Climate-induced shifts towards forests in what is currently tundra would be expected to reduce regional albedo especially in spring, but also during parts of winter when trees are snow-free , which amplifies warming regionally  . Trees would also enhance momentum absorption compared to low tundra vegetation, thus impacting surface-atmosphere mixing of latent and sensible heat fluxes . Boreal forests insulate and stabilize permafrost and reduce fluctuations of ground temperature: the amplitude of variation of ground surface temperatures was 28℃ at a forested site, compared to 60℃ in nearby grassland  . Likewise, a shift in moist tropical forests towards vegetation with drought-tolerant traits could possibly reduce evapotranspiration, increase albedo, alter heat transfer at the surface and lead to a negative feedback to
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report