High-resolution analyses of recent sediments from a Norwegian mountain lake and comparison with instrumental records of climate

• Main Authors: Cameron, NG, Schnell, OA, Rautio, ML, Lami, A, Livingstone, DM, Appleby, PG, Dearing, JA, Rose, NL
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: KLUWER ACADEMIC PUBL 2002
• Subjects: mountain lake; Norwegian Mountains; diatoms; cladocerans; chironomids; chrysophytes; mineral magnetics; carbonaceous particles; pigments; climate; instrumental records; CLADOCERAN REMAINS; SURFACE-SEDIMENT; CORE ANALYSES; ARCTIC LAKES; ACIDIFICATION; TEMPERATURE; DYNAMICS; PROJECT; NORWAY; ALPINE; Arctic; Norway; Lake May; Climate change
• Online Access: http://discovery.ucl.ac.uk/133046/

The purpose of the palaeolimnological research project carried out at Ovre Neadalsvatn 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 instrumental-climate measurements were evaluated.Acid deposition at Ovre Neadalsvatn has been low and its impact limited. Whilst there has been an overall rise in mean annual temperature of about 1 degrees 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.