Albedo

Albedo er en måling af jordens overflade reflektivitet, det fortæller, hvor meget sollys (energi), der bliver reflekteret tilbage til rummet. Albedo har en nedkølende effekt. Den afhænger mest af farven på overfladen (mørke overfladefarver absorberer mere energi end lyse overfladefarver). Forskere fra Universitetet i Californien, San Diego, har analyseret arktisk satellitdata fra 1979 til 2011, og har fundet ud af at den gennemsnitlige arktiske albedo niveau siden 1979 er faldet fra 52 procent til 48 procent på grund af tilbagegangen af arktisk havis.

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