1221bbbd-843e-46d6-b96c-9c559aecfb20 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2020-04-02 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Gridded bathymetric compilation of selected areas within the Orkney Passage, Scotia Sea from multibeam echosounder data collected by multiple vessels (1989 - 2017) 2020-04-02 creation 2020-04-02 revision 2020-04-02 publication 2020-04-02 released 1.0 https://doi.org/10.5285/1221bbbd-843e-46d6-b96c-9c559aecfb20 doi GB/NERC/BAS/PDC/01317 https://data.bas.ac.uk/ NE/K012843/1 award NE/N018095/1 award Please cite this item as: Abrahamsen, E. (2020). Gridded bathymetric compilation of selected areas within the Orkney Passage, Scotia Sea from multibeam echosounder data collected by multiple vessels (1989 - 2017) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/1221bbbd-843e-46d6-b96c-9c559aecfb20 We present two new gridded bathymetric compilations of the Orkney Passage, Scotia Sea here defined by the following bounding boxes: 39.1 to 39.6 W, 60.55 to 60.7 S and 41.7 to 42.6 W, 60.45 to 60.8 S. These bathymetry grids were compiled from a variety of multibeam swath bathymetry data acquired during 12 different cruises (see lineage). The data is available as grids of 50 m resolution in a GMT-compatible (2-D) NetCDF format using geographic coordinates on the WGS84 datum. This grid was compiled in support of the ongoing monitoring efforts in and around Orkney Passage as part of the Ocean Regulation of Climate by Heat and Carbon Sequestration and Transports (ORCHESTRA) programme and preceding BAS NC projects, and the Dynamics of the Orkney Passage Outflow (DynOPO) project. Funding was provided by the NERC grants NE/K012843/1 and NE/N018095/1 as well as national capability No credit. completed Abrahamsen, E. Povl British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Bathymetry Multibeam Orkney Passage Scotia Sea theme Scotia Sea Antarctica Orkney Passage Antarctica place Oceanographic geographical features theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions: 1. To cite the data Abrahamsen, E. P. (2020). Gridded bathymetric compilation of selected areas within the Orkney Passage, Scotia Sea from multibeam echosounder data collected by multiple vessels (1989 - 2017) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/1221BBBD-843E-46D6-B96C-9C559AECFB20 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. doi doi crossReference doi doi crossReference url url crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url largerWorkCitation url url largerWorkCitation url url dependency url url crossReference textTable eng utf8 elevation geoscientificInformation oceans -42.6 -41.7 -60.8 -60.45 1987-01-01 2017-12-31 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor application/x-hdf application/x-hdf bytes 4194304 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=1221bbbd-843e-46d6-b96c-9c559aecfb20 WWW:LINK-1.0-http--link Get Data Download data download bytes 4194304 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=1221bbbd-843e-46d6-b96c-9c559aecfb20 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: 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), Alfred Wegener Institute (AWI), or acquired during ESPS RV Hesperides expeditions. The complete list of the cruises used for the compilation is the following: -RV Polarstern: ANT-VIII/5, ANT-XXII/4, ANT-XXIII/7 -RRS James Clark Ross: JR149, JR239, JR252, JR257/272A, JR259, JR281, JR310, JR16005 -ESPS RV Hesperides: hes97 The first grid (m41_swath_50m_nc.grd) was created using the mbgrid program from MB-system version 5.5.2336 , using the parameters "-E50/50/meters -R-39.6/-39.1/-60.7/-60.55 -G3 -A2 -T25 -W4 -M -N -C5/1 -P1 -F1 -V". This uses a Gaussian weighted mean filter. Values are interpolated using a spline (tension 25) up to five grid cells from the nearest data point only if additional data are found in two opposite directions. The second grid (m42-44_swath_50m_nc.grd) was created using the mbgrid program from MB-system version 5.5.2336, using the parameters "-E50/50/meters -R-42.6/-41.7/-60.8/-60.45 -G3 -A2 -T25 -W4 -M -N -C5/1 -P1 -F1 -V". Like the first grid, this uses a Gaussian weighted mean filter. Values are interpolated using a spline (tension 25) up to five grid cells from the nearest data point only if additional data are found in two opposite directions. Data quality: 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. For data processed in this way, edit files have been submitted to the Polar Data Centre. In source files that were ingested as text files, outliers were manually removed. To verify the accuracy of the resulting dataset, bottom depths were compared against CTD casts on cruise JR16005, excluding casts that were performed when the ship was moving and those where the CTD did not get within altimeter range of the bottom. Bottom depths were calculated from the CTD altimeter when near the bottom, and these were compared against the gridded dataset. On 81 casts, the median difference between the CTD-derived depths and gridded depths was 4.1 m with a standard deviation of 18.9 m. This compares favourably with GEBCO_2014, which had a median offset of 4.6 m with a standard deviation of 73.4 m, and GEBCO_2019, which has a median offset of 0.5 m but a standard deviation of 89.4 m. asNeeded completed