Data from: Peatland development reconstruction and complex biological responses to permafrost thawing in Western Siberia

Datasets from two peat cores collected in 2019 in Western Siberia near Khanymei (Yamal-Nenets Autonomous District): Kh-K1 – located at the lake edge (63.7856° N, 75.6438° E) and Kh-K2 – located on a peat plateau (63.7855° N, 75.6434° E). The dataset includes information on peat accumulation, carbon accumulation, organic matter content, bulk density, testate amoebae, plant macrofossils, pollen, non-pollen palynomorphs, and micro- and macrocharcoal, as well as radiocarbon dates.