ECMWF daily maximum air temperature exceedance of 27°C - Kent (UK), 2022

Demonstration Case Name

Multi-hazards in the Southeast UK region

Dataset Title

ECMWF daily maximum air temperature exceedance of 27°C - Kent (UK), 2022

Dataset Description

This dataset consists of:

• ECMWF_Daily_AirTmax_Kent2022_1km.tif: a multi-layer image where each layer represents the ECMWF Daily Maximum Air Temperature at 2m for each date in 2022 for the wider Kent region in Southeast UK.
• ECMWF_Daily_AirTmax_exceeding_27C_binary_mask_Kent2022_1km.tif: a multi-layer image where each layer represents where the ECMWF Daily Maximum Air Temperature at 2m exceeds 27°C, UK Met Office threshold for heatwave conditions, for each date in 2022 for the wider Kent region in Southeast UK.
• ECMWF_Daily_AirTmax_exceeding_27C_mask_applied_Kent2022.tif: a multi-layer image where each layer represents the ECMWF Daily Maximum Air Temperature at 2m values after application of the binary mask for each date in 2022 for the wider Kent region in Southeast UK.

Data was generated using code developed within the Google Earth Engine online platform and output in GeoTIFF formats for interoperability and comparative analysis within GIS.

Key Methodologies

Calculation of pixel threshold exceedance of 27°C for each day on the 2022 daily air temperature variable (air_temperature_2m_max) multi-date image stack, coded in Google Earth Engine online platform. Output in raster format.

Temporal Domain

Daily: 1st January 2022 to 31st December 2022.

Spatial Domain

Geographic extent covering the region of Kent, Southeast UK.

Projected Coordinate System: British National Grid (EPSG:27700)

Spatial Extent Bounding Box: Upper Left (182000N, 509000E), Lower Right (95000N, 641000E)

Spatial Resolution: 1km x 1km (resampled from original 11km data in GEE)

Key Indicators

Daily binary image stack indicating where pixels exceed the temperature threshold of 27°C, temperature threshold indicated by the UK Met Office to signify a heatwave in Kent.

Data Format

GeoTIFF (*.tif)

Source Data

Primary source: ECMWF Climate Reanalysis ERA5-Land Daily Aggregated dataset (variable: ‘air_temperature_2m_max’), accessed through the Google Earth Engine online platform (GEE) made available to by the Copernicus Climate Data Store (https://cds.climate.copernicus.eu/) under CC-BY-4.0 licence (https://creativecommons.org/licenses/by/4.0/).

Accessibility

10.5281/zenodo.17130997

Stakeholder Relevance

Urban planning departments
Emergency response organizations
Infrastructure development teams
Disaster risk assessment analysts

Limitations/Assumptions

Original spatial resolution of data 11km (as available in GEE).

Additional Information

Technical specifications: GeoTIFF format require use of a multi-band image visualisation package

Binary pixel values: 0 representing no threshold exceedance, 1 representing threshold exceedance

Non binary mask images: pixel values represent the ECMWF Daily Maximum Air Temperature at 2m within that pixel.

Contact Information

kmcm@bgs.ac.uk