or does not show upslope advance , or moves downwards . In the Tibetan Plateau, the treeline either shifted upwards or showed no significant upwards shift . This can be explained by site-specific complex interaction of positive effect of warming on tree growth, and negative effects of drought stress, change in snow precipitation, inter- and intraspecific interactions of trees and shrubs, land-use change  and other factors . It is largely unknown how broader-scale climate inputs, such as pre-monsoon droughts, interact with local-scale factors to govern treeline response patterns .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report