ScienceDaily: Areas with lowland permafrost are likely to shrink in northern Sweden. Warmer summers and more winter precipitation are two of the reasons. This is shown in a new dissertation from Lund University in Sweden. Permafrost is ground that is frozen year round at least two years in a row. North of the Arctic Circle permafrost is common due to the cold climate. For several years, physical geographer Margareta Johansson at Lund University has studied lowland permafrost in peat mires …