(Photo: Julia Boike) Observational data density in the permafrost region is low. At the Samoylov site in the Lena River Delta, Siberia, the mean permafrost temperature was −8 °C, with a zero-amplitude depth [...] layer, temperature down to 26 m in the permafrost. Since the data provide observations of temporally variable parameters that mitigate energy fluxes between permafrost and atmosphere, they are suitable for [...] for use in integrating, calibrating and testing permafrost as a component in earth system models. Science: Prof. Dr. Julia Boike Technique: Niko Bornemann Data and Publications: LTO-Trendviewer LTO-Data