| Abstract | The purpose of the palaeolimnological research project carried out at Øvre Neådalsvatn was to apply a number of physical and biological proxy-climate analyses to recent sediments and to compare the results of these analyses with instrumental records of climate. Using a radiometric chronology to match the sediment core with the calendar ages of the reconstructed instrumental record, and by time-averaging the instrumental record, the statistical significance of the relationships between each of the sediment-climate proxies and the reconstructed instrumentalclimate
measurements were evaluated.
Acid deposition at Øvre Neådalsvatn has been low and its impact limited. Whilst there has been an overall rise in mean annual temperature of about 1 °C since 1900, the physical and biological sediment records studied appear to be insensitive to climate warming of this magnitude. On the one hand, this may be a result of the loss in temporal resolution caused by time-averaging the instrumental data; on the other hand, the lake may be insensitive to the impact of this climate change. |
| Authors | Cameron N.G., Schnell X.A., Rautio M.L., Lami A., Livingstone D.M., Appleby P.G., Dearing J.A., Rose N.L. |
| Text | 52734 2002 10.1023/A 1020324019052 mountain lake Norwegian Mountains diatoms cladocerans chironomids chrysophytes mineral magnetics carbonaceous particles pigments climate instrumental records High resolution analyses of recent sediments from a Norwegian mountain lake and comparison with instrumental records of climate Cameron N.G., Schnell X.A., Rautio M.L., Lami A., Livingstone D.M., Appleby P.G., Dearing J.A., Rose N.L. N.G. Cameron Environmental Change Research Centre, Department of Geography, University College London, UK Ø.A. Schnell Department of Zoology, University of Bergen, Norway M.L. Rautio Department of Ecology and Systematics, Division of Hydrobiology, University of Helsinki, Finland A. Lami CNR Istituto Italiano di Idrobiologia, Verbania, Pallanza, Italy D.M. Livingstone Environmental Tracers Group, Water Resources Department, Swiss Federal Institute of Environmental Science and Technology EAWAG , Dubendorf, Switzerland P.G. Appleby Department of Applied Mathematics and Theoretical Physics, University of Liverpool, UK J.A. Dearing Environmental Magnetism Laboratory, Department of Geography, University of Liverpool, UK N.L.Rose Environmental Change Research Centre, Department of Geography, University College London, UK The purpose of the palaeolimnological research project carried out at Øvre Neådalsvatn was to apply a number of physical and biological proxy climate analyses to recent sediments and to compare the results of these analyses with instrumental records of climate. Using a radiometric chronology to match the sediment core with the calendar ages of the reconstructed instrumental record, and by time averaging the instrumental record, the statistical significance of the relationships between each of the sediment climate proxies and the reconstructed instrumentalclimate measurements were evaluated. Acid deposition at Øvre Neådalsvatn has been low and its impact limited. Whilst there has been an overall rise in mean annual temperature of about 1 °C since 1900, the physical and biological sediment records studied appear to be insensitive to climate warming of this magnitude. On the one hand, this may be a result of the loss in temporal resolution caused by time averaging the instrumental data; on the other hand, the lake may be insensitive to the impact of this climate change. 28 Published version Journal of Paleolimnology 28 79 93 Journal_of_Paleolimnology_28_79_93.pdf Articolo in rivista Kluwer Academic 0921 2728 Journal of paleolimnology Journal of paleolimnology J. paleolimnol. andrea.lami LAMI ANDREA |
