From CSIRO Marlin
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GIS Layer: Sea Surface Silicate in the Australian Region

Created 25/06/2025

Updated 25/06/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

ESRI grids showing silicate, linearly interpolated from CARS2000 mean and seasonal fields to 0.1 degree spaced grid, at depths of 0, 150, 500, 1000 and 2000 metres. The loess filter used to create CARS2000 resolves at each point a mean value and a sinusoid with 1 year period (and in some cases a 6 month period sinusoid - the "semi-annual cycle".) The provided "annual amplitude" is simply the magnitude of that annual sinusoid. CARS is a set of seasonal maps of temperature, salinity, dissolved oxygen, nitrate, phosphate and silicate, generated using Loess mapping from all available oceanographic data in the region. It covers the region 100-200E, 50-0S, on a 0.5 degree grid, and on 56 standard depth levels. Higher resolution versions are also available for the Australian continental shelf. The data was obtained from the World Ocean Atlas 98 and CSIRO Marine and NIWA archives. It was designed to improve on the Levitus WOA98 Atlas, in the Australian region. CARS2000 is derived from ocean cast data, which is always measured above the sea floor. However, for properties which do not change rapidly near the sea floor, this would not lead to a significant error. All the limitations of CARS2000 also apply here.

Files and APIs

Additional Info

Field Value
Title GIS Layer: Sea Surface Silicate in the Australian Region
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/854d261c-ac6f-4cc6-8175-b26db6d980f7
Contact Point
CSIRO Marlin Data Catalogue
data-requests-hf@csiro.au
Reference Period 01/01/1900 - 01/01/2000
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        110.0,
        -45.0
      ],
      [
        160.0,
        -45.0
      ],
      [
        160.0,
        0.0
      ],
      [
        110.0,
        0.0
      ],
      [
        110.0,
        -45.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal CSIRO Marlin

Data Source

This dataset was originally found on CSIRO Marlin "GIS Layer: Sea Surface Silicate in the Australian Region". Please visit the source to access the original metadata of the dataset:
https://marlin.csiro.au/geonetwork/srv/eng/csw/dataset/gis-layer-sea-surface-silicate-in-the-australian-region1