Permafrost Biases Climate Signals in δ18Otree-ring Series from a Sub-Alpine Tree Stand in Val Bever/Switzerland - Grießinger, Jussi; Meier, Wolfgang Jens-Henrik; Bast, Alexander; Debel, Annette; Gärtner-Roer, Isabelle; Gärtner, Holger (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2021)