Air temperature (°C) Soil temperature (°C) -5cm Total precipitation (mm)JuneAugust 1998 10.2 8.2 148.2JuneAugust 1999 9.5 7.5 174.7JuneAugust (5 year mean) 9.7 8.6 107.1October 1998September 1999 -1.3 1.2 337.7October 1999September 2000 0.6 2.4 423.9OctoberSeptember (5 year mean) -0.7 2.0 294.5Notes: The mean values for these parameters over the five years previous to the start of the experiment are given for comparison. Source: Abisko Scientific Research Station (Abisko, Sweden).