Journal Article 4 tundra vegetation Arctic amplification 1 CO2 flux 1 Lemmus 1 Microtus 1 Myodes 1 mehr ... Rangifer 1 Research Support, Non-U.S. Gov't 1 alternative stable state 1 carbon balance 1 climate change 1 climate warming 1 climate-growth association 1 diffuse radiation 1 grazer 1 greenness 1 gross primary production 1 lake drainage 1 light extinction 1 nitrogen extinction 1 northern Alaska 1 permafrost 1 positive feedback 1 regime shift 1 remote sensing 1 ring width 1 specific leaf area 1 thermokarst 1 tree and shrub 1 weniger ...