Sea Ice Concentrations from Passive Microwave Satellites, 1978 to Present

Polar sea ice concentration data derived from Nimbus-7 and DMSP satellite brightness temperature measurements. The dataset provides a consistent time series starting on 26 October 1978 and is updated several times annually. Data is gridded in a polar stereographic projection at a 25 x 25 km resolution.

Use Cases

• Analyzing long-term trends in polar sea ice extent based on the continuous time series from 1978.
• Modeling climate change impacts on Arctic and Antarctic regions using the gridded concentration data.
• Validating sea ice forecasts and models against historical satellite observations.
• Studying seasonal and interannual variability of sea ice coverage from the passive microwave record.

Strengths

• Provides a continuous, consistent record spanning over four decades, starting 26 October 1978.
• Data is gridded at a uniform 25 x 25 km spatial resolution in a polar stereographic projection.
• Time series is maintained with updates processed several times annually.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and total file size are unknown, which may limit suitability assessment.

Provenance

Source

NSIDC_CPRD (National Snow and Ice Data Center, NASA).

Collection Method

Generated from brightness temperature data from Nimbus-7 SMMR and DMSP SSM/I-SSMIS passive microwave instruments.

Time Range

26 October 1978 to present.

Freshness

Updated several times annually; ongoing through the most current processing.

Geography

Global polar regions (Arctic and Antarctic).