Environmental Science
Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the:
The insulating properties of snow
Release of latent heat to the atmosphere when polar ice melts
Circulation of heat by the atmosphere and oceans
Conduction of heat through the interior of the earth
Concentration of earth's magnetic field lines at the poles
EXAMIANS