Greenhouse gas emissions from permafrost thaw ponds in the Canadian Arctic: influence of geomorphology, carbon lability and microbial processes

We sampled gas, water, ice, permafrost and lacustrine sediment in different types of aquatic systems: polygonal ponds, collapsed ice-wedge trough ponds, and larger lakes (1 thermokarst lake and 1 kettle lake) overlying unfrozen lake bottom sediments (talik). Measurements included physicochemical profiling of water column, thermal structure, concentrations of dissolved organic matter, ions, nutrients, oxygen and GHG, diffusion and ebullition flux of GHG, soil properties, and 14C dating of GHG, dissolved organic matter, soil and lake sediment. We also performed on-site incubations of permafrost, active layer and lake sediment samples to explore the carbon lability in these systems. Finally we retrieved temperature and oxygen data loggers installed in 2014 on different lakes and ponds for one complete year.

Metadata Access
Creator Laurion, Isabelle; Bouchard, Frédéric; Fortier, Daniel; McIntyre, Sally; Preskienis, Vilmantas; Centre d'études nordiques
Publisher Canadian Cryospheric Information Network
Contributor Polar Data Catalogue
Publication Year 2015
Rights Research programs, CCIN, or ArcticNet take no liability for the use or transmission of this data
OpenAccess true
Contact frederic.bouchard(at); pdc(at)
Language English
Format Computer file
Discipline Environmental Research
Spatial Coverage (-79.970W, 73.150S, -79.970E, 73.150N)
Temporal Coverage Begin 2015-05-20T00:00:00Z
Temporal Coverage End 2015-07-20T00:00:00Z