Futter, Martyn
- The Macaulay Land Use Research Institute
Abstract
Concentrations of dissolved organic carbon (DOC) are increasing in many surface waters across Europe. Two of the main mechanisms proposed to explain this increase are declines in sulfate (SO(4)(2-)) deposition and changes in climate. Many of the reductions in SO(4)(2-) have already occurred; climate change related effects are occurring now and will continue in the future. This paper presents the first application of a new version of INCA-C, the Integrated Catchments model for Carbon, which simulates the effects of both climate and SO(4)(2-) deposition on surface water DOC concentration ([ DOC]). The model was applied to Valkea-Kotinen, a small headwater catchment in Finland, where it was able to simulate present-day (1990-2007) trends in [DOC] in the lake and catchment outflow as functions of observed climate and European Monitoring and Evaluation Programme (EMEP)-modelled SO(4)(-2) deposition. Using a parameter set derived from a present-day calibration, the model was run with two climate scenarios from the Special Report on Emissions Scenarios (SRES) and three EMEP deposition scenarios to simulate surface water [ DOC] between 1960 and 2100. The results show that much of the historical increase in [DOC] can be explained as a result of historical declines in SO(4)(2-) deposition and that surface water [DOC] will continue to increase as climate changes.
Keywords
acidification; climate change; dissolved organic carbon; Finland; model; Valkea Kotinen
Published in
Hydrology research
2009, volume: 40, number: 2-3, pages: 291-305
Publisher: IWA PUBLISHING
SLU Authors
UKÄ Subject classification
Environmental Sciences
Publication identifier
- DOI: https://doi.org/10.2166/nh.2009.101
Permanent link to this page (URI)
https://res.slu.se/id/publ/83801