Temperate and boreal forests possess greater diversity of physiological traits related to plant hydraulics, so they are more buffered against drought than tropical forests . Nevertheless, in temperate forests, drought-induced tree mortality under RCP8.5 could cause the loss of half the Northern Hemisphere conifer forest area by 2100 . In the western USA, under RCP8.5, one-tenth of forest area is highly vulnerable to drought-induced mortality by 2050 . In California, increased evapotranspiration in Sierra Nevada conifer forests increases the potential fraction of the area at risk of tree mortality by 15-20% per degree Celsius . In Alaska, fire-induced tree mortality from climate change under RCP8.5 could reduce the extent of spruce forest  by 8-44% by 2100 . Under RCP8.5, tree mortality from drought, wildfire and bark beetles could reduce the timber productivity of boreal forests in Canada by 2100 below the current levels . In Tasmania, projected increases in wildfire  increase the risk of mortality of mesic vegetation  and threaten the disappearance of the long-lived endemic pencil pine   and temperate montane rainforest . These projections indicate risks of climate change-induced tree mortality reducing some temperate forest areas by half under emissions scenarios of 2.5°C-4℃ above the pre-industrial period .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report