Citation:

PANGAEA.954991

Name: NC Greenland NG1: Three-dimensional stratigraphic Horizon in the Northern Central Greenland ice sheet (13.8 ka)
Published: 2023-06-23
License: https://creativecommons.org/licenses/by/4.0/
Keywords: ice flow; ice sheets; ice stream; IRH; Polar 6; radio-echo sounding

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Abstract:

The NG1 3D horizon is located in northern central Greenland and covers an area of approximately 690 x 55 km and reaches almost from the eastern to the western outlet systems. The age of NG1 is 13.8 ± 1.0 ka (thousand years). NG1 extends in the east into the NEGIS trunk and shows in this area similar short-wavelength folds, which are observed in the NEGIS shear margins. Furthermore, NG1 resembles several cylindrical upright folds in the eastern and western edges of the horizons. The fold axes of the cylindrical folds in the west trend approximately west, whereas the trend of the cylindrical folds in the east trend north. In the central-eastern area, we find a large bump in the bed topography due to the paleofluvial mega-canyon, which is imprinted in the 3D horizons mimicking this bed depression. In the central-west, we find cylindrical upright folds trending in two different directions (north and north-west).

Keyword(s):

ice flow; ice sheets; ice stream; IRH; Polar 6; radio-echo sounding

Coverage:

Latitude: 77.107000 * Longitude: -41.265000

Event(s):

NorthernCentralGreenland * Latitude: 77.107000 * Longitude: -41.265000 * Method/Device: (ARES) * Comment: Radar data by NASA Operation IceBridge & University of Kansas

Comment:

The 3D horizon and traced radar lines are provided in four different data formats:

1. ASCII format of the point cloud of the 3D horizons (meshes.dat) or traced radar lines (line.dat) in the xyz format, where x and y represent the coordinates and z the elevation in meters.

2. Digital Elevation Models (DEMs) in the GeoTIFF (.tif) and NetCDF (.nc) format of the 3D horizons (meshes). The DEMs have a cell size of 50 m.

3. GoCAD (Geological Objects: The 3D horizons (meshes) are stored in triangulated surfaces (.ts) and the traced radar lines as polylines (.pl).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	File type	File type		Bons, Paul D
2	File content	Content		Bons, Paul D	[Version][age (ka)][subset][geometry]
3	Binary Object	Binary		Bons, Paul D
4	Binary Object (Media Type)	Binary (Type)		Bons, Paul D
5	Binary Object (File Size)	Binary (Size)	Bytes	Bons, Paul D

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Basic curation (CurationLevelB)

Size:

18 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.

1 File type	2 Content	3 Binary	4 Binary (Type)	5 Binary (Size) [Bytes]
ASCII	V001_13_8_ka_lines	NC_Greenland_NG1_V001_13_8_ka_lines.dat	text/plain	6.1 MBytes
ASCII	V001_13_8_ka_mesh	NC_Greenland_NG1_V001_13_8_ka_mesh.dat	text/plain	1.7 GBytes
DEM	V001_13_8_ka_mesh	NC_Greenland_NG1_V001_13_8_ka_mesh.nc	application/x-netcdf	260.9 MBytes
DEM	V001_13_8_ka_mesh	NC_Greenland_NG1_V001_13_8_ka_mesh.tif	image/tiff	260.8 MBytes
GoCAD	V001_13_8_ka_lines	NC_Greenland_NG1_V001_13_8_ka_lines.pl	text/plain	6.8 MBytes
GoCAD	V001_13_8_ka_mesh	NC_Greenland_NG1_V001_13_8_ka_mesh.ts	text/plain	5.3 GBytes