Winter: According to our model results, the mean temperature in the Swedish reindeer grazing areas is going to increase locally by up to 4°C until 2050 compared with the period 1979-2000. The maximum temperatures can cause refreezing events and an ice layer on the snow that keeps reindeer from reaching ground lichens. Documents Winter warming: Change of the mean winter temperature for the years 2020 and 2050. Ice crust forming : Risk for ice crust forming due to maximum daily temperatures close to 0°C for the years 2020 and 2050.