dataset · Global

ERA5-Land Daily Aggregated - ECMWF Climate Reanalysis

ERA5-Land is a reanalysis dataset providing a consistent view of the evolution of land variables over several decades at an enhanced resolution compared to ERA5. ERA5-Land has been produced by replaying the land component of the ECMWF ERA5 climate reanalysis. Reanalysis combines model data with observations from across the world into a globally complete and consistent dataset using the laws of physics. Reanalysis produces data that goes several decades back in time, providing an accurate descrip

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Source details

Licence: proprietary

Evidence quality: 41.3

Listed in gee 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: 50 daily aggregated variables from hourly ERA5-Land assets · temperature (e.g. temperature_2m, dewpoint_temperature_2m, skin_temperature) · lakes (e.g. lake_ice_depth, lake_mix_layer_temperature) · snow (e.g. snow_depth, snowfall_sum, snowmelt_sum) · soil water (e.g. volumetric_soil_water_layer_1 to _4) · radiation · heat flux · evaporation · runoff · wind · pressure · precipitation · vegetation
Coverage docs-verified: Global · 1950 to near real-time
Resolution docs-verified: Spatial: 11132 m pixel (about 11 km), all bands. Temporal: daily aggregates of hourly ERA5-Land data
Update frequency docs-verified: Monthly cadence
Formats docs-verified: Google Earth Engine ImageCollection
Access docs-verified: Hosted on Google Earth Engine; requires specific acknowledgement and citation when used. Licence listed as proprietary in ENTRY metadata; no API key listed (auth null)

Useful for

Use cases llm-inferred: Antecedent conditions for flood risk assessment using daily precipitation, runoff and volumetric soil water · Snow depth and snowmelt inputs for upland catchment flood or FRA baselines · Lake and reservoir temperature context for water quality appraisals · Evapotranspiration and water balance inputs for drainage or SuDS feasibility checks
Audience llm-inferred: hydrologists · flood consultants · drainage engineers · environmental consultants · GIS analysts

Limitations

Constraints docs-verified: Known issue: three evaporation variables (evabs, evaow, evavt) have swapped values in the source data · Precipitation and other accumulated flow bands can have negative or excessively high values due to GRIB packing; daily totals may be unreliable as a result · Flow bands are labelled _sum and differ from CDS daily data, where flow bands are averaged · Data runs to about three months behind real-time · About 11 km pixel size is too coarse for site-scale analysis · Dataset availability end date conflicts between the summary (2025-10-10) and the availability field (2026-10-06)

Evidence

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