Abstract
Abstract. Here we present a comprehensive dataset of glacial geomorphological features covering an area of 65 000 km2 in central west Poland, located along the southern sector of the last Scandinavian Ice Sheet, within the limits of the Baltic Ice Stream Complex. The GIS dataset is based on mapping from a 0.4 m high-resolution digital elevation model derived from airborne light detection and ranging data. Ten landform types have been mapped: mega-scale glacial lineations, drumlins, marginal features (moraine chains, abrupt margins, edges of ice-contact fans), ribbed moraines, tunnel valleys, eskers, geometrical ridge networks, and hill–hole pairs. The map comprises 5461 individual landforms or landform parts, which are available as vector layers in GeoPackage format at https://doi.org/10.5281/zenodo.4570570 (Szuman et al., 2021a). These features constitute a valuable data source for reconstructing and modelling the last Scandinavian Ice Sheet extent and dynamics from the Middle Weichselian Scandinavian Ice Sheet advance, 50–30 ka, through the Last Glacial Maximum, 25–21 ka, and Young Baltic advances, 18–15 ka. The presented data are particularly useful for modellers, geomorphologists, and glaciologists.
Highlights
Present-day ice sheet mass loss is a key driver of global average sea-level rise (Rignot et al, 2019)
Geomorphological mapping is a powerful tool for reconstructing the glacial history of formerly glaciated areas (Clark, 1997; Kleman et al, 1997; Kjær et al, 2003), especially where in situ dating results are too sparse to reproduce highly dynamic ice sheet behaviour
These data can be used to reconstruct basal conditions, the pattern and style of retreat, and ice flow dynamics during previous glaciations. It can be integrated with data from other areas of the Scandinavian Ice Sheet (SIS) to improve palaeo-glaciological reconstructions. This area is of particular interest as it was at the southernmost limit of the Baltic Ice Stream Complex (BISC), which was highly active during the last glaciation and a key control governing SIS drainage and collapse (Patton et al, 2017)
Summary
Present-day ice sheet mass loss is a key driver of global average sea-level rise (Rignot et al, 2019). In this paper we use a new high-resolution digital elevation model to produce a comprehensive, high-quality, geospatial dataset containing updated and newly discovered glacial landforms along the Polish southern sector of the SIS These data can be used to reconstruct basal conditions, the pattern and style of retreat, and ice flow dynamics during previous glaciations. This area is of particular interest as it was at the southernmost limit of the BISC, which was highly active during the last glaciation and a key control governing SIS drainage and collapse (Patton et al, 2017) These data can be used as a valuable source of information on the behaviour of terrestrially terminating ice streams that have no contemporary analogues
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