Ice layer stratigraphy and age structure data set connecting South Pole, Ridge B and Dome C in East Antarctica

For the description of the data, please refer to the publication in which it was first used and for which it was created: 

Leysinger Vieli, G. J.‐M. C., R. C. A. Hindmarsh, M. J. Siegert, and S. Bo (2011), Time‐dependence of the spatial pattern of accumulation rate in East Antarctica deduced from isochronic radar layers using a 3‐D numerical ice flow model, J. Geophys. Res., 116, F02018, doi:10.1029/2010JF001785

and its auxiliary material jgrf781-sup-0002-txts01.pdf.

The data set consists of manually picked, strongly reflecting internal layers of airborne ice penetrating radar data (60 MHz, 250 ns pulse length) scanned from the original analogue data set collected over East Antarctica in the 1970s by the Scott Polar Research Institute (SPRI), the US National Science Foundation (NSF) and the Technical University of Denmark (TUD). The data is geolocated and dated using the age-depth relationship of the ice cores from Lake Vostok and EPICA (see paper for details and source for calculated ages). The ages of the internal layers are spanning 17.5 kyr to 352.5 kyr BP (kilo years before 1950 A.D.).

The twelve layer ages in the SeparatedClusterCase_data.csv were obtained from the Vostok ice Core for layers 1, 2, 4, 6, 7, 8, 10 and from the EPICA ice core for layer 3, 5, 9, 11, 12 (see paper and auxiliary material for details).

For the CombinedClusterCase_data.csv the nine layers connect the Vostok and the EPICA regions with their ages by correlating the layers 2 & 3, 5 & 6, and 8 & 9 and using the average of the two connected layer ages (see paper and auxiliary material for details).

Data sets contain the following fields:

• x-coordinate (metres)
• y-coordinate (metres)
• normalised elevation of 9 layers (CombinedClusterCase), respectively 12 (SeparatedClusterCase) with 0 for the bed and 1 for the surface. The age for the respective layer is given above each column.
• elevation (metres above sea level) of 9 layers (CombinedClusterCase), respectively 12 (SeparatedClusterCase). The age for the respective layer is given above each column.
• bed elevation (metres above sea level, using BEDMAP 1)

Note: x and y coordinates are given in WGS 84 / Antarctic Polar Stereographic projection (EPSG: 3031) using -90 for latitude of projection origin and -71 for standard parallel.