| Abstract | Critical load models for acidity provide a measure of the sensitivity of surface waters to acid deposition, and can be used to determine critical load exceedance and potential long-term harmful effects. Three static models, the Steady-State Water Chemistry model, diatom model and First-
order Acidity Balance model, are here applied to 11 high mountain lakes in Norway, Scotland, the Alps, the Pyrenees and the Tatras. Between five and seven of the lakes show critical load exceedance, depending on the model used. Nitrogen as well as sulphur deposition is important in causing
exceedance. Since soil and vegetation cover are generally sparse, geology and lake retention time appear to be key factors in the determination of
critical load. Retention of nitrogen is observed, but is unclear whether this occurs within the lake or the terrestrial part of the catchment. |
| Authors | Curtis C.J., Barbieri A., Camarero L., Gabathuler M., Galas J., Hanselmann K., Kopacek J., Mosello R., Nickus U., Rose N., Stuchlik E., Thies H., Ventura M., Wright R. |
| Text | 52726 2002 Acid deposition Critical loads FAB model High mountain lakes Nitrogen Sulphur Application of static critical load models for acidity to high mountain lakes in Europe Curtis C.J., Barbieri A., Camarero L., Gabathuler M., Galas J., Hanselmann K., Kopacek J., Mosello R., Nickus U., Rose N., Stuchlik E., Thies H., Ventura M., Wright R. C. J. Curtis Environmental Change Research Centre, London, UK A. Barbieri Lab. Studi Ambientali SPAA, Lugano, Switzerland L. Camarero Dept. Ecologia, University of Barcelona, Spain M. Gabathuler ETH Honggerburg, Zurich, Switzerland J. Galas Institute of Freshwater Biology, Polish Academy of Sciences, Krakow, Poland K. Hanselmann University of Zurich, Switzerland J. Kopacek Czech Rep. Academy of Sciences, Ceske Budejovice, Czech Rep. R. Mosello C.N.R. Istituto Italiano di Idrobiologia, Verbania Pallanza, Italy U. Nickus Institute of Meteorology Geophysics, Univ. of Innsbruck, Austria N. Rose Environmental Change Research Centre, London, UK E. Stuchlik Charles University, Prague, Czech Republic H. Thies Institute of Zoology Limnology, Univ. of Innsbruck, Austria M. Ventura Dept. Ecologia, University of Barcelona, Spain R. Wright Norway Institute for Water Research, Oslo, Norway Critical load models for acidity provide a measure of the sensitivity of surface waters to acid deposition, and can be used to determine critical load exceedance and potential long term harmful effects. Three static models, the Steady State Water Chemistry model, diatom model and First order Acidity Balance model, are here applied to 11 high mountain lakes in Norway, Scotland, the Alps, the Pyrenees and the Tatras. Between five and seven of the lakes show critical load exceedance, depending on the model used. Nitrogen as well as sulphur deposition is important in causing exceedance. Since soil and vegetation cover are generally sparse, geology and lake retention time appear to be key factors in the determination of critical load. Retention of nitrogen is observed, but is unclear whether this occurs within the lake or the terrestrial part of the catchment. 2 Published version Water Air Soil Pollution Focus 2 115 126 Water_Air_and_Soil_Pollution_Focus_2_115_126.pdf Articolo in rivista Kluwer Academic Publishers 0049 6979 Water, air and soil pollution Print Water, air and soil pollution Print Water, air and soil pollution. Print Water air soil pollut. Print Water, air soil pollution Print rosario.mosello MOSELLO ROSARIO |
