Ben G Kopec¹, Falk Pätzold², Astrid Lampert², Valtteri Hyöky³, Sonja Murto⁴, Eric S Klein⁵, Leif Eriksson⁶, Michael K H Tjernstrom⁴, Paul Zieger⁷ and Jeffrey M Welker⁸, (1)Michigan Technological University, Great Lakes Research Center, Houghton, MI, United States, (2)Technische Universität Braunschweig, Institute of Flight Guidance, Braunschweig, Germany, (3)University of Oulu, Ecology and Genetics Research Unit, Oulu, Finland, (4)Stockholm University, Department of Meteorology, Stockholm, Sweden, (5)University of Alaska Anchorage, Geological Sciences, Anchorage, United States, (6)Chalmers University of Technology, Geoscience and Remote Sensing, Space, Earth and Environment, Gothenburg, Sweden, (7)Stockholm University, Department of Environmental Sciences, Stockholm, Sweden, (8)University of Alaska Anchorage, Department of Biological Sciences, Anchorage, United States