64d340d7-8f19-49f9-90e0-83d4013e76c2 English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2026-03-03T15:08:28 UK GEMINI 2.3 OSGB 1936 / British National Grid Fuel moisture and micro-scale combustion calorimetry data for Calluna vulgaris across the UK, April-May 2023 2026-03-02 publication https://catalogue.ceh.ac.uk/id/64d340d7-8f19-49f9-90e0-83d4013e76c2 10.5285/64d340d7-8f19-49f9-90e0-83d4013e76c2 doi: Ivison, K., Little, K., Belcher, C.M., Crawford, A.J., Davidson, S.J., Graham, L.J., Kettridge, N. (2026). Fuel moisture and micro-scale combustion calorimetry data for Calluna vulgaris across the UK, April-May 2023. NERC EDS Environmental Information Data Centre 10.5285/64d340d7-8f19-49f9-90e0-83d4013e76c2 This dataset contains fuel moisture contents and flammability metrics for samples of common heather (Calluna vulgaris) collected across the United Kingdom between 15th April and 20th May 2023. A total of 830 samples were used to measure fuel moisture content (FMC), and 130 of these were also subjected to calorimetric analysis. FMC data were obtained gravimetrically by weighing samples before and after drying. Flammability data were obtained by micro-scale combustion calorimetry, which measures heat release related to flaming combustion of a fuel material. The flammability metrics recorded were the heat release capacity (HRC), peak heat release rate (PHRR), total heat release (THR), and temperature at maximum rate of decomposition (Tmax). These data will contribute to the development of models of fuel moisture variability in UK fuels, and thus refine inputs for fire behaviour modelling, which can inform land management strategies in relation to wildfire risk. Full details about this dataset can be found at https://doi.org/10.5285/64d340d7-8f19-49f9-90e0-83d4013e76c2 Alastair Crawford University of Exeter a.j.crawford2@exeter.ac.uk pointOfContact Ivison, K. University of Birmingham katy_ivison@yahoo.co.uk author Little, K. University of Birmingham k.e.little@bham.ac.uk author Belcher, C.M. University of Exeter c.belcher@exeter.ac.uk author Crawford, A.J. University of Exeter a.j.crawford2@exeter.ac.uk author Davidson, S.J. Université du Québec à Montréal davidson.scott_j@uqam.ca author Graham, L.J. University of Birmingham l.graham@bham.ac.uk author Kettridge, N. University of Birmingham n.kettridge@bham.ac.uk author University of Birmingham EMAIL NOT PROVIDED owner NERC EDS Environmental Information Data Centre info@eidc.ac.uk publisher NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian Environmental Monitoring Facilities theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Environmental risk wildfire fuel moisture flammability citizen science heathland United Kingdom otherRestrictions no limitations otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions If you reuse this data, you should cite: Ivison, K., Little, K., Belcher, C.M., Crawford, A.J., Davidson, S.J., Graham, L.J., Kettridge, N. (2026). Fuel moisture and micro-scale combustion calorimetry data for Calluna vulgaris across the UK, April-May 2023. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/64d340d7-8f19-49f9-90e0-83d4013e76c2 textTable English utf8 biota environment 2023-04-01 2023-05-31 -7.63 1.11 50.01 58.66 Comma-separated values (CSV) NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://data-package.ceh.ac.uk/data/64d340d7-8f19-49f9-90e0-83d4013e76c2 Download the data Download a copy of this data download https://data-package.ceh.ac.uk/sd/64d340d7-8f19-49f9-90e0-83d4013e76c2.zip Supporting information Supporting information available to assist in re-use of this dataset information dataset dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Volunteers were requested to collect samples on 19 April 2023, or as close as possible to this date, based on forecasts of dry, fire-prone weather for the UK. At each sampling location, the approximate height of the heather canopy was measured, and live C. vulgaris was clipped from c. 10 plants along a 20 m transect. Samples from each transect were combined in an aluminium tin, sealed with tape to prevent moisture loss, and sent for analysis by priority mail. Samples for fuel moisture analysis only (n = 700) were weighed, dried at 80°C for 48 h, and then reweighed. Samples for calorimetric analysis (n = 130) were analysed using an FAA Micro Calorimeter (Fire Testing Technology Ltd, East Grinstead, UK). Two subsamples of 6.2‒31.1 mg were analysed from each sample. The heating rate of the pyrolysis chamber was set to 3°C s-1, the maximum pyrolysis temperature to 750°C, and the combustion chamber temperature to 900°C. The N₂ flow rate was set to 80 cm³ min-1 and the O₂ flow rate to 20 cm³ min-1. For each flammability metric (HRC, PHRR, THR and Tmax) the mean of the tests for the two subsamples was taken. The remainder of each sample was used to obtain FMC: the sample was weighed, then dried at 50 °C until it reached constant weight. Fuel moisture was defined as: Fuel Moisture = ((wet mass - dry mass) / dry mass) × 100