Inventory of thermo-erosional valleys and streams in three ice-rich permafrost lowlands adjacent to the Laptev Sea, with links to maps in ArcGIS format

• Main Authors: Morgenstern, Anne, Grosse, Guido, Arcos, David Rico, Günther, Frank, Overduin, Pier Paul, Grigoriev, Mikhail N, Ulrich, Mathias, Spröte, Roland, Sandakov, Alexander
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: BuorKhayaPensinsula; Event label; File content; File size; Latitude of event; LEN; Lena Delta; Siberia; Russia; LenaDeltaRegion; Longitude of event; MamontovKlykRegion; MULT; Multiple investigations; Reference/source; Uniform resource locator/link to file; Buor-Khaya; Khaya; Laptev Sea; Arctic; Ice; laptev; lena delta; lena river; permafrost; Polar Research; The Cryosphere
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.833958; https://doi.org/10.1594/PANGAEA.833958

This dataset provides an inventory of thermo-erosional landforms and streams in three lowland areas underlain by ice-rich permafrost of the Yedoma-type Ice Complex at the Siberian Laptev Sea coast. It consists of two shapefiles per study region: one shapefile for the digitized thermo-erosional landforms and streams, one for the study area extent. Thermo-erosional landforms were manually digitized from topographic maps and satellite data as line features and subsequently analyzed in a Geographic Information System (GIS) using ArcGIS 10.0. The mapping included in particular thermo-erosional gullies and valleys as well as streams and rivers, since development of all of these features potentially involved thermo-erosional processes. For the Cape Mamontov Klyk site, data from Grosse et al. [2006], which had been digitized from 1:100000 topographic map sheets, were clipped to the Ice Complex extent of Cape Mamontov Klyk, which excludes the hill range in the southwest with outcropping bedrock and rocky slope debris, coastal barrens, and a large sandy floodplain area in the southeast. The mapped features (streams, intermittent streams) were then visually compared with panchromatic Landsat-7 ETM+ satellite data (4 August 2000, 15 m spatial resolution) and panchromatic Hexagon data (14 July 1975, 10 m spatial resolution). Smaller valleys and gullies not captured in the maps were subsequently digitized from the satellite data. The criterion for the mapping of linear features as thermo-erosional valleys and gullies was their clear incision into the surface with visible slopes. Thermo-erosional features of the Lena Delta site were mapped on the basis of a Landsat-7 ETM+ image mosaic (2000 and 2001, 30 m ground resolution) [Schneider et al., 2009] and a Hexagon satellite image mosaic (1975, 10 m ground resolution) [G. Grosse, unpublished data] of the Lena River Delta within the extent of the Lena Delta Ice Complex [Morgenstern et al., 2011]. For the Buor Khaya Peninsula, data from Arcos [2012], which had been digitized based ...