Insights on System Productivity Stemming from a Long Term Follow-up of CO2 Emissions from a Young Boreal Reservoir, Eastmain 1, QC, Canada.
Insights on System Productivity Stemming from a Long Term Follow-up of CO2 Emissions from a Young Boreal Reservoir, Eastmain 1, QC, Canada.
French Title: Réflections quant à la productivité du jeune réservoir Eastmain 1 (QC, Canada) à partir de mesures à long terme des émissions de CO2.
Abstract ID#: 36459
English Abstract:
Eastmain 1 reservoir (Quebec, Canada) was flooded in November 2005. To increase the volume of water stored in Eastmain 1, the Rupert River was diverted. Partial flooding of the Rupert diversion bays (RD) took place in 2009 and the flooding was completed in 2011. The impoundment of organic matter is known to lead to GHG emissions at the water surface of newly created reservoirs. Remarkably, the different approaches/methods used to monitor CO2 and CH4 partial pressures and emissions over 7 years showed comparable results. The impact of the creation of a new reservoir upstream the Eastmain 1 Reservoir was shown to be week in term of emissions. Summer and winter system productivity was estimated from CO2 continuous measurements; for example respiration rates from 19 to 148 mgC.m-3.d-1 were found in summer at the central station of the reservoir, which is comparable to published data using different method. Finally datasets from other boreal reservoirs were used to explore the relationship between winter and summer production rate and put in perspective the lability of the organic matter in these systems.