Greening in the circumpolar high-latitude may amplify warming in the growing season

Abstract

We present a study that suggests greening in the circumpolar high-latitude regions ampli？es surface warming in the growing season (May？September) under enhanced greenhouse conditions. The investigation used a series of climate simulations with the Community Atmospheric Model version 3―which incorporates a coupled, dynamic global vegetation model―with and without vegetation feedback, under both present and doubled CO2 concentrations. Results indicate that climate warming and associated changes promote circumpolar greening with northward expansion and enhanced greenness of both the Arctic tundra and boreal forest regions. This leads to additional surface warming in the Arctic region.f climate simulations with the Community Atmospheric Model version 3―which incorporates a coupled, dynamic global vegetation model―with and without vegetation feedback, under both present and doubled CO2 concentrations. Results indicate that climate warming and associated changes promote circumpolar greening with northward expansion and enhanced greenness of both the Arctic tundra and boreal forest regions. This leads to additional surface warming in the Arctic region.