Overduin, P. P., et al. "Submarine Permafrost Map in the Arctic Modeled Using 1‐D Transient Heat Flux (SuPerMAP)." Journal of Geophysical Research: Oceans 124.6 (2019): 3490-3507.
Obu, Jaroslav, et al. "Northern Hemisphere permafrost map based on TTOP modelling for 2000–2016 at 1 km2 scale." Earth-Science Reviews (2019).
*May have a change detection product too (2003 to 2019) released by the ESA CCI group
https://news.grida.no/new-map-shows-extent-of-permafrost-in-northern-hemisphere
Overduin, P. P., et al. "Submarine Permafrost Map in the Arctic Modeled Using 1‐D Transient Heat Flux (SuPerMAP)." Journal of Geophysical Research: Oceans 124.6 (2019): 3490-3507.
Obu, Jaroslav, et al. "Northern Hemisphere permafrost map based on TTOP modelling for 2000–2016 at 1 km2 scale." Earth-Science Reviews (2019).
*May have a change detection product too (2003 to 2019) released by the ESA CCI group