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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 2, issue 4
Hydrol. Earth Syst. Sci., 2, 431–437, 1998
https://doi.org/10.5194/hess-2-431-1998
© Author(s) 1998. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: The DYNAMO Project

Hydrol. Earth Syst. Sci., 2, 431–437, 1998
https://doi.org/10.5194/hess-2-431-1998
© Author(s) 1998. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  31 Dec 1998

31 Dec 1998

Applying MERLIN for modelling nitrate leaching in a nitrogen saturated Douglas fir forest in the Netherlands after decreased atmospheric nitrogen input

A. Tietema1, B. A. Emmett2, and B. J. Cosby3 A. Tietema et al.
  • 1Netherlands Centre for Geo-Ecological Research (ICG), University of Amsterdam, Nieuwe Prinsengracht 130, 1018 VZ, Amsterdam, The Netherlands,
  • 2Institute of Terrestrial Ecology, Bangor Research Unit, Deiniol Road, Bangor, Gwynedd LL57 2UP, UK,
  • 3Department of Environmental Sciences, University of Virginia, Charlottesville, VA, USA 22901.

Abstract. The MERLIN model was applied on the results of a field-scale manipulation experiment with decreased nitrogen (N) deposition in an N saturated forest ecosystem in the Netherlands. The aim was to investigate the mechanisms that could explain the observed rapid response of nitrate as a result of the decreased N input. Calibrating the model to pre-treatment data revealed that, despite the high atmospheric N input, the trees relied on N mineralised from refractory organic matter (ROM) for their growth. MERLIN could simulate only the fast response of nitrate leaching after decreased input if this ROM mineralisation rate was decreased strongly at the time of the manipulation experiment.

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