[1] Lund Univ, Dept Phys Geog & Ecosyst Anal, SE-22362 Lund, Sweden
[2] Trent Univ, Dept Geog, Peterborough, ON K9J 7B8, Canada
[3] McGill Univ, Dept Geog, Montreal, PQ H3A 2K6, Canada
[4] Finnish Meteorol Inst, FIN-00101 Helsinki, Finland
[5] Poznan Univ Life Sci, Dept Agrometeorol, PL-60649 Poznan, Poland
[6] Univ Lethbridge, Dept Biol Sci, Lethbridge, AB T1K 3M4, Canada
[7] Carleton Univ, Dept Geog & Environm Studies, Ottawa, ON K1S 5B6, Canada
[8] San Diego State Univ, Dept Biol, Global Change Res Grp, San Diego, CA 92182 USA
[9] Univ Helsinki, Dept Phys Sci, FIN-00014 Helsinki, Finland
[10] Swedish Univ Agr Sci, Dept Forest Ecol & Management, SE-90183 Umea, Sweden