Arctic amplification refers to the greater rate of climate warming in the Arctic region than the rest of the world. The amount of land in the Northern Hemisphere allows for greater annual variation of snow cover. This fact allows for greater cooling and warming potentials when the overall climate forcing is altered. Less forcing would result in a cooling trend that would allow more snow cover and therefore a polar de-amplification effect in relation to the average temperature of the rest of the globe. More forcing, as is what happens under the influence of higher concentrations of greenhouse gases, allows for a more rapid decrease in snow and ice cover. The decrease of melting of snow and ice reduces the albedo reflectance of the poles therefore amplifying the temperature in the polar region.
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