Arctic Sea Ice Melt and Freeze Indicators from Satellite Data

Passive microwave satellite data from 1979 to 2017 delineates 14 specific stages of the Arctic sea ice melt season. This dataset provides gridded annual indicators for events like melt onset, freeze onset, and ice-free periods on a 25 km polar stereographic grid. Researchers can track the timing and duration of seasonal ice loss and gain across the entire Arctic Ocean.

Use Cases

• Tracking annual melt onset timing based on the dates of early, continuous, and melt onset parameters.
• Analyzing the length of the open water season using the total outer and inner ice-free period indicators.
• Mapping the seasonal ice zone extent and variability using the gridded annual data.
• Correlating freeze onset dates with autumn atmospheric conditions.
• Calculating trends in the seasonal loss-of-ice and gain-of-ice periods over the 39-year record.

Strengths

• Covers a 39-year time series from 1979 through 2017, enabling long-term trend analysis.
• Derived from two established, archived input datasets: the NOAA/NSIDC Climate Data Record and DMSP SSM/I-SSMIS brightness temperatures.
• Provides 14 distinct, physically meaningful climate indicators for detailed phenological study.

Limitations

• Key metadata such as row count, file size, and specific column names are unavailable across all sources.
• The data record ends in 2017, limiting analysis of recent Arctic changes.
• Conflicting license information exists between platforms ('other-license-specified' vs. 'None').

Provenance

Source

National Aeronautics and Space Administration (NASA). Data derived from NOAA/NSIDC and DMSP SSM/I-SSMIS archives.

Collection Method

Primarily derived using Sea Ice Concentration (SIC) observations and brightness temperature observations from passive microwave satellites.

Time Range

1979 through 2017

Freshness

Last updated metadata on one platform indicates 2026-03-13, though the underlying data covers up to 2017.

Geography

Arctic, gridded on the NSIDC northern hemisphere polar stereographic grid.