A rule based quality control method for hourly rainfall data and a 1 km resolution gridded hourly rainfall dataset for Great Britain: CEH-GEAR1hr

Lewis, Elizabeth; Quinn, Niall; Blenkinsop, Stephen; Fowler, Hayley J.; Freer, Jim; Tanguy, Maliko ORCID: https://orcid.org/0000-0002-1516-6834; Hitt, Olivia; Coxon, Gemma; Bates, Paul; Woods, Ross. 2018 A rule based quality control method for hourly rainfall data and a 1 km resolution gridded hourly rainfall dataset for Great Britain: CEH-GEAR1hr. Journal of Hydrology, 564. 930-943. https://doi.org/10.1016/j.jhydrol.2018.07.034

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Official URL: http://dx.doi.org/10.1016/j.jhydrol.2018.07.034

Abstract/Summary

High-resolution gridded precipitation products are rare globally, particularly below a daily time-step, yet many hydrological applications require, or can be improved by, a higher temporal resolution of rainfall data. Here, we present a new 1 km resolution gridded hourly rainfall dataset for Great Britain (Gridded estimates of hourly areal rainfall for Great Britain (1990–2014) [CEH-GEAR1hr]) using data from over 1900 quality controlled rainfall gauges, which improves upon the current UK national gridded precipitation datasets at daily time-step. We extend and automate a quality control (QC) procedure to permit the use of hourly data for 1990–2014 and independently validate the QC using daily rainfall data and recorded historic events. Our two-tiered validation approach, at daily and hourly timescales, indicates that spurious extreme values are excluded from the resultant dataset, while legitimate values are preserved. We use a nearest neighbour interpolation scheme to derive gridded hourly rainfall values at 1 km resolution, to temporally disaggregate the CEH-GEAR daily gridded dataset and produce an hourly dataset with consistent daily totals. This provides a unique resource for hydrological applications in Great Britain. The CEH-GEAR1hr dataset, associated metadata and QC information, will be freely available from the Environmental Information Data Centre (EIDC) and hosted alongside the daily and monthly CEH-GEAR product.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1016/j.jhydrol.2018.07.034
UKCEH and CEH Sections/Science Areas:	Water Resources (Science Area 2017-)
ISSN:	0022-1694
Additional Information. Not used in RCUK Gateway to Research.:	Open Access paper - full text available via Official URL link.
Additional Keywords:	gridded hourly precipitation, extremes, quality control, Great Britain, dataset, rain gauge
NORA Subject Terms:	Hydrology
Date made live:	06 Aug 2018 11:32 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/520666

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1016/j.jhydrol.2018.07.034

UKCEH and CEH Sections/Science Areas:

Water Resources (Science Area 2017-)

ISSN:

0022-1694

Additional Information. Not used in RCUK Gateway to Research.:

Open Access paper - full text available via Official URL link.

Additional Keywords:

gridded hourly precipitation, extremes, quality control, Great Britain, dataset, rain gauge