Polarimetric Radar Data and Ice Core Data Collected at Hammarryggen Ice Rise, Antarctica

Polarimetric Radar Data and Ice Core Data Collected at Hammarryggen Ice Rise

AUTHORS:
Frank PATTYN, Sarah WAUTHY, Sainan SUN, Jean-Louis TISON, Veronica TSIBULSKAYA
Laboratoire de Glaciologie
Université libre de Bruxelles (ULB)
Brussels, Belgium

FUNDING:
Project MASS2ANT (Belgian Science Policy Office - BELSPO)

DATA FILES ACCOMPAGING PAPER BY REZA ERSHADI et al. (2023)
Deciphering the Ice Dynamic History of a Promontory Ice Rise with Triple Junction: A Polarimetric Radar Approach

Autonomous Phase Sensitive Radar (ApRES) measurements Hammaryggen Ice Rise

FILES: Folders 2018p00 to 2018p14 + ApRESpos.csv
Measurements by F. Pattyn and S. Sun

Each folder contains the raw ApRES data sampled at the site. The 'Survey' files are single measurements with exactly the same antenna orientation and taken almost a year apart (exact date in the file name). The 'Survey' or 'DATA' files ending on HH, HV, VV, VH are measurements for each of  the four antenna orientations for the polarimetric analysis. Each folder is a data point along a survey line perpendicular to the ice divide of the Hammaryggen ice rise, East Antarctica. The geographic positions of the data points 
are given in the table ApRESpos.csv.

Eigen values of c-axes distribution for discrete samples from the Hammaryggen ice core

FILE: HammeryggenIceFabric.xls
Measurements by S. Wauthy, J.L. Tison and V. Tsibulskaya

This table provides the eigen values of c-axes distribution for discrete samples from the Hammaryggen ice core (Wauthy et al., 2023). Data have been collected from discrete 8 cm vertical thin sections. The thin sections were obtained using standard techniques in glaciology (Langway, 1958) and analysed with an Automatic Fabric Analyzer (AFI, Wilson et al., 2003). Raw data from 
the AFI are at the pixel scale. To derive ice fabric data at the ice grain scale, the FAME software has been used (Hamme and Peternell, 2006). The software delineates grains using image analysis techniques and derives statistics for grain number, size and morphology and ice crystal orientation in space (c-axes). The software calculates eigen vectors and values for the c-axes distribution in each thin section.

Column A of the table gives the top depth of each thin section analyzed, columns B to D give the eigen-values of the c-axes distribution used in this paper, to compare to modelled ones.

References:

Hamme, D.M. and Peternell, M. (2016) FAME software for analysing rock microstructures, Computer and Geosciences, vol. 90, Part A, pp. 24-33. Doi: 10101b/j.cogeo.2016.02.010

Langway, C. C. J. (1958). Ice fabrics and the Universal stage, CRREL Technical Report, 62: 16.

Wauthy, S., Tison, J.-L., Inoue, M., El Amri, S., Sun, S., Claeys, P., and Pattyn, F.: Physico-chemical properties of the top 120 m of two ice cores in Dronning Maud Land (East Antarctica): an open window on spatial and temporal regional variability of environmental proxies, Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2023-152, in review, 2023

Wilson , C.J.L., Russell-Head D.S. and Sim, H.M. (2003) The application of an automated fabric analyser system to the textural evolution of folded ice layers in shear zones, Annals of Glaciology, vol. 37, PP. 7-17