Satellite-Derived Global Sea-Surface Height with Geostrophic Currents, 1993-Present

Satellite-derived sea-surface height measurements from TOPEX/Poseidon/ERS, JASON-1/Envisat, and Jason-2/Envisat sensors, combined with a Niiler climatology to obtain absolute heights. The data provides global coverage at approximately 0.25-degree spatial resolution from 1993 to the present, with weekly and monthly science-quality data. Geostrophic current components are mathematically derived from this data.

Use Cases

• Modeling global ocean circulation patterns based on derived geostrophic current components.
• Analyzing long-term sea-level rise trends based on the 1993-present time series of sea-surface height.
• Validating oceanographic models using the Niiler climatology-adjusted absolute sea surface heights.
• Studying mesoscale ocean eddies and their dynamics based on high-resolution (0.25-degree) altimetry data.

Strengths

• Global geographic coverage and a long temporal record spanning from 1993 to the present.
• Data is derived from multiple established satellite missions (e.g., TOPEX/Poseidon, JASON).
• Provides both science-quality delayed data and near-real-time weekly composites.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• The description mentions a spatial resolution of 0.5 degrees for geostrophic currents, which is coarser than the 0.25-degree height data.

Provenance

Source

National Oceanic and Atmospheric Administration, Department of Commerce

Collection Method

Satellite measurements collected and reprocessed from AVISO, combined with Niiler climatology.

Time Range

1993-present

Freshness

Last updated 2026-03-14 22:59:43.007004; freshness should be verified.

Geography

global