dataset · Global

ERA5 post-processed daily statistics on single levels from 1940 to present

ERA5 is the fifth generation ECMWF reanalysis for the global climate and weather for the past 8 decades. Data is available from 1940 onwards. ERA5 replaces the ERA-Interim reanalysis. Reanalysis combines model data with observations from across the world into a globally complete and consistent dataset using the laws of physics. This principle, called data assimilation, is based on the method used by numerical weather prediction centres, where every so many hours (12 hours at ECMWF) a previous fo

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Source details

Licence: CC-BY-4.0

Evidence quality: 32.5

Listed in cds 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 llm-inferred: ERA5 single-level reanalysis variables, post-processed to daily statistics
Coverage llm-inferred: Global · 1940 to present
Resolution llm-inferred: daily (temporal); spatial grid not stated in metadata
Access llm-inferred: Open licence CC-BY-4.0; no authentication listed in metadata

Useful for

Use cases llm-inferred: Long-term rainfall and temperature context for flood risk assessment (FRA) baselines · Historical weather inputs for drainage or geotechnical ground-condition studies · Climate trend analysis for water resources and environmental planning
Audience llm-inferred: hydrologists · flood consultants · drainage engineers · environmental consultants · planners

Limitations

Constraints llm-inferred: Reanalysis is a model-plus-observations estimate, not direct observation · Spatial resolution, formats and update cadence are not stated in the metadata · No DOCS retrieved, so no fact in this record is docs-verified

Evidence

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