EPICA Dome C EDC3 accumulation, thinning and Delta-elevation scenario Parrenin, F.; Dreyfus, G.; Durand, N.; Fujita, S.; Gagliardini, O.; Gillet, F.; Jouzel, J.; Kawamura, K.; Lhomme, N.; Masson-Delmotte, V.; Ritz, C.; Schwander, J.; Shoji, H.; Uemura, R.; Watanabe, O.; Yoshida, N. Parrenin, F. Dreyfus, G. Durand, N. Fujita, S. Gagliardini, O. Gillet, F. Jouzel, J. Kawamura, K. Lhomme, N. Masson-Delmotte, V. Ritz, C. Schwander, J. Shoji, H. Uemura, R. Watanabe, O. Yoshida, N. earth science/paleoclimate/ice cores (accumulation rate,bulk ice,null,centimeter per year,null,ice cores,null,null,N,null) earth science/paleoclimate/climate reconstructions|ice cores (ice sheet elevation,null,null,meter,null,climate reconstructions|ice cores,null,null,N,null) earth science/paleoclimate/ice cores (thinning function,bulk ice,null,dimensionless,null,ice cores,null,numerical simulation,N,null) earth science/paleoclimate/ice cores (sample identification,null,null,null,null,ice cores,null,null,C,null) earth science/paleoclimate/climate reconstructions|ice cores (depth,null,null,meter,null,climate reconstructions|ice cores,null,null,N,null) earth science/paleoclimate/ice core earth science/paleoclimate/ice core (EPICA Dome C>LATITUDE -75.1>LONGITUDE 123.4) One-dimensional (1-D) ice flow models are used to construct the age scales at the Dome C and Dome Fuji drilling sites (East Antarctica). The poorly constrained glaciological parameters at each site are recovered by fitting independent age markers identified within each core. We reconstruct past accumulation rates, that are larger than those modelled using the classical vapour saturation pressure relationship during glacial periods by up to a factor 1.5. During the Early Holocene, changes in reconstructed accumulation are not linearly related to changes in ice isotopic composition. A simple model of past elevation changes is developed and shows an amplitude variation of 110-120 m at both sites. We suggest that there is basal melting at Dome C (0.56±0.19 mm/yr). The reconstructed velocity profile is highly non-linear at both sites, which suggests complex ice flow effects. This induces a non-linear thinning function in both drilling sites, which is also characterized by bumps corresponding to variations in ice thickness with time. STUDY NOTES: Accumulation, vertical thinning function and Delta-elevation scenario as used to build the EDC3 age scale NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Parrenin, F. Investigator : Dreyfus, G. Investigator : Durand, N. Investigator : Fujita, S. Investigator : Gagliardini, O. Investigator : Gillet, F. Investigator : Jouzel, J. Investigator : Kawamura, K. Investigator : Lhomme, N. Investigator : Masson-Delmotte, V. Investigator : Ritz, C. Investigator : Schwander, J. Investigator : Shoji, H. Investigator : Uemura, R. Investigator : Watanabe, O. Investigator : Yoshida, N. 2012-10-15 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13418 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2007accum.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2007accum.txt English https://www.ncdc.noaa.gov/paleo/study/13418 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/epica_domec/edc2007accum.txt Parrenin, F., G. Dreyfus, G. Durand, S. Fujita, O. Gagliardini, F. Gillet, J. Jouzel, K. Kawamura, N. Lhomme, V. Masson-Delmotte, C. Ritz, J. Schwander, H. Shoji, R. Uemura, O. Watanabe and N. Yoshida. 2007. 1-D-ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica. Climate of the Past, 1 June 2007, DOI: 10.5194/cp-3-243-2007 START YEAR: 801662 cal yr BP * END YEAR: -50 cal yr BP 123.4 -75.1 123.4 -75.1