Jasna Pittman, Harvard University (image) Harvard University Caption Jasna Pittman, a research associate in atmospheric sciences at Harvard, examined real-time measurements of various chemical species while flying over Arctic waters in March 2010. "Alaska is incredible, absolutely breathtaking. We were there in the wintertime, so you could see all the mountains covered in snow, beautiful blue skies," Pittman told the Harvard Gazette. "You look out far away, and you see this layer of haze." Credit Photo by Bruce Daube Usage Restrictions None 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.