Study Area Map (image) University of Washington Share Print E-Mail Caption The striped area on the left shows the Chukchi Sea polar bear subpopulation's range. Sea ice reaches south to the dotted line in winter, and retreats to the solid black line in summer. The right shows a closeup of the study area off Alaska's coast. White circles show where polar bears were tagged between 2008 and 2016. Credit Regehr et al./Scientific Reports Usage Restrictions With credit Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.