Daily and sub-daily hydrometeorological and soil moisture data (2013-2025) [COSMOS-UK]

This dataset contains daily and sub-daily hydrometeorological and soil moisture observations from the COSMOS-UK (cosmic-ray soil moisture) monitoring network from October 2013 to the end of 2025 . These data are from 51 sites across the UK recording a range of hydrometeorological and soil variables. Each site in the network records the following hydrometeorological and soil data at 30-minute resolution: Radiation (short wave, long wave, and net), precipitation, atmospheric pressure, air temperat

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What's in it

Data offered docs-verified: radiation (short wave, long wave, net) · precipitation · atmospheric pressure · air temperature · wind speed and direction · humidity · soil heat flux · soil temperature (point sensors at depth) · soil volumetric water content (point sensors at depth) · COSMOS field-scale volumetric water content (daily) · snow water equivalent (daily, derived) · potential evapotranspiration (daily, derived, Penman-Monteith) · quality control flags
Coverage docs-verified: UK, 51 monitoring sites · 2013-01-01 to 2025-12-31 (metadata temporal extent; description says observations from October 2013)
Resolution docs-verified: 30-minute for site sensor data; daily for COSMOS VWC, snow water equivalent and potential evapotranspiration. Point-sensor sites; COSMOS VWC is field-scale.
Update frequency docs-verified: Raw data sent to UKCEH hourly. This is a versioned release (latest version covers 2013-2025, publication date 2026-07-09); release cadence is not stated.
Formats docs-verified: CSV
Access docs-verified: Open Government Licence. Scripted bulk download (wget/curl) requires a personal access token sent as a Bearer header; payment terms not stated.

Useful for

Use cases llm-inferred: Antecedent soil moisture context for flood risk assessment and drainage design calibration · Snow water equivalent inputs for snowmelt flood modelling · Potential evapotranspiration and soil moisture inputs for water balance or drought assessment · Local hourly-to-daily meteorological baseline for site-specific hydrological studies
Audience llm-inferred: hydrologists · flood consultants · drainage engineers · ecologists · GIS analysts

Limitations

Constraints docs-verified: Point-sensor network of 51 UK sites; not spatially continuous · Snow leads to erroneously high COSMOS VWC unless adjusted on flagged snow days · Scripted download needs a personal access token, although the catalogue entry lists auth as null · Missing data occur and are flagged per 30-minute record; the QC flags indicate the reason · Temporal extent in metadata (from 2013-01-01) differs from the description (from October 2013)

Licence: Open government licence
Authentication: Unknown — review source docs
GitHub stars: Unknown
Last commit: Unknown
Last successful page check: 16/10/2026
Page health: healthy
Package: Not recorded
Verification: Not independently verified

Provenance & evidence

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

Metadata observed 14/10/2026 · research sweep: sweep-2026-10-16 (ukceh-eidc)

https://catalogue.ceh.ac.uk/documents/dde10e2b-ee1a-4b2b-a247-176db2f7bb31