GPR derived snow depth over A. P. Olsen Ice Cap (2008-2024)

This dataset contains ground-penetrating radar (GPR)-derived end-of-winter snow depths over A.P. Olsen Ice Cap for the period 2008–2024. GPR data were collected using a MALÅ Geoscience ProEx unit with 500 MHz (2008–2011) or 800 MHz (2012–2024) shielded antennas. Data were processed using the ReflexW-2D software package. Raw GPR data can be found in GPR_raw_2008_2024.zip. Processed GPR data, including ReflexW files, are available in GPR_processed_2008_2024.zip. The yyyy_GPR_snowdepth.txt files contain the picked reflection of the last summer surface (using ReflexW), converted to snow depths for each survey year. The variables are: ProfName: Profile Name TraceNr: GPR trace number as recorded along the profile lon: Longitude, degrees East (GPS coordinates recorded with handheld unit, interpolated) lat: Latitude, degrees North (GPS coordinates recorded with handheld unit, interpolated) Elev: Elevation, meters above sea level (GPS coordinates recorded with handheld unit, interpolated) X: Easting, kilometers, EPSG:3413 Y: Northing, kilometers, EPSG:3413 dist: Profile distance, meters twt: Two-way travel time to the picked reflector, nanoseconds depth: Snow depth, meters v_snow: Radar velocity used for time-to-depth conversion, m/ns rho_snow: Snow density used to calculate radar velocity, kg/m3 Amp: Amplitude of the picked reflector The yyyy_GPR_snowdepth_ds.txt files contain snow depth data downsampled to a 2 m interval for each survey year. 2008_2024_GPR_snowdepth_ds.txt contains all downsampled data from the years 2008–2024.