Folgefonna, Western Norway 6,000 Year Glacial Lake Sediment Data and ELA Reconstruction Bakke, J.; Lie, O.; Nesje, A.; Olaf Dahl, S.; Paasche, O. Bakke, J. Lie, O. Nesje, A. Olaf Dahl, S. Paasche, O. Glaciers and Ice Sheets Reconstruction PAGES 2k Network PAGES Arctic 2k earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,x-ray particle size analysis,N,coarse silt) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,x-ray particle size analysis,N,very fine sand) earth science/paleoclimate/paleolimnology (organic matter,sediment,null,weight percent,null,paleolimnology,null,loss on ignition,N,the samples were ignited for 1 h at 550C) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (volume magnetic susceptibility,sediment,null,dimensionless (SI system),null,paleolimnology,null,x-ray particle size analysis,N,x10-5 units) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,x-ray particle size analysis,N,medium silt) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,x-ray particle size analysis,N,fine silt) earth science/paleoclimate/climate reconstructions|paleolimnology (equilibrium line altitude,null,null,meter,null,climate reconstructions|paleolimnology,null,null,N,lake dry bulk density) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (density,dry sediment,null,gram per cubic centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,x-ray particle size analysis,N,very coarse silt) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,x-ray particle size analysis,N,very fine silt) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,x-ray particle size analysis,N,clay) earth science/paleoclimate/paleolimnology (Dravladalsvatn>LATITUDE 60.25>LONGITUDE 6.45) (Vassdalsvatn>LATITUDE 60.35>LONGITUDE 6.98) The maritime plateau glacier of northern Folgefonna in western Norway has a short (subdecadal) response time to climatic shifts, and is therefore well suited for reconstructing high-resolution glacier fluctuations. The reconstruction presented here is based on physical parameters of glaciolacustrine sediments retrieved from two glacier-fed lakes and a peat bog north of the ice cap. Bulk density and modelled glacier net mass balance for the last 200 years show a remarkably similar pattern, where maximum sediment yield lags the glacier net mass balance by~10 years. The record of glacier variations has been transferred into an equilibrium- line altitude (ELA) variation curve. Glaciers respond primarily to changes in summer temperature and winter precipitation. At present there is a high correlation between the North Atlantic Oscillation (NAO) index and measured (since the early 1960s) net mass balance on maritime glaciers in western Norway (r= ~0.8). Reconstructed glacier variations from maritime western Norway are therefore considered indicative of the strength of the westerly airflow associated with NAO during the Holocene. The early phase of mid-Holocene glacier growth (5200 cal. yr BP) was characterized by gradual glacier expansion culminating in the first Subatlantic glacial event at 2300 cal. yr BP. The climate during the last 2200 years has favoured increased glacier activity at Folgefonna. High-amplitude shifts in ELA may be explained by unstable modes of the westerlies causing significant variability of winter precipitation. During the last 2000 years, Folgefonna expanded and decayed with significant decadal variability. During the latest period of the 'Mediaeval Warm Epoch', Folgefonna advanced. The Neoglacial maximum, however, was reached during the 'Little Ice Age' at AD 1750 and AD 1870. The northern Folgefonna glacial record is compared to other Holocene glacier records in Scandinavia. STUDY NOTES: The two glacial-fed lakes were cored using a modified piston corer taking up to 6 m long cores with diameter 110 mm. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Bakke, J. Investigator : Lie, O. Investigator : Nesje, A. Investigator : Olaf Dahl, S. Investigator : Paasche, O. 2006-03-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5449 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/norway/folgefonna2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/norway/folgefonna2005.xls https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/norway/folgefonna2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/norway/folgefonna2005.xls English https://www.ncdc.noaa.gov/paleo/study/5449 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/norway/folgefonna2005.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/europe/norway/folgefonna2005.xls Bakke, J., O. Lie, A. Nesje, S. Olaf Dahl, and O. Paasche.2005Utilizing physical sediment variability in glacier-fed lakes for continuous glacier reconstructions during the Holocene, northern Folgefonna, western NorwayThe Holocene152161-176 START YEAR: 5932 cal yr BP * END YEAR: 19 cal yr BP 6.45 60.25 6.98 60.35