MASIE - Multisensor Analyzed Sea Ice Extent - Northern Hemisphere (MASIE-NH)
NOTICE: Daily MASIE data processing has resumed, however, there are gaps in the time series that we are still working to address. From 02 December 2014 to 17 March 2015, no data are available because the input data files for that time period are corrupt. When our data provider has reprocessed those data, we will back fill the MASIE data, however NSIDC has no estimated date for when we will receive them. Contact NSIDC User Services with any questions.

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 since 01 October 2006
  • 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 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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