Abstract:
We present a new gridded bathymetric compilation around Tristan da Cunha here defined by the following bounding box: 5 to 16.8W, 33 to 43.5S.
This bathymetry grid was compiled from a variety of multibeam swath bathymetry data acquired during 7 different cruises (see lineage). The data is available as a grid of 0.001 degrees resolution in three different formats: NetCDF, ArcView ASCII and GeoTIFF formats using geographic coordinates on the WGS84 datum.
This grid is an output of the UK FCDO 'Blue Belt' program and the following Natural Environment Research Council (NERC) BAS-ODA fundings: NE/R000107/1 and NE/T012439/1.
Keywords:
Bathymetry, Multibeam, Tristan da Cunha
Fremand, A., Pettafor, A., Evans, D., Howard, F., Morley, S., & Bell, J. (2021). Gridded bathymetric compilation of Tristan da Cunha from multibeam echosounder data collected by multiple vessels (1996-2019) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/181c6078-b470-4382-9425-bb8329e45d94
| Access Constraints: | None |
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| Use Constraints: | This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions: 1. To cite the data Fremand, A., Pettafor, A., Evans, D., Howard, F., Morley, S., & Bell, J. (2021). Gridded bathymetric compilation of Tristan da Cunha from multibeam echosounder data collected by multiple vessels (1996-2019) (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/181C6078-B470-4382-9425-BB8329E45D94 2. The user recognizes the limitations of data and will not use this data for navigation purposes. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data. NOT TO BE USED FOR NAVIGATION |
| Creation Date: | 2021-09-13 |
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| Dataset Progress: | Planned |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | PDC BAS |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Ms Alice C Fremand |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Ms Alison Pettafor |
| Role(s) | Investigator |
| Organisation | CEFAS |
| Name | Mr Floyd Howard |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Name | Mr Daniel Evans |
| Role(s) | Investigator |
| Organisation | UK Hydrographic Office |
| Name | Mr James Bell |
| Role(s) | Investigator |
| Organisation | CEFAS |
| Name | Dr Simon A Morley |
| Role(s) | Investigator |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | German cruises: - MSM24: o Wintersteller, Paul; Kammann, Janina; Strack, Anne; Geissler, Wolfram H (2021): Multibeam bathymetry processed data (EM 1002 echosounder entire dataset, MB-System data format) of RV MARIA S. MERIAN during cruise MSM24. PANGAEA, https://doi.org/10.1594/PANGAEA.928285 o Wintersteller, Paul; Kammann, Janina; Strack, Anne; Geissler, Wolfram H (2021): Multibeam bathymetry processed data (Kongsberg EM 122 entire dataset, MB-System data format) of RV MARIA S. MERIAN during cruise MSM24. PANGAEA, https://doi.org/10.1594/PANGAEA.928269 - MSM20/2: Wintersteller, Paul; Kammann, Janina; Strack, Anne; Geissler, Wolfram H (2021): Multibeam bathymetry processed data (EM 120 echosounder entire dataset, MB-System data format) of RV MARIA S. MERIAN during cruise MSM20/2. PANGAEA, https://doi.org/10.1594/PANGAEA.928266 US cruises: - KN145L17: Woods Hole Oceanographic Institution (WHOI) (1996): Multibeam collection for KN145L17: Multibeam data collected aboard Knorr from 04-Apr-96 to 08-May-96, Cape Town, South Africa to Montevideo, Uruguay. NOAA National Centers for Environmental Information. https://www.ngdc.noaa.gov/ships/knorr/KN145L17_mb.html - MV1203: Rolling Deck to Repository (R2R) (2012): Multibeam collection for MV1203: Multibeam data collected aboard Melville from 11-Feb-12 to 30-Mar-12, Cape Town, South Africa to Cape Town, South Africa. NOAA National Centers for Environmental Information.https://www.ngdc.noaa.gov/ships/melville/MV1203_mb.html UK cruises: - JR287 cruise report: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/jr287.pdf - JR17004 cruise report: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/jr17004.pdf |
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| Quality: | The data has been processed using different software including CARIS and MB-system. Final quality control was undertaken manually to remove any outliers in the source datasets. This involved cleaning much of the raw data using the "mbedit" program from MB-system. | |
| Lineage: | The bathymetry map was compiled from a variety of different data sources. The primary data are multibeam swath bathymetry collected from scientific cruises undertaken by British Antarctic Survey (BAS) but also German and US cruises. The complete list of the cruises used for the compilation is the following: -RRS James Clark Ross: JR287, JR17004 -RRS Discovery: DY100 -RV MARIA S. MERIAN: MSM20/2 and MSM24 -RV Melville: MV1203 -RV Knorr: KN145L17 The grid was created using the mbgrid program from MB-system version 5.7.6, using the parameters " -E0.001/0.001/degrees! -G4 -A2 -F1 -R-16.8/-5/-43.5/-33" for the Arc/Info and ArcView ASCII grid and " -E0.001/0.001/degrees! -G3 -A2 -F1 -R-16.8/-5/-43.5/-33" for the netCDF file (GMT version 2 GRD file) . This uses a Gaussian weighted mean filter. Bathymetry data is gridded as topography (positive upwards). |
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| Temporal Coverage: | |
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| Start Date | 1996-04-04 |
| End Date | 2019-04-01 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -43.5 |
| Northernmost | -33 |
| Longitude | |
| Westernmost | -16.8 |
| Easternmost | -5 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 100 meters - < 250 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | South Atlantic Ocean |
| Detailed Location | Tristan da Cunha |
| Sensor(s): |
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| Source(s): |
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| Data Collection: | Data collected from the following cruises: -RRS James Clark Ross: JR287, JR17004 -RRS Discovery: DY100 -RV MARIA S. MERIAN: MSM20/2 and MSM24 -RV Melville: MV1203 -RV Knorr: KN145L17 |
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 1.4 GB |
| Distribution Format | netCDF |
| Fees | N/A |
| Data Storage: | This dataset constains 3 files: - Tristan_001d.asc ~940 MB - Tristan_001d.grd ~480 MB - Tristan.zip (contains the GeoTIFF files) ~27 MB |