Identification

Title

Mean and variability of topsoil organic carbon concentrations across Great Britain at 1km resolution from an ensemble of eight digital soil maps

Abstract

This dataset presents the mean topsoil (0-15 cm) organic carbon concentration (g kg-1) and measures of its variability at 1 km resolution across Great Britain. The mean and variability metrics were calculated from an ensemble of eight previously published digital soil maps applied to all 1 km grid cells across GB where data were available from all eight maps. Four of the maps were generated from the 2007 UKCEH Countryside Survey topsoil data, two of which are available online to use. Two maps are from the International Soil Reference and Information Centre, ISRIC: SoilGrids250m v.1 (2017) and v.2 (2020) which are free to download. Two maps are from the EU’s Joint Research Centre (JRC): the OCTOP map of 2004 and LUCAS map of 2014 which are both free to download. The dataset comes in the form of a seven-band raster tiff file, with each band representing the following: 1. Mean predicted soil organic carbon concentration (g kg-1) of all eight maps at each 1 km grid cell 2. Standard deviation (g kg-1) of all eight maps at each 1 km grid cell 3. Coefficient of variation (unitless; the standard deviation divided by the mean) at each 1 km grid cell 4. Signal to noise ratio (unitless; the mean divided by the standard deviation) at each 1 km grid cell 5. Name of the map that deviates the most from the ensemble mean at each 1 km grid cell 6. Relative size (%) of the largest difference from the ensemble mean at each 1 km grid cell 7. Relative size of the largest difference from the ensemble mean expressed as the number of standard deviations exceeded at each 1 km grid cell This work was supported by the Natural Environment Research Council award number NE/R016429/1 as part of the UK-SCAPE programme delivering National Capability. Full details about this dataset can be found at https://doi.org/10.5285/c3b400ea-f603-4bc2-9225-5f1abfa9fe65

Resource type

dataset

Resource locator

https://data-package.ceh.ac.uk/data/c3b400ea-f603-4bc2-9225-5f1abfa9fe65

name: Download the data

description: Download a copy of this data

function: download

https://data-package.ceh.ac.uk/sd/c3b400ea-f603-4bc2-9225-5f1abfa9fe65.zip

name: Supporting information

description: Supporting information available to assist in re-use of this dataset

function: information

Unique resource identifier

code

https://catalogue.ceh.ac.uk/id/c3b400ea-f603-4bc2-9225-5f1abfa9fe65

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

environment

geoscientificInformation

Keywords

Keyword set

keyword value

Soil

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Soil Organic Carbon

Topsoil

Countryside Survey

UK-SCAPE

Great Britain

Geographic location

West bounding longitude

-8.648

East bounding longitude

1.768

North bounding latitude

60.861

South bounding latitude

49.864

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2022-12-09

Frequency of update

Quality and validity

Lineage

Topsoil organic carbon concentrations were summarised at every 1 km grid cell where predictions exist from all eight of the compared digital soil maps. Most of the maps used to generate our dataset reflect the topsoil conditions of approximately the year, 2007 at a spatial resolution of 1 km; however, two maps at 250 m resolution were derived from a global soils database, and one map (1 km) from a European database, that include much older topsoil samples. A second map (500 m resolution) developed for Europe covers soil samples taken in 2009. The first step before comparing the eight maps was to harmonise them to the same coordinate reference system (EPSG: 27700 / British National Grid) and grid resolution (1 km). Reprojection to British National Grid was done using tools in ArcMap, with all eight maps aligned to the Ordnance Survey (OS) 1 km grid system. Resampling to 1 km grids was undertaken on the two ISRIC maps and two JRC maps (see “Description”) by taking the means of all grid cells that occurred within each 1 km grid represented by the OS 1 km grid system. All layers have been checked to ensure they conform to the same spatial extent, resolution, and coordinate reference system. The mean and standard deviation layers contain only positive values up to a maximum value of 550 g kg-1 (the theoretical upper limit of soil organic carbon concentration).

Conformity

Conformity report

specification

title

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

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2023-04-14T11:20:20

Metadata language

eng