'It's a very loud booming sound that echoes across the fjord from one side to the other as different pieces of ice start to break off. It's just this incredible loud sound,' says Denise Holland, logistics coordinator for NYU's Environmental Fluid Dynamics Laboratory and NYU Abu Dhabi's Center for Global Sea Level Change. 'It's like a billion ice cubes at once,' David Holland says. 'It's that kind of cracking sound.' It's events like this — considered a significant glacier loss — that deeply concern glaciologists and climatologists about the consequences to global sea levels. This video may assist scientists in making predictions.