Trends in the Water Chemistry of High Altitude Lakes in Europe |
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| Authors: | Mosello R Lami A Marchetto A Rogora M Wathne B Lien L Catalan J Camarero L Ventura M Psenner R Koinig K Thies H Sommaruga-Wögrath S Nickus U Tait D Thaler B Barbieri A Harriman R |
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| Institution: | (1) CNR Istituto Italiano di Idrobiologia, Verbania Pallanza, Italy;(2) Norwegian Institute for Water Research, Kjelsas, Oslo, Norway;(3) Dept. Ecology, University of Barcelona, Barcelona, Spain;(4) Inst. Zoology and Limnology, University of Innsbruck, Innsbruck, Austria;(5) Inst. Meteorology, University of Innsbruck, Innsbruck, Austria;(6) Laboratorio Biologico – APPA, Laives (BZ), Italy;(7) Dip. Territorio Ambiente, Laboratorio Studi Ambientali, Sez. Protezione Aria Acqua, Lugano, Switzerland;(8) Freshwater Fisheries Laboratory, Pitlochry, Perthshire, Scotland, U.K |
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| Abstract: | Here we present the chemical trends of seven high altitude lakes, analysed within the AL:PE and MOLAR Projects of the EU (1999) and selected on the basis of the availability of complete and reliable data for the period 1984–1999. The lakes are representative of the Scandinavian Alps, the Cairngorm Mountains in Scotland, the Alps and the Pyrenees. Significant trends were identified for some indicators of acidification, for instance pH and alkalinity, but not all lakes reacted similarly to decreasing depositions of sulphate and base cations. Differences in lake response are discussed in relation to recent variations of atmospheric deposition chemistry and associated changes in climatic conditions. Beside individual variations of the studied lakes, depending, among other things, on altitude and morphology, catchment characteristics and climate trends play a major role for the reaction of high altitude lakes on changes in atmospheric depositions. |
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| Keywords: | acidification atmospheric deposition remote lakes trend water chemistry |
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