Palsas are peat permafrost mounds underlain by ice-rich permafrost. Due to climate change, they could disappear by the end of the century. When palsas thaw, changes occur in hydrological conditions affecting the carbon (C) cycle. In our study, we simulated permafrost thaw under different water treatments using 1-meter soil columns from a palsa. We measured CH₄ and CO₂ emissions for 3-month incubation. Our results show that following thaw, flooding the cores leads to increased CO₂ emissions.