Climate-carbon feedback tradeoff between Arctic and alpine permafrost under warming.

ABSTRACT: Whether greenhouse gas (GHG) emissions from permafrost will trigger positive climate feedbacks under warming remains unknown. Here, we synthesized the response of growing season carbon dioxide (CO₂), methane (CH₄), and nitrous oxide (N₂O) emissions to experimentally manipulated warming of ~2°C for permafrost in alpine and Arctic regions. Warming weakened the GHG sink of alpine permafrost, thereby increasing (13%) its global warming potential, but strengthened the GHG sink of Arctic permafrost and decreased (-10%) its global warming potential. When warming caused drying of alpine permafrost soils, the CO₂ sink weakened but the CH₄ sink increased. In contrast, warming of relatively wet Arctic permafrost increased the CO₂ sink

SUBMITTER: Bao T 

PROVIDER: S-EPMC12442865 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature