Preferred slip-band orientations and bending observed in the Dome Concordia (East Antarctica) ice core

Preferred slip band orientations and bending observed in the Dome Concordia ice core

Fabric analysis of the upper 1300m of the Dome C ice core reveals a slight clustering tendency of c axes towards vertical, which gradually enhances with depth from an initially isotropic orientational distribution of c axes at the free surface. Such a strain induced anisotropy is compatible with the expected macroscale stress state in a dome, viz. dominated by vertical compression. Yet, when on...

A tentative chronology for the EPICA Dome Concordia ice core

A tentative age scale (EDC1) for the last 45 kyr is established for the new 788-m EPICA Dome C ice core using a simple ice flow model. The age of volcanic eruptions, the end of the Younger Dryas event, and the estimated depth and age of elevated Be, about 41 kyr ago were used to calibrate the model parameters. The uncertainty of EDC1 is estimated to ± 10 yr for 0 to 700 yr BP, up to ± 200 yr ba...

Automatic reconstruction of polycrystalline ice microstructure from image analysis : application to the EPICA ice core at Dome Concordia, Antarctica

TALDICE-1 age scale of the Talos Dome deep ice core, East Antarctica

A new deep ice core drilling program, TALDICE, has been successfully handled by a European team at Talos Dome, in the Ross Sea sector of East Antarctica, down to 1620 m depth. Using stratigraphic markers and a new inverse method, we produce the first official chronology of the ice core, called TALDICE-1. We show that it notably improves an a priori chronology resulting from a one-dimensional ic...

Ice flow modelling at EPICA Dome C and Dome Fuji, East Antarctica

1 Laboratoire de Glaciologie et Géophysique de l’Environnement, CNRS and Joseph Fourier University, Grenoble, France 2 Laboratoire des Sciences du Climat et de l’Environnement, Gif-Sur-Yvette, France 3 Niels Bohr Institute for Astronomy, Physics and Geophysics, Copenhagen, Denmark 4 National Institute of Polar Research, Research Organization of Information and Systems (ROIS), Tokyo, Japan 5 Cen...