A frost day is a day when the minimum air temperature, measured at a height of 1.50 meters, is below 0°C. The number of days with frost on the ground is generally higher than the number of frost days. If the maximum temperature of a day is also below 0°C, it is called a day without thaw. The number of frost days provides information about the severity of the winter, and is decisive for the duration of the winter sports season or the energy requirements of the heating period.
NILS RIACH, NICOLAS SCHOLZE, RÜDIGER GLASER, SOPHIE ROY & BORIS STERN
Physische Geographie, Universität Freiburg i. Br.
Météo-France, Illkirch
GeoRhena, Département du Haut-Rhin, Colmar
The present dossier consists of 4 maps on climate change in the tri-national Upper Rhine region and an accompanying text. The package contains 2 maps on the development of the number of frost days in the near future (2021-2050) and 2 maps for the distant future (2071-2100). For each of the two time horizons, two maps are also available: one map for a moderate climate change scenario (RCP4.5) and one map for the strong scenario (RCP8.5).
The full text of the report is available below in French and German.
