Coring Sunday Lake (IMAGE) University of Arizona Caption Researchers secure a floating platform used to take sediment cores from Sunday Lake in southwestern Alaska. Sediment generated by the small cirque glacier is carried to the lake by meltwater. The amount of sediment delivered to the lake can vary with the intensity of the summer melt season. Credit Darrell Kaufman, Northern Arizona University Usage Restrictions This photo may only be used to illustrate a story about the research described in the accompanying news release, "Recent Arctic Warming Reverses Millennia-long Cooling Trend." Please make sure to credit the photo as requested. Do not post this photo independent of the story. 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.