This dataset comprises estimates of forest above-ground biomass for the years 2010, 2017 and 2018. They are derived from a combination of Earth observation data, depending on the year, from the Copernicus Sentinel-1 mission, Envisat’s ASAR instrument and JAXA’s Advanced Land Observing Satellite (ALOS-1 and ALOS-2), along with additional information from Earth observation sources. The data has been produced as part of the European Space Agency's (ESA's) Climate Change Initiative (CCI) programme by the Biomass CCI team.
The data products consist of two (2) global layers that include estimates of:
1) above ground biomass (AGB, unit: tons/ha i.e., Mg/ha) (raster dataset). This is defined as the mass, expressed as oven-dry weight of the woody parts (stem, bark, branches and twigs) of all living trees excluding stump and roots
2) per-pixel estimates of above-ground biomass uncertainty expressed as the standard deviation in Mg/ha (raster dataset)
This release of the data is version 2, with data provided in both netcdf and geotiff format. The quantification of AGB changes by taking the difference of two maps is strongly discouraged due to local biases and uncertainties. Version 3 maps will ensure a more realistic representation of AGB changes.
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|Previously used record identifiers:||
No related previous identifiers.
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://artefacts.ceda.ac.uk/licences/specific_licences/esacci_biomass_terms_and_conditions.pdf. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data was created by the Biomass CCI team.
For information on the quality of the data see the documentation and website for the Biomass CCI
Data are in NetCDF and GeoTiff formats
|Sentinel 1 Synthetic Aperture Radar (SAR)||Deployed on: Sentinel 1A|
|PALSAR-2||Deployed on: ALOS-2|
Computation Element: 1
|Title||GlobBiomass retrieval algorithm used in the production of the Biomass CCI global dataset of forest above ground biomass for the year 2017.|
|Abstract||The GlobBiomass retrieval algorithm is used to derive estimates of forest above-ground biomass (AGB) from satellite data for the year 2017 as part of the Biomass CCI project. First, per-pixel estimates of growing stock volume (GSV, unit: m3/ha) were obtained from spaceborne SAR images acquired in 2017 (ALOS-2 PALSAR-2, Sentinel-1) with the BIOMASAR algorithm, adapted specifically to ALOS-2 PALSAR-2 and Sentinel-1 data. Individual per-pixel GSV estimates were then combined with a set of merging rules to form the final per-pixel estimate of GSV. The retrieval was supported by LiDAR (ICESAT) data and auxiliary datasets . AGB was then obtained from GSV with a set of Biomass Expansion and Conversion Factors (BCEF) following approaches to extend on ground estimates of wood density and stem-to-total biomass expansion factors to obtain a global raster dataset. See the Algorithm Theoretical Basis Document for details on the EO datasets, the biomass retrieval algorithms and the estimation of the BCEF (see http://cci.esa.int/biomass)|
- units: Mg/ha
- long_name: Above-ground biomass
- var_id: agb
- names: Above-ground biomass
- long_name: Above-ground biomass standard_error
- units: Mg/ha
- var_id: agb_se
- names: Above-ground biomass standard_error
- var_id: crs
- long_name: CRS definition
- names: CRS definition
- var_id: lat_bnds
- var_id: lon_bnds
- var_id: time_bnds
- units: degrees_north
- standard_name: latitude
- var_id: lat
- long_name: WGS84 latitude coordinate
- names: latitude, WGS84 latitude coordinate
- units: degrees_east
- standard_name: longitude
- var_id: lon
- long_name: WGS84 longitude coordinate
- names: longitude, WGS84 longitude coordinate
- standard_name: time
- var_id: time
- long_name: single-year period
- names: time, single-year period