Keywords: Abrupt Climate Changes and Environmental Responses; Accumulation model; ACER; Aconitum; Alnus incana; Alnus viridis; Amaranthaceae/Chenopodiaceae; Ambrosia; Andromeda; Androsace; Apiaceae; Arctostaphylos uva-ursi; Artemisia; Asteraceae; Astragalus; Betula; Botrychium; Brassicaceae; Bupleurum; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; Caryophyllaceae; Cassiope; Classical age-modeling approach, CLAM (Blaauw, 2010); Cnidium; Counting, palynology; Cyperaceae; Cystopteris; DEPTH, sediment/rock; Dodecatheon; Douglasia; Dryas; Empetrum; Epilobium; Equisetum; Ericaceae; Ericales; Fabaceae; Galium; Gentiana; Geum; Hanging_Lake; Hedysarum; Hippuris vulgaris; Huperzia selago; Lagotis glauca; Ledum; Lesquerella; Liliaceae; Linnaea borealis; Lupinus; Lycopodiaceae; Lycopodium annotinum; Lycopodium clavatum; Lycopodium complanatum; Lycopodium obscurum; Mertensia-type; Myrica; Oxyria digyna; Oxytropis; Pedicularis lanceolata; Phlox; Picea; Pinus; Plantago canescens; Plantago major; Poaceae; Polemonium; Pollen indeterminata; Polygonum viviparum; Polypodiaceae; Populus; Potamogeton; Potentilla; Pyrola; Ranunculaceae; Rosaceae; Rubus chamaemorus; Rumex; Salix; Sample ID; Saussurea; Saxifragaceae; Saxifraga cernua; Saxifraga hieracifolia; Saxifraga tricuspidata; Selaginella sibirica; Shepherdia canadensis; Sparganium; Sphagnum; Spiraea; Thalictrum; Tofieldia; Triglochin; Type of age model; Typha latifolia; Unknown; Vaccinium; Valeriana