"Positive albedo" refers to an object or surface that reflects a lot of light and heat back into space instead of absorbing it. This is usually a desirable quality because it helps to cool down the environment. Full definition
bozzza - The differences in the Arctic are perhaps 1/4 the ocean thermal mass as global ocean averages, small overall size (the smallest ocean), being almost surrounded by land (which warms faster), more limited liquid interchanges due to bottlenecking than the Antarctic, and very importantly considerable susceptibility to positive albedo feedbacks; as less summer ice is present given current trends, solar energy absorbed by the Arctic ocean goes up very rapidly. (skepticalscience.com)
«One can ask: why the polar amplification of warming does not occur in the Southern Hemisphere, despite the existence of extensive sea ice which has a positive albedo feedback? (skepticalscience.com)
Interesting, now you believe in the positive albedo effect. (wattsupwiththat.com)