Permafrost temperature and active layer thickness [in "State of the Climate in 2021"]
Noetzli J, Christiansen J, Guglielmin HH, Hrbáček M, Isaksen F, Smith K, Zhao SL & Streletskiy DA
Noetzli, J., Christiansen, J., Guglielmin, H. H., Hrbáček, M., Isaksen, F., Smith, K., … Streletskiy, D. A. (2022). Permafrost temperature and active layer thickness [in "State of the Climate in 2021"]. Bulletin of the American Meteorological Society, 103(8), S41-S43. https://doi.org/10.1175/BAMS-D-22-0092.1