Geomophologic features (fractures, canyons, seamounts) on the North Atlantic

Distribution of three geomorphologic features (fracture zones, canyons, and seamounts) on the North Atlantic (18°N to 76°N and 36°E to 98°W). Source vector data originated from the GEBCO Gazetteer of Undersea Features Names for fractures, Harris & Whiteway (2011) for canyons, and Yesson et al. (2011) for seamounts. The presence (value=1) of fracture zones or seamounts and the total length of canyons (in km, independently for shelf-incising or blind canyons) was extracted in 25km * 25km gridsquares.

This dataset was built to feed a basin-wide spatial conservation planning exercise, targeting the deep sea of the North Atlantic. The goal of this approach was to identify conservation priority areas for Vulnerable Marine Ecosystems (VMEs) and deep fish species, based on the distribution of species and habitats, human activities and current spatial management.

Date (Publication): 2019-08-14

Identifier: FR-330-715-368-00032-IFR_MARBEC_ATLAS_Geomorpho

Identifier: DOI:10.12770/66c5957b-6cb5-4fce-9ca5-1cb609fa39b5

Credit: Horizon 2020 ATLAS project (EU)

Author

IFREMER - Combes Magali

Author

IFREMER - Vaz Sandrine

Station de Sète - Avenue Jean Monnet - CS 30171 - 34203 Sète Cedex , Sete , France

Publisher

IFREMER -

Thèmes Sextant

/Physical Environment/Geology/Geomorphology

GEMET - INSPIRE themes, version 1.0

Geology

Use limitation: CC-BY-NC-SA (Creative Commons - Attribution, Pas d’utilisation commerciale, Partage dans les mêmes conditions)

Access constraints: License

Use constraints: License

Spatial representation type: Grid

Distance: 25 km

Metadata language: English

Character set: UTF8

Topic category

Oceans
Environment

Reference system identifier: +proj=aea +lat_1=43 +lat_2=62 +lat_0=30 +lon_0=-30 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs +ellps=WGS84 +towgs84=0,0,0

Number of dimensions: 2

Dimension name: Row

Dimension size: 273

Resolution: 25 km

Dimension name: Column

Dimension size: 491

Resolution: 25 km

Cell geometry: Area

Transformation parameter availability: No

OnLine resource: IFR_MARBEC_ATLAS_BLIND_CANYONS_NORTHATL ( OGC:WMS )
Blind canyons - North Atlantic

Protocol: COPYFILE

Name: IFR_MARBEC_ATLAS_BLIND_CANYONS_NORTHATL

Description: Blind canyons - North Atlantic

OnLine resource: Yesson, C., Clark, M. R., Taylor, M. L., & Rogers, A. D. (2011). The global distribution of seamounts based on 30 arc seconds bathymetry data. Deep Sea Research Part I: Oceanographic Research Papers, 58(4), 442–453. https://doi.org/10/d8g2c6 ( WWW:LINK )

OnLine resource: Harris, P. T., & Whiteway, T. (2011). Global distribution of large submarine canyons: Geomorphic differences between active and passive continental margins. Marine Geology, 285(1–4), 69–86. https://doi.org/10/bjnm2f ( WWW:LINK )

OnLine resource: IHO-IOC (2019) GEBCO Gazetteer of Undersea Feature Names, www.gebco.net ( WWW:LINK )

OnLine resource: IFR_MARBEC_ATLAS_SHELF_INCISING_CANYONS_NORTHATL ( OGC:WMS )
Shelf-incising canyons - North Atlantic

Protocol: COPYFILE

Name: IFR_MARBEC_ATLAS_SHELF_INCISING_CANYONS_NORTHATL

Description: Shelf-incising canyons - North Atlantic

OnLine resource: IFR_MARBEC_ATLAS_FRACTURES_CANYONS_NORTHATL ( OGC:WMS )
Fracture zones - North Atlantic

Protocol: COPYFILE

Name: IFR_MARBEC_ATLAS_FRACTURES_CANYONS_NORTHATL

Description: Fracture zones - North Atlantic

OnLine resource: IFR_MARBEC_ATLAS_SEAMOUNTS_NORTHATL ( OGC:WMS )
Seamounts - North Atlantic

Protocol: COPYFILE

Name: IFR_MARBEC_ATLAS_SEAMOUNTS_NORTHATL

Description: Seamounts - North Atlantic

OnLine resource: DOI of the dataset ( WWW:LINK-1.0-http--metadata-URL )
DOI of the dataset

Hierarchy level: Dataset

Conformance result

Date (Publication): 2010-12-08

Explanation: See the referenced specification

Statement: Source vector data originated from the GEBCO Gazetteer of Undersea Features Names for fractures (IHO-IOC 2019), Harris & Whiteway (2011) for canyons, and Yesson et al. (2011) for seamounts. The data was extracted in 25km * 25 km gridsquares of the raster grid used for the ATLAS spatial prioritization. Source data reference: Harris, P. T., & Whiteway, T. (2011). Global distribution of large submarine canyons: Geomorphic differences between active and passive continental margins. Marine Geology, 285(1–4), 69–86. https://doi.org/10/bjnm2f ; IHO-IOC (2019) GEBCO Gazetteer of Undersea Feature Names, www.gebco.net ; Yesson, C., Clark, M. R., Taylor, M. L., & Rogers, A. D. (2011). The global distribution of seamounts based on 30 arc seconds bathymetry data. Deep Sea Research Part I: Oceanographic Research Papers, 58(4), 442–453. https://doi.org/10/d8g2c6 ;

Description: Source vector data originated from the GEBCO Gazetteer of Undersea Features Names (www.gebco.net) for fractures, Harris & Whiteway (2011) for canyons ( https://doi.org/10/bjnm2f ), and Yesson et al. (2011) for seamounts (https://doi.org/10/d8g2c6). Fractures and canyons data consisted in spatial lines, and seamounts in spatial points. The canyons dataset gathered three types of canyons: shelf-incising canyons having heads with a clear bathymetric connection to a major river system; shelf-incising canyons with no clear bathymetric connection to a major river system; and blind canyons incised onto the continental slope. The two types of shelf-incising canyons were pooled together.

Rationale: initial datasets sources and filtering

Description: Using the R environment, the rasterize function was used to extract the presence (fractures and seamounts) and the total length of canyons (in km), for shelf-incising canyons and for blind canyons, in 25km *25km gridsquares. Values of output raster cells where no fracture, seamounts or canyons were present were set to 0, while values of cells out of the study zone were set to NA.