The American Polar Society – http://www.americanpolar.org/
“The American Polar Society (APS) is the only organization linking scientists, explorers and enthusiasts around the world who value the uniqueness of the polar regions and play critical roles in shaping its destiny. For 75 years, through a journal, The Polar Times, and a series of symposiums, the APS has kept this select community updated on scientific, military, diplomatic, literary, and economic trends and developments in the Arctic and Antarctic. As communications have advanced, the APS now also reports from the field, breaking news and providing inside commentary from leaders and members of scientific exploration parties, government officials, and a network of correspondents.”
Included on its website are many links to many websites related to the polar regions: http://www.americanpolar.org/polar-compendium/polar-resources/