- Thumbnail
- Resource ID
- f66ebd76-dd78-11eb-8ce8-0242c0a82008
- Title
- Glacial trough geomorphic feature layer
- Date
- Feb. 5, 2014, midnight, Publication
- Abstract
- The glacial trough geomorphic feature layer represents the spatial extent of the glacial troughs of the worlds oceans based on interpretation of the SRTM30 plus v7 global bathymetry model. The layer is one of the 25 layers that make up the global seafloor geomorphic features map (Harris et.al. 2014). Shelf valleys at high latitudes incised by glacial erosion during the Pleistocene ice ages form elongate troughs, typically trending across the continental shelf and extending inland as fjord complexes (Hambrey, 1994). The largest of these features are glacial troughs, characterised by depths of over 100 m (often exceeding 1,000 m depth) and are distinguished from shelf valleys by an over-deepened longitudinal profile that reaches a maximum depth inboard of the shelf break, thus creating a perched basin on the shelf with an associated sill (Hambrey, 1994). Glacial troughs were digitized by hand based on 50 m contoured data for the Antarctic and 10 m contoured data for other shelf areas.
- Edition
- --
- Owner
- jcleary
- Point of Contact
- Collart
- tim.collart@seascapebelgium.be
- Purpose
- The glacial trough geomorphic feature layer represents the spatial extent of the glacial troughs of the worlds oceans based on interpretation of the SRTM30 plus v7 global bathymetry model. The layer is one of the 25 layers that make up the global seafloor geomorphic features map (Harris et.al. 2014). The global seafloor geomorphic features map is intended to support ocean management including feature inventories, spatial planning and biodiversity conservation.
- Maintenance Frequency
- None
- Type
- not filled
- Restrictions
- None
- no limitations on public access
- License
- Creative Commons Attribution 4.0 International
- Language
- eng
- Temporal Extent
- Start
- --
- End
- --
- Supplemental Information
- No information provided
- Data Quality
- --
- Extent
-
- x0: -180.000000000000000
- x1: 180.000000000000000
- y0: -78.601661682128900
- y1: 83.796089172363300
- Spatial Reference System Identifier
- EPSG:4326
- Keywords
- no keywords
- Category
- Oceans
- Regions
-
Global