Locations of the Arctic sites (IMAGE) Research Organization of Information and Systems Caption Map showing the locations of Barrow, Alaska; Alert, Canada; Ny-Ålesund, Spitsbergen Island; and Pallas, Finland, where comparative observations of black carbon were made. Credit © Sho Ohata (Nagoya Univ.) Usage Restrictions News organizations may use this image, with proper attribution, as part of news coverage of this paper only. 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.