Total Sediment Thickness of the World's Oceans & Marginal Seas, Version 2

Description

NGDC's global ocean sediment thickness grid (Divins, 2003) has been updated for the Australian-Antarctic region (60° -155° E, 30° -70° S). New seismic reflection and refraction data have been used to add detail to the conjugate Australian and Antarctic margins and intervening ocean floor where previously regional sediment thickness patterns were poorly known. On the margins, sediment thickness estimates were computed from velocity-depth functions from sonobuoy/refraction velocity solutions ground-truthed against seismic reflection data. For the Southeast Indian Ridge abyssal plain, sediment thickness contours from Géli et al. (2007) were used. The new regional sediment thickness grid was combined with NGDC's original ocean sediment thickness grid (Divins, 2003) to create an updated global grid of ocean sediment thickness. Even using the minimum estimates, sediment accumulations on the extended Australian and Antarctic continental margins are 2 km thicker across large regions and up to 9 km thicker in the Ceduna Basin compared to NGDC's original sediment thickness grid (Divins, 2003), which has been deprecated but is still available.

Resources

Name Format Description Link
0 GMT NetCDF grd file https://www.ngdc.noaa.gov/mgg/sedthick/data/version2/gmt_netcdf/sedthick_world_v2.grd.gz
57 geotiff https://www.ngdc.noaa.gov/mgg/sedthick/data/version2/geotiff/sedthick_world_v2_geotiff.zip
57 ArcGIS https://www.ngdc.noaa.gov/mgg/sedthick/data/version2/arcgis/sedthick_world_v2_arc.zip
57 ASCII xyz https://www.ngdc.noaa.gov/mgg/sedthick/data/version2/xyz/sedthick_world_v2_xyz.zip
0 web access to Total Sediment Thickness of the World's Oceans & Marginal Seas, Version 2 https://www.ngdc.noaa.gov/mgg/sedthick/
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 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. https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords
0 Journal article describing the Global sediment thickness dataset updated for the Australian-Antarctic Southern Ocean http://dx.doi.org/10.1002/ggge.20181

Tags

  • vertical location
  • nesdis
  • sediment thickness
  • southern ocean
  • oceans
  • marine sediments
  • national geophysical data center
  • noaa
  • atlantic ocean
  • u.s. department of commerce
  • earth science
  • doc/noaa/nesdis/ngdc
  • indian ocean
  • ocean
  • doc/noaa/nesdis/ncei
  • sea floor
  • v : 1 meter - < 10 meters
  • h : 1 km - < 10 km or approximately .01 degree - < .09 degree
  • pacific ocean
  • national centers for environmental information

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Categories