Basal roughness in East Antarctica ...

• Main Authors: Winter, Anna, Eisen, Olaf, Kleiner, Thomas, Humbert, Angelika, Steinhage, Daniel
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Antarctica; bedrock; Radar Data; radio-echo sounding; Binary Object; Binary Object File Size; Multiple investigations; Antarctic; East Antarctic Ice Sheet; East Antarctica; Eta; Antarc*; Ice Sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.930525; https://doi.pangaea.de/10.1594/PANGAEA.930525

We provide a data set to investigate the subglacial properties of the East Antarctic Ice Sheet by statistically analysing the roughness of the bed topography, inferred from radio-echo sounding measurements. We analyse two sets of roughness parameters, one derived in the spatial and the other in the spectral domain, with two roughness parameters each. This enables us to compare the suitability of the four roughness parameters to classify the subglacial landscapes below the ice sheet. ... : Basal motion of ice sheets depends in part on the roughness and material properties of the subglacial bed and the occurrence of water. Here we present the data set used in Eisen et al., 2020, to investigate the subglacial properties of the East Antarctic Ice Sheet by statistically analysing theroughness of the bed topography, inferred from radio-echo sounding measurements. We present two sets of roughness parameters, one derived in the spatial and the other in the spectral domain, with two roughness parameters each.From our analysis in the spectral domain, we obtain two parameters:(1) The vertical roughness ξ, which quantifies the vertical variation of the basal topography (termed br for "basal roughness" in the data files); and(2) The parameter η (eta), which is a measure for the horizontal variation of the basal topography, with high values corresponding to a dominance of long wavelengths. From the analysis in the spatial domain, we derive a second set of two parameters:(3) The RMS deviation ν (nu), also ...