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Permafrost thaw in peat plateaus leads to the flooding of surface soils and the formation of collapse scar bogs, which have the potential to be large emitters of methane (CH4) from surface peat as well as deeper, previously frozen, permafrost carbon (C). We used a network of bubble traps, permanently installed 20?cm and 60?cm beneath the moss surface, to examine controls on ebullition from three collapse bogs in interior Alaska. Overall, ebullition was dominated by episodic events that were associated with changes in atmospheric pressure and ebullition was mainly a surface process regulated by both seasonal ice dynamics and plant phenology. The majority (>90%) of ebullition occurred in surface peat layers, with...
map background search result map search result map Controls on methane released through ebullition in peatlands affected by permafrost degradation Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Response of plant community structure and primary productivity to experimental drought and flooding in an Alaskan fen Effects of soil moisture and water depth on ERS SAR backscatter measurements from an Alaskan wetland complex Controls on methane released through ebullition in peatlands affected by permafrost degradation Response of plant community structure and primary productivity to experimental drought and flooding in an Alaskan fen Algal community response to experimental and interannual variation in hydrology in an Alaskan boreal fen Effects of soil moisture and water depth on ERS SAR backscatter measurements from an Alaskan wetland complex