Supersaturation and evasion of CO2 and CH4 in surface waters at Mer Bleue peatland,Canada |
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| Authors: | M F Billett T R Moore |
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| Institution: | 1. Centre for Ecology & Hydrology, Edinburgh Research Station, Bush Estate, Penicuik, Midlothian EH26 0QB, Scotland, UK;2. Department of Geography and the Global Environmental & Climate Change Centre, McGill University, Burnside Hall, 805 Sherbrooke St. W., Montréal, Québec H3A 2K6, Canada |
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| Abstract: | Carbon dioxide (CO2) and methane (CH4) concentrations and evasion rates were measured in surface waters draining Mer Bleue peatland (Ontario, Canada) between spring and autumn 2005. All sites exhibit a consistent pattern of supersaturation throughout the year, which is broadly related to hydrological and temperature changes between spring snowmelt and autumn freezing. Both measurements and estimates of CO2 and CH4 evasion from open water to the atmosphere suggest that parts of the catchment (including beaver dams) are significant degassing hot spots. We present data showing how vertical gaseous carbon fluxes compare with lateral carbon fluxes and make an initial estimate of the importance to the overall carbon budget of CO2 and CH4 evasion to the atmosphere from water surfaces at Mer Bleue. Copyright © 2007 John Wiley & Sons, Ltd. |
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| Keywords: | peatland evasion carbon dioxide methane supersaturation DOC |
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