Morgenstern, Anne; Grosse, Guido; Arcos, David Rico; Günther, Frank; Overduin, Pier Paul; Grigoriev, Mikhail N; Ulrich, Mathias; Spröte, Roland; Sandakov, Alexander (2014): 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. Alfred Wegener Institute - Research Unit Potsdam, PANGAEA, https://doi.org/10.1594/PANGAEA.833958
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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. , 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resolution) [Schneider et al., 2009] and a Hexagon satellite image mosaic (1975, 10 m ground resolution) [G. Grosse, unpublished data] of the Lena River Delta within the extent of the Lena Delta Ice Complex [Morgenstern et al., 2011].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 , which had been digitized based on RapidEye satellite data (8 August 2010, 6.5 m ground resolution), were completed for smaller thermo-erosional features using the same RapidEye scene as a mapping basis. The spatial resolution, acquisition date, time of the day, and viewing geometry of the satellite data used may have influenced the identification of thermo-erosional landforms in the images. For Cape Mamontov Klyk and the Lena Delta, thermo-erosional features were digitized using both Hexagon and Landsat data; Hexagon provided higher resolution and Landsat provided the modern extent of features. Allowance of up to decameters was made for the lateral expansion of features between Hexagon and Landsat acquisitions (between 1975 and 2000).
Source data set:
Arcos, David Rico (2012): Classification of periglacial landforms based on high resolution multispectral remote sensing data. A contribution to the landscape description of the north Siberian Buor Khaya Pensinsula. Diploma Thesis, University of Potsdam, Germany
Grosse, Guido; Schirrmeister, Lutz; Malthus, Timothy J M (2006): Application of Landsat-7 satellite data and a DEM for the quantification of thermokarst-affected terrain types in the periglacial Lena–Anabar coastal lowland. Polar Research, 25(1), 51-67, https://doi.org/10.1111/j.1751-8369.2006.tb00150.x
Morgenstern, Anne; Grosse, Guido; Günther, Frank; Fedorova, Irina; Schirrmeister, Lutz (2011): Spatial analyses of thermokarst lakes and basins in Yedoma landscapes of the Lena Delta. The Cryosphere, 5(4), 849-867, https://doi.org/10.5194/tc-5-849-2011
Schneider, Julia; Grosse, Guido; Wagner, Dirk (2009): Land cover classification of tundra environments in the Arctic Lena Delta based on Landsat 7 ETM+ data and its application for upscaling of methane emissions. Remote Sensing of Environment, 113(2), 380-391, https://doi.org/10.1016/j.rse.2008.10.013
Median Latitude: 72.833333 * Median Longitude: 125.366667 * South-bound Latitude: 71.600000 * West-bound Longitude: 117.000000 * North-bound Latitude: 73.500000 * East-bound Longitude: 132.700000
BuorKhayaPensinsula * Latitude: 71.600000 * Longitude: 132.700000 * Location: Siberia, Russia * Method/Device: Multiple investigations (MULT)
LenaDeltaRegion (LEN) * Latitude: 73.400000 * Longitude: 126.400000 * Location: Lena Delta, Siberia, Russia
- Geospatial data presentation form: vector data- Native data set environment: ESRI ArcINFO- Access instructions: GIS application needed for viewing files
24 data points