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Fluvial organic carbon flux from an eroding peatland catchment, southern Pennines, UK
1Upland Environment Research Unit, Geography, School of Environment and Development, Mansfield Cooper Building, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
2Department of Environmental and Geographical Sciences, Manchester Metropolitan University, John Dalton Extension Building, Chester Street, Manchester, M1 5GD, UK
Abstract. This study investigates for the first time the relative importance of dissolved organic carbon (DOC) and particulate organic carbon (POC) in the fluvial carbon flux from an actively eroding peatland catchment in the southern Pennines, UK. Event scale variability in DOC and POC was examined and the annual flux of fluvial organic carbon was estimated for the catchment. At the event scale, both DOC and POC were found to increase with discharge, with event based POC export accounting for 95% of flux in only 8% of the time. On an annual cycle, 40.8 t organic carbon (OC) is exported from the catchment, which represents an areal value of 107 gC m−2 a−1. POC was the most significant form of organic carbon export, accounting for ~82% of the estimated flux. This suggests that more research is required on both the fate of POC and the rates of POC export in eroding peatland catchments.
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Citation: Pawson, R. R., Rothwell, J. J., Daniels, S., Lord, D. R., Evans, M. G. E., and Allott, T. E. H.: Fluvial organic carbon flux from an eroding peatland catchment, southern Pennines, UK, Hydrol. Earth Syst. Sci. Discuss., 4, 719-745, 2007. Bibtex EndNote Reference Manager
