Lagunova, Nadezhda; Miramontes, Elda; Schwenk, Tilmann; Spieß, Volkhard; Bohrmann, Gerhard: Global morphological characterisation of modern asymmetric submarine channels [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.988633 (dataset in review)
Abstract:
This dataset provides a global morphometric characterisation of 24 modern (non-buried) asymmetric submarine channels from 15 locations worldwide. Morphometric measurements were performed on bathymetric maps automatically using Python script to support consistency. For each channel, multiple cross-sections were extracted along the thalweg, and a suite of parameters was calculated for each cross-section, including: width, left and right widths, width symmetry, relief, left and right margin relief, relief symmetry, water depth, slope along the thalweg, sinuosity, local sinuosity, straight length of channel, length along thalweg, relief-to-width ratio (R/W), latitude, and slope angles of channel margins. The dataset also documents the sources and resolution of bathymetric data used in the calculations, ensuring transparency and reproducibility. This dataset provides a basis for global comparative analyses of channel asymmetry, supports evaluation of processes shaping deep-sea channel evolution, and offers reference data for modelling sediment transport and channel development. This compilation aims to support geomorphic, sedimentological, and marine geoscience research by providing the first coordinated global dataset of asymmetry metrics for submarine channels.
Keyword(s):
Related to:
Lagunova, Nadezhda (2025): GitHub - lemniskata08/Submarine_channels_morphometry: Automatic extraction of thalweg and margins (levees) line and morphological parameters measurements [webpage]. GitHub repository, https://github.com/lemniskata08/Submarine_channels_morphometry
Source:
Warnke, Fynn; Schwenk, Tilmann; Miramontes, Elda; Spieß, Volkhard; Wenau, Stefan; Bozzano, Graziella; Baqués, Michele; Kasten, Sabine (2023): Multibeam bathymetry processed data (Kongsberg EM122 working area dataset) of RV SONNE during cruise SO260/1, Argentine Continental Margin [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.938459
Wintersteller, Paul; Klaucke, Ingo (2016): Gridded bathymetry from multibeam echosounder EM122 data of the cruise MSM34/1 (2013) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.860483
Wintersteller, Paul; Kramer, Laura (2019): Gridded bathymetry from EM122 multibeam echosounder of RV Sonne cruise SO266 (offshore SW Taiwan) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.900980
Funding:
German Research Foundation (DFG), grant/award no. 509877600: Submarine gravity flows entrained by ocean circulation: Processes and related sedimentary products – SWEPT
Coverage:
Median Latitude: 13.358044 * Median Longitude: 137.524679 * South-bound Latitude: -90.000000 * West-bound Longitude: 28.058600 * North-bound Latitude: 90.000000 * East-bound Longitude: -54.000000
Date/Time Start: 2013-12-09T00:00:00 * Date/Time End: 2018-11-18T00:00:00
Minimum DEPTH, water: -5120.0000000 m * Maximum DEPTH, water: -199.9492188 m
Event(s):
GlobCover * Latitude Start: 90.000000 * Longitude Start: -180.000000 * Latitude End: -90.000000 * Longitude End: 180.000000
MSM34/1-track * Latitude Start: 43.140100 * Longitude Start: 28.058600 * Latitude End: 43.140100 * Longitude End: 28.058600 * Date/Time Start: 2013-12-09T00:00:00 * Date/Time End: 2013-12-27T00:00:00 * Campaign: MSM34/1 * Basis: Maria S. Merian * Method/Device: Underway cruise track measurements (CT) * Comment: Varna - Varna
SO260/1_0_Underway-4 * Latitude: -38.000000 * Longitude: -54.000000 * Date/Time Start: 2018-01-12T00:00:00 * Date/Time End: 2018-01-30T00:00:00 * O2A Registry URI: https://registry.o2a-data.de/items/7519 * Campaign: SO260/1 * Basis: Sonne_2 * Method/Device: KONGSBERG EM122 (KEM122)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Lagunova, Nadezhda | |||
| 2 | Name | Name | Lagunova, Nadezhda | see reference(s) | Channel name | |
| 3 | Name | Name | Lagunova, Nadezhda | see reference(s) | Cross-section name | |
| 4 | Projection | Projection | Lagunova, Nadezhda | see reference(s) | ||
| 5 | Data source | Data source | Lagunova, Nadezhda | see reference(s) | Bathymetry data | |
| 6 | Resolution | Resolution | Lagunova, Nadezhda | see reference(s) | Bathymetry resolution, m | |
| 7 | Cartesian coordinate, x | x | m | Lagunova, Nadezhda | see reference(s) | Thalweg X coordinate |
| 8 | Cartesian coordinate, y | y | m | Lagunova, Nadezhda | see reference(s) | Thalweg Y coordinate |
| 9 | Width | w | m | Lagunova, Nadezhda | see reference(s) | |
| 10 | Width | w | m | Lagunova, Nadezhda | see reference(s) | Left width |
| 11 | Width | w | m | Lagunova, Nadezhda | see reference(s) | Right width |
| 12 | Symmetry | Sym | Lagunova, Nadezhda | see reference(s) | Width symmetry | |
| 13 | Relief, mean | Relief mean | m | Lagunova, Nadezhda | see reference(s) | |
| 14 | Relief, mean | Relief mean | m | Lagunova, Nadezhda | see reference(s) | Left margin relief |
| 15 | Relief, mean | Relief mean | m | Lagunova, Nadezhda | see reference(s) | Right margin relief |
| 16 | Symmetry | Sym | Lagunova, Nadezhda | see reference(s) | Relief symmetry | |
| 17 | DEPTH, water | Depth water | m | Lagunova, Nadezhda | see reference(s) | Geocode |
| 18 | Slope angle | Slope angle | deg | Lagunova, Nadezhda | see reference(s) | Slope angle along thalweg |
| 19 | Sinuosity | S | Lagunova, Nadezhda | see reference(s) | ||
| 20 | Sinuosity | S | Lagunova, Nadezhda | see reference(s) | Local sinuosity | |
| 21 | Length | l | m | Lagunova, Nadezhda | see reference(s) | Straight length of channel |
| 22 | Length | l | m | Lagunova, Nadezhda | see reference(s) | Length along thalweg |
| 23 | Relief/Width ratio | R/W | Lagunova, Nadezhda | see reference(s) | ||
| 24 | LATITUDE | Latitude | Lagunova, Nadezhda | see reference(s) | Geocode | |
| 25 | Slope angle | Slope angle | deg | Lagunova, Nadezhda | see reference(s) | Slope angle of left margin |
| 26 | Slope angle | Slope angle | deg | Lagunova, Nadezhda | see reference(s) | Slope angle of right margin |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
25574 data points
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