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MASIE - Multisensor Analyzed Sea Ice Extent - Northern Hemisphere (MASIE-NH)

Where is Arctic sea ice NOW?

To give you the best available Arctic-wide answer to the above question, the MASIE (may-zee) project is produced in cooperation with the U.S. National Ice Center.

MASIE lets you view and download:

  • Northern Hemisphere-wide sea ice coverage for latest day and the last four weeks
  • Sea ice coverage by region
  • A file of sea ice extent in sq km for the entire Northern Hemisphere and by region for the last four weeks, updated daily

MASIE uses the most recent full day of data from the National Ice Center, obtained nightly. As is the rule with operational centers, gaps in production can occur without warning.

To obtain the last four weeks of data, see the product archive on the FTP site. For details about this data set, see the full documentation.

NSIDC has received support to develop MASIE but not to maintain MASIE. We are actively seeking support to maintain the Web site and products over the long term. If you find MASIE helpful, please let us know with a quick message to NSIDC User Services.

Download Daily Northern Hemisphere Sea Ice Extent:

  • GeoTIFF (All Surface Types)
  • GeoTIFF (Ice/Not Ice)
  • PNG
  • Shapefile
  • KMZ

Download Sea Ice Extent Values:  Comma Separated Values (CSV) file

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