GHRSST K10_SST: Global 10 km Analyzed Sea Surface Temperature from NAVO

A daily operational sea surface temperature analysis produced by the Naval Oceanographic Office on a global 0.1x0.1 degree grid. The K10 Level 4 product synthesizes data from multiple satellite instruments, including AVHRR, VIIRS, and SEVIRI, to represent SST at a 1-meter reference depth. This updated version uses the GHRSST Data Specification v2.0 format and adds a sea ice fraction variable.

Use Cases

• Modeling ocean heat content and climate patterns based on daily global SST analyses.
• Assimilating satellite-derived temperature data into numerical weather prediction models.
• Studying sea ice extent and its relationship with ocean temperature using the added sea_ice_fraction variable.
• Calibrating and validating other satellite or in-situ ocean temperature measurements.
• Analyzing long-term SST trends from the integrated climatology data (1985-1999).

Strengths

• Operational daily production ensures regular data updates.
• Integrates observations from multiple satellite platforms (AVHRR, VIIRS, SEVIRI) for comprehensive coverage.
• Uses a weighted average that considers data age, reliability, and resolution.
• Updated to GHRSST Data Specification v2.0 with enhanced metadata and a new sea_ice_fraction variable.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment for large-scale ML projects.
• Data may reflect temporal or spatial bias inherent to the availability of satellite passes.

Provenance

Source

Naval Oceanographic Office (NAVO), aggregated by NASA.

Collection Method

Daily analysis combining SST retrievals from AVHRR (MetOp-A, MetOp-B, NOAA-19), VIIRS (Suomi_NPP), and SEVIRI (Meteosat-8, -11) satellites.

Time Range

Operational daily product; incorporates climatology data from 1985-1999 when recent data is unavailable.

Freshness

Last updated 2026-03-13 02:39:47.193754; freshness should be verified.

Geography

Global coverage on a 0.1x0.1 degree grid.