. As Dorthe Dahl-Jensen of the Niels Bohr Institute in Copenhagen explained:

“In just two-three years the speed of a large ice stream nearly doubled. This means that we have underestimated the rapid changes that may ensue from the amounts of ice leaving the ice each year.”

This and other new findings about Arctic climate change were discussed this week at the “Global Environmental Change” conference in Nynäshamn, Sweden.

Go check out the rest of National Geographic’s amazing photos of climate change.