Yale Environment 360: Plumes of sediment-laden meltwater from southwest Greenlands glaciers are easily recognizable in this NASA satellite image captured in early September. Meltwater at the top of the ice sheet starts out relatively clean, but as it flows through glacial channels down to the ground and out into the ocean, it picks up large amounts of sediment a byproduct of the glacier scraping the bedrock. As a result, plumes, like the ones that appear light-blue in this photograph, are good markers for estimating...