Dissolved organic carbon trends resulting from changes in atmospheric deposition chemistry

Donald T. Monteith (), John L. Stoddard, Christopher D. Evans, Heleen A. de Wit, Martin Forsius, Tore Høgåsen, Anders Wilander, Brit Lisa Skjelkvåle, Dean S. Jeffries, Jussi Vuorenmaa, Bill Keller, Jiri Kopácek and Josef Vesely
Additional contact information
Donald T. Monteith: Environmental Change Research Centre, UCL, London, WC1E 6BT, UK
John L. Stoddard: US EPA, Corvallis, Oregon 97333, USA
Christopher D. Evans: Centre for Ecology and Hydrology, Bangor, LL57 2UW, UK
Heleen A. de Wit: Norwegian Institute for Water Research
Martin Forsius: Finnish Environment Institute, PO Box 140, FI-00251 Helsinki, Finland
Tore Høgåsen: Norwegian Institute for Water Research
Anders Wilander: Department of Environment Assessment SLU
Brit Lisa Skjelkvåle: Norwegian Institute for Water Research
Dean S. Jeffries: Environment Canada, Burlington, Ontario, L7R4A6, Canada
Jussi Vuorenmaa: Finnish Environment Institute, PO Box 140, FI-00251 Helsinki, Finland
Bill Keller: Ontario Ministry of the Environment, Laurentian University, Sudbury, Ontario, P3E 2C6, Canada
Jiri Kopácek: Biology Centre, Institute of Hydrobiology
Josef Vesely: Czech Geological Survey

Nature, 2007, vol. 450, issue 7169, 537-540

Abstract: Brown waters There have been widespread reports of surface waters in many remote glaciated regions of North America and Northern Europe becoming browner as levels of dissolved organic carbon have increased. Several hypotheses have been proposed to explain the effect, including recent climate change, but the question remains controversial. A new survey of time series data from more than 500 remote lakes and streams, combined with a simple model, now shows that dissolved organic carbon concentrations are in fact closely related to the decline in the sulphate and seasalt content of atmospheric deposition. Dissolved organic carbon concentrations may therefore be returning towards levels that would have been typical prior to the first onset of acid rain during the nineteenth century.

Date: 2007
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DOI: 10.1038/nature06316

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