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carbon cycle
    introduction
  Introduction  
  Arctic ponds  
  Physicochemical portrait of a pond  
  Microbial life
  Photolysis of dissolved organic carbon  
  Implications for climate change  
 
Thaw ponds found in permafrost zones in the Arctic could have a significant impact on the global carbon cycle. Closer study is called for, particularly within the current climate-change context. In Siberia, Alaska and Scandinavia, these areas have been studied, but in Canada, very little. Since 2005, over 75 ponds and lakes have been sampled in the Qarlikturvik Valley on Bylot Island by our research team.

Our team has studied numerous aspects of thaw pond ecology. We have described physicochemical characteristics (temperature, thermal structure, pH, nutrients), we measured concentration and fluxes of dissolved gases (O2, CO2 and CH4) as well as identified microbial communities.

Our goals are to better understand how these ecosystems function, what types of life forms proliferate there, how carbon circulates through the ecosystem, the impact of global warming on their development and their role in the tundra, as well as the overall influence these systems have on global climate.