Chapter

The Impact of Climate Change on European Lakes

Volume 4 of the series Aquatic Ecology Series pp 199-220

Date:

Impacts of Climate on the Flux of Dissolved Organic Carbon from Catchments

  • Eleanor JenningsAffiliated withDepartment of Applied Sciences, Dundalk Institute of Technology Email author 
  • , Marko JärvinenAffiliated withSYKE Jyväskylä, University of Jyväskylä
  • , Norman AllottAffiliated withCentre for the Environment, Trinity College
  • , Lauri ArvolaAffiliated withUniversity of Helsinki, Lammi Biological Station, Trinity College
  • , Karen MooreAffiliated withNew York City Department of Environmental Protection
  • , Pam NadenAffiliated withCentre for Ecology and Hydrology
  • , Caitriona Nic AonghusaAffiliated withMarine Institute
  • , Tiina NõgesAffiliated withEstonian University of Life Sciences
  • , Gesa A. WeyhenmeyerAffiliated withDepartment of Ecology and Evolution/Limnology, Uppsala University

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Abstract

Recent increases in dissolved organic carbon (DOC) concentrations in surface waters across both Europe and North America have focused attention on the factors controlling the export of DOC compounds from catchments. Waters containing high concentrations of DOC generally have a characteristic brown colour and are associated with the presence of highly organic soils. Catchments dominated by these soils typically export between 10 and 300 kg DOC ha−1 year−1 (Billett et al., 2004; Laudon et al., 2004; Jonsson et al., 2006). A portion of this DOC is mineralised in streams and lakes to CO2, while the remainder is transported to the sea (Jonsson et al., 2006). Organic matter accumulates in soils when decomposition rates are restricted either by low temperatures or water-logged conditions. In Europe organic soils are found mainly in colder, wetter