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Development of the upper timberline 1960 - 2099 (model; FOEN)

This map shows the natural upper timberline (excluding anthropogenic influences and without considering shrub forest) modelled for the periods 1961–1990, 1981–2010 and 2070–2099.

14.10.2022 | www.geo.admin.ch

ch.bafu.wald-obere_waldgrenze

 

Link to the map: map.geo.admin.ch

The following representative concentration pathways (RCPs) and model combinations were used to model the future timberline: 

  • RCP 2.6 (Paris Agreement compliance scenario), with the model combination DMI_HIRHAM_ECEARTH_EUR11 as the projection for slight climate change,
  • RCP 4.5 (limited mitigation scenario), with the model combination SMHI-RCA_MPIESM_EUR44 as the projection for moderate climate change,
  • RCP 8.5 (no mitigation scenario) with the model combination CLMCOM-CCLM5_HADGEM_EUR44 as the projection for strong climate change.

The position of the upper timberline according to the digital height model (DHM25) is a function of the mean daily temperature high in July, the mean July precipitation, the mean snow-free period, the exposure, the slope and the bedrock.


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geo.admin.ch

c/o
Federal Office of Topography swisstopo
COGIS (Coordination, Geo-Information and Services)
Seftigenstrasse 264
P.O. Box
3084 Wabern