Heavy methane emissions from Swedish lakes baffle researchers

Locals at Lake Siljan in northern Sweden have told of persistent winter ice holes that often occur in the same place year after year. Now, researchers from Chalmers University of Technology, Sweden, have examined the area with a completely new measurement method and discovered unexpectedly strong methane emissions from several places on the lakes in the area – which is the cause of the holes in the ice. Credit: Photo: Mats Budh.