Hydro-PE: gridded datasets of historical and future Penman-Monteith potential evaporation for the United Kingdom

Robinson, Emma L. ORCID: https://orcid.org/0000-0002-3746-4517; Brown, Matthew J. ORCID: https://orcid.org/0000-0003-1127-0279; Kay, Alison L. ORCID: https://orcid.org/0000-0002-5526-1756; Lane, Rosanna A. ORCID: https://orcid.org/0000-0003-4176-9214; Chapman, Rhian ORCID: https://orcid.org/0000-0002-3842-1420; Bell, Victoria A. ORCID: https://orcid.org/0000-0002-0792-5650; Blyth, Eleanor M. ORCID: https://orcid.org/0000-0002-5052-238X. 2023 Hydro-PE: gridded datasets of historical and future Penman-Monteith potential evaporation for the United Kingdom. Earth System Science Data, 15 (10). 4433-4461. https://doi.org/10.5194/essd-15-4433-2023

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Abstract/Summary

We present two new potential evaporation datasets for the United Kingdom: a historical dataset, Hydro-PE HadUK-Grid, which is derived from the HadUK-Grid gridded observed meteorology (1969–2021), and a future dataset, Hydro-PE UKCP18 RCM, which is derived from UKCP18 regional climate projections (1980–2080). Both datasets are suitable for hydrological modelling and provide Penman–Monteith potential evapotranspiration parameterised for short grass, with and without a correction for interception on days with rainfall. The potential evapotranspiration calculations have been formulated to closely follow the methodology of the existing Meteorological Office Rainfall and Evaporation Calculation System (MORECS) potential evapotranspiration, which has historically been widely used by hydrological modellers in the United Kingdom. The two datasets have been created using the same methodology to allow seamless modelling from past to future. Hydro-PE HadUK-Grid shows good agreement with MORECS in much of the United Kingdom, although Hydro-PE HadUK-Grid is higher in the mountainous regions of Scotland and Wales. This is due to differences in the underlying meteorology, in particular the wind speed, which are themselves due to the different spatial scales of the data. Hydro-PE HadUK-Grid can be downloaded from https://doi.org/10.5285/9275ab7e-6e93-42bc-8e72-59c98d409deb (Brown et al., 2022) and Hydro-PE UKCP18 RCM can be downloaded from https://doi.org/10.5285/eb5d9dc4-13bb-44c7-9bf8-c5980fcf52a4 (Robinson et al., 2021).

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.5194/essd-15-4433-2023
UKCEH and CEH Sections/Science Areas:	Hydro-climate Risks (Science Area 2017-)
ISSN:	1866-3508
Additional Information. Not used in RCUK Gateway to Research.:	Open Access paper - full text available via Official URL link.
NORA Subject Terms:	Meteorology and Climatology Data and Information
Related URLs:	Dataset Dataset Other
Date made live:	18 Oct 2023 10:27 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/536036

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