NAU Arctic Study at Cascade Lake (IMAGE) Northern Arizona University Caption Researchers are examining the sediment from lakes such as Cascade Lake in southwestern Alaska to determine changes in climate through the amount of glacier melting as reflected in the amount of sediment accumulated in the lake each year. Credit Darrell Kaufman, Northern Arizona University Usage Restrictions Photo must be accompanied by above caption and credit. 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.