Just a reminder, that’s 7 metres of sea level rise if the Greenland ice sheet goes. The Petermann glacier is actually floating ice, but loss of these ice barriers allows the main on-land glaciers and the ice shelf itself to increase their outflow rates into the ocean.
“As we see this phenomenon occurring further and further north — and Petermann is as far north as you can get — it certainly adds to the concern,” said Waleed Abdalati, director of the Center for the Study of Earth from Space at the University of Colorado.
…scientists note that it fits with the trend of melting glacial ice they first saw in the southern part of the massive island and seems to be marching north with time. Big cracks and breakaway pieces are foreboding signs of what’s ahead.