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

browse graphicImage of total sediment thickness of the world's oceans and marginal seas, Version 2
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 G?li 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.

Cite this dataset when used as a source.

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Distribution Formats
  • netCDF (Version: 2)
    • File Compression: gzip
  • ASCII xyz (Version: 2)
    • File Compression: zip
  • geotiff (Version: 2)
    • File Compression: zip
  • ArcGIS (Version: 2)
    • File Compression: zip
Distributor DOC/NOAA/NESDIS/NGDC - National Geophysical Data Center
Point of Contact Joanne Whittaker
Institute for Marine and Antarctic Studies, University of Tasmania
+61 (0) 3 6226 6367
jo.whittaker@utas.edu.au
Associated Resources
  • Global Sediment Thickness Dataset updated for the Australian-Antarctic Southern Ocean
Originator
  • Joanne Whittaker
    Institute for Marine and Antarctic Studies, University of Tasmania
Publisher
    Publisher information not available.
Date(s)
  • publication: 2013-05-20
Edition: Version 2
Data Presentation Form: Digital model - multi-dimensional digital representation of a feature, process, etc.
Dataset Progress Status Complete
Data Update Frequency: As needed
Purpose: To update NGDC's global sediment-thickness database for use by researchers and interested public.
Use Limitations
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Time Period: 2003-12-31  to  2013-05-20
Spatial Bounding Box Coordinates:
N: 80.0000
S: -70.0000
E: 360
W: 0
Spatial Coverage Map:
Themes
  • EARTH SCIENCE>OCEANS>Marine Sediments
  • Sediment Thickness
  • H : 1 km - < 10 km or approximately .01 degree - < .09 degree
  • V : 1 meter - < 10 meters
Places
  • Ocean>Atlantic Ocean
  • Ocean>Indian Ocean
  • Ocean>Pacific Ocean
  • Ocean>Southern Ocean
  • Vertical Location>Sea Floor
Use Constraints
  • Use Constraints: None
Access Constraints
  • Access Constraints: None
Fees
  • None
Source Datasets
  • Thermal regime of the Southeast Indian Ridge between 88?E and 140?E: Remarks on the subsidence of the ridge flanks
    • Description of Source: Thermal regime of the Southeast Indian Ridge between 88?E and 140?E: Remarks on the subsidence of the ridge flanks
  • Geological framework of the continental margin in the region of the Australian Antarctic Territory
    • Description of Source: Geological framework of the continental margin in the region of the Australian Antarctic Territory
  • A revised structural framework for frontier basins on the southern and southwestern Australian continental margin
    • Description of Source: A revised structural framework for frontier basins on the southern and southwestern Australian continental margin
  • Nature of the continent-ocean transition on the non-volcanic rifted margin in the central Great Australian Bight
    • Description of Source: Nature of the continent-ocean transition on the non-volcanic rifted margin in the central Great Australian Bight
Lineage Statement Lineage statement not available.
Processing Steps
  • We compute new, regional 5-minute resolution sediment thickness grids using seismic reflection and refraction derived sediment thicknesses for the southern Australian and conjugate Antarctic Wilkes Land margins, merged with sediment thickness data from G?li et al. (2007) for the intervening abyssal plains. Values from the NGDC global sediment thickness grid (Divins, 2004) were used for areas not covered by the other data sets.

Metadata Last Modified: 2013-05-30

For questions about the information on this page, please email: jo.whittaker@utas.edu.au