Arctic polygonal tundra (IMAGE) DOE/Oak Ridge National Laboratory Caption ORNL scientists created a high-performance simulation of the Arctic tundra that found the process of soil subsidence due to permafrost thaw would be self-limited in the decades ahead. Credit David Graham, ORNL/U.S. Dept. of Energy Usage Restrictions Use photo credit. License Original 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.