From Australian Oceans Data Network
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Antarctic marginal ice zone width data from AltiKa

Created 17/04/2026

Updated 17/04/2026

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These data underpin the Fraser et al., 2026 publication in Nature Communications: "Revealing the Antarctic marginal ice zone: a decade-long wave-in-ice climatology". They are presented as one .csv file per year, each containing around 8500-9000 rows. Each row corresponds to the data retrieved from a SARAL half-orbit (pole to pole). Each row presents the along-track summary fields used to estimate the wave-affected marginal ice zone width. The marginal ice zone width is estimated from the difference in latitude between the ice edge and the latitude of the "inner MIZ limit". The inner MIZ limit is estimated from AltiKa Ka-band radar altimeter waveforms: where the waveform of returned power becomes suffiently peaky and "steep", we interpret this as being the point where wave passage becomes undetectable.

Files and APIs

Additional Info

Field Value
Title Antarctic marginal ice zone width data from AltiKa
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/2f28c4e1-a60d-4d5a-a3df-8a0bdbfc1efa
Contact Point
Australian Ocean Data Network
adfraser@utas.edu.au
Reference Period 14/03/2014
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        -180.0,
        -78.0
      ],
      [
        180.0,
        -78.0
      ],
      [
        180.0,
        -50.0
      ],
      [
        -180.0,
        -50.0
      ],
      [
        -180.0,
        -78.0
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Australian Oceans Data Network

Data Source

This dataset was originally found on Australian Oceans Data Network "Antarctic marginal ice zone width data from AltiKa". Please visit the source to access the original metadata of the dataset:
https://catalogue.aodn.org.au/geonetwork/srv/eng/csw/dataset/antarctic-marginal-ice-zone-width-data-from-altika