dataset · Global

NASA ROSES Project

The Reconstructed Sea Level dataset contains sea level anomalies derived from satellite altimetry and tide gauges. The satellite altimetric record provides accurate measurements of sea level with near-global coverage, but it has a relatively short time span, since 1993. Tide gauges have measured sea level over the last 200 years, with some records extending back to 1807, but they only provide regional coverage, not global. Combining satellite altimetry with tide gauges, using a technique known a

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Source details

Licence: [Creative Commons BY 4.0](https://creativecommons.org/licenses/by/4.0/)

Evidence quality: 39.5

Listed in aws-odr public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

What's in it

Data offered docs-verified: sea level anomalies (reconstructed from satellite altimetry and tide gauges)
Coverage docs-verified: near-global · 1950-2009
Resolution docs-verified: weekly temporal; half-degree spatial
Update frequency docs-verified: Varies by dataset (registry boilerplate; no fixed cadence stated for this reconstruction)
Access docs-verified: Earthdata Login account required; controlled-access AWS S3 bucket (us-west-2); licence Creative Commons BY 4.0

Useful for

Use cases llm-inferred: Long-term sea level anomaly context for coastal flood risk assessments (1950-2009 baseline) · Historical sea level anomaly series for checking tidal boundary assumptions in coastal or estuarine studies · Desk study review of regional sea level variability for coastal drainage outfall design
Audience llm-inferred: coastal engineers · flood risk consultants · hydrologists · GIS analysts

Limitations

Constraints llm-inferred: Record ends in 2009, so it does not cover current sea level conditions · Tide gauge records give only regional coverage, so the reconstruction depends on gauge density in the area of interest · Weekly, half-degree grid is not suited to site-scale analysis · Controlled access: requires an Earthdata Login and AWS credentials · Update frequency is not stated for this dataset

Evidence

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.