Another positive feedback of global warming is the albedo effect: less white summer ice means more dark open water, which absorbs more heat from the sun. (newscientist.com)
Because ice reflects most light and heat back into space, the exposed water will absorb more heat as sea ice melts, and further add to the warming. (nytimes.com)
Because these black particles absorb more heat than white snow, the study of black carbon concentrations in glaciers is important for predicting future melt rates. (sciencedaily.com)