Concentrations, fluxes and isotopic signatures of greenhouse gases emitted from lakes and ponds on Bylot Island, Nunavut, Canada

Arctic lakes and ponds can be hot spots for greenhouse gas (GHG) emissions, yet studies are scarce, particularly outside the peak summer season. Here we present GHG diffusive and ebullition flux data collected over a decade from a range of water bodies formed on an organic-rich, polygonal landscape originating from syngenetic permafrost. The GHG concentrations and flux data are supplemented with radiocarbon and stable isotope signatures of the emitted gases, together with limnological properties of the studied lakes and ponds.

北极湖泊与池塘往往是温室气体（GHG）排放的热点区域，然而相关研究却相对匮乏，尤其是在夏季高峰期之外。本研究呈现了从富含有机质的、由共生型冻土形成的多边形景观上的多种水体中，经过十年收集的温室气体扩散和沸腾通量数据。温室气体浓度和通量数据得到了排放气体放射性碳和稳定同位素特征的补充，以及所研究湖泊与池塘的水文特性。