John Yackel, University of Calgary (IMAGE) University of Calgary Caption Geography professor John Yackel says this year’s extreme melt in the Arctic could have serious ramifications for the planet. Credit Photo courtesy of John Yackel Usage Restrictions Credit required License Licensed content 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.