Total Sediment Thickness of the World's Oceans & 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.

Data and Resources

Field Value
accessLevel public
accrualPeriodicity irregular
bureauCode {006:48}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier gov.noaa.ngdc.mgg.geophysics:G01065_v2
language {en-US}
modified 2013-05-20
old-spatial {"type": "Polygon", "coordinates": [[[0.0, -70.0], [360.0, -70.0], [360.0, 80.0], [0.0, 80.0], [0.0, -70.0]]]}
programCode {006:059}
publisher Institute for Marine and Antarctic Studies, University of Tasmania (Point of Contact)
resource-type Dataset
source_datajson_identifier true
source_hash c734b4ae5d7ba739c97e9dcc27f1071a48e3c870
source_schema_version 1.1
spatial {"type": "Polygon", "coordinates": [[[0.0, -70.0], [360.0, -70.0], [360.0, 80.0], [0.0, 80.0], [0.0, -70.0]]]}
temporal 2003-12-31T00:00:00/2013-05-20T00:00:00
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • ckan
  • doc-noaa-nesdis-ncei-national-centers-for-environmental-information
  • doc-noaa-nesdis-ngdc-national-geophysical-data-center
  • earth-scienceoceansmarine-sediments
  • geo
  • geoss
  • h-1-km-10-km-or-approximately-01-degree-09-degree
  • national
  • nesdis
  • noaa
  • north-america
  • oceanatlantic-ocean
  • oceanindian-ocean
  • oceanpacific-ocean
  • oceansouthern-ocean
  • sediment-thickness
  • u-s-department-of-commerce
  • united-states
  • v-1-meter-10-meters
  • vertical-locationsea-floor
isopen False
license_id notspecified
license_title License not specified
maintainer Joanne Whittaker
maintainer_email jo.whittaker@utas.edu.au
metadata_created 2025-11-22T22:11:40.074313
metadata_modified 2025-11-22T22:11:40.074317
notes 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.
num_resources 9
num_tags 22
title Total Sediment Thickness of the World's Oceans & Marginal Seas, Version 2