UKCP09: Long-Term Average Mean Vapour Pressure on a 25km UK Grid

UKCP09 25 km gridded data provides long-term average mean vapour pressure for the United Kingdom. The dataset contains monthly, seasonal, and annual averages for the 1961-1990 climate baseline period. It was created with financial support from the UK Department for Environment, Food and Rural Affairs (Defra) and is promoted by the UK Climate Impacts Programme.

Use Cases

• Modeling historical atmospheric moisture content based on the 1961-1990 baseline period
• Analyzing seasonal vapour pressure patterns based on the provided monthly and seasonal averages
• Creating baseline climate maps for the UK based on the 25 x 25 km gridded data
• Validating regional climate model outputs based on the HadRM3 model grid structure

Strengths

• Data is provided for a standard 30-year climate baseline period (1961-1990)
• Includes 17 distinct temporal aggregations (12 months, 4 seasons, 1 annual)
• Grid values are derived from a higher-resolution 5 x 5 km source, likely containing aggregated detail

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Data may reflect temporal bias inherent to the specific 1961-1990 baseline period

Provenance

Source

Met Office

Collection Method

Derived from the HadRM3 regional climate model, with 25km grid box values averaged from underlying 5km cells.

Time Range

1961-1990

Freshness

Last updated 2026-07-08 13:33:07.765716; freshness should be verified

Geography

United Kingdom, on a 25 x 25 km grid