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Supersaturation and evasion of CO 2 and CH 4 in surface waters at Mer Bleue peatland, Canada
Author(s) -
Billett M. F.,
Moore T. R.
Publication year - 2007
Publication title -
hydrological processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.222
H-Index - 161
eISSN - 1099-1085
pISSN - 0885-6087
DOI - 10.1002/hyp.6805
Subject(s) - peat , atmosphere (unit) , carbon dioxide , snowmelt , environmental science , hydrology (agriculture) , methane , atmospheric sciences , surface water , interflow , carbon fibers , dissolved organic carbon , snow , geology , groundwater , environmental chemistry , chemistry , ecology , geomorphology , meteorology , materials science , physics , geotechnical engineering , organic chemistry , environmental engineering , composite number , composite material , biology
Carbon dioxide (CO 2 ) and methane (CH 4 ) 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 CO 2 and CH 4 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 CO 2 and CH 4 evasion to the atmosphere from water surfaces at Mer Bleue. Copyright © 2007 John Wiley & Sons, Ltd.