Heatflow from the Earth's interior in the Polar Regions is poorly known and there is an urgent need to improve understanding of its rates and distribution. It can provide information about large-scale crustal structure and geological processes, ice sheet stability and response to climate change, distribution of basal ice melting, the development of sub-ice hydrology, subglacial lakes, and enhanced glacial flow in ice streams, areas likely to preserve old ice suitable for coring to push ice core records back in time, and stability of methane hydrates. Thermal gradient measurements can provide climatic information. This session will introduce posters on direct measurement and indirect estimates of heatflow in the Polar Regions.