Forest biomass dataset Alterra, Wageningen UR and European Forest Institute Geerten Hengeveld, Katja Gunia, Markus Didion, Sergey Zudin, Sandra Clerkx, Mart-Jan Schelhaas
Validation data for the CARBONES CCDAS system Forest pools and uncertainties (annual) ● Forest area (km 2 ) ● Timber volume (m 3 ) ● Aboveground biomass (kg) ● Carbon in aboveground biomass (kg) ● Belowground biomass (kg) ● Carbon in belowground biomass (kg) ● Total biomass (kg) ● Carbon in total biomass (kg) ● Changes in pools per 5 years
Data FAO-FRA (Global Forest Resources Assessments) MCPFE (Europe) UNECE ● Per Country ● (minimal 5 year interval) ● Forest Area ● Growing Stock IPCC 2006 good practice guidance for biomass conversion and expansion factors to estimate above- ground and below-ground biomass and carbon
Processing Quality check: remove outliers Interpolate in between data points Extend values outside data range (flat) Gridding, relative to current forest cover map Assign uncertainties
Calculations Stock per Area 1 degree grid Growing Stock IPCC constants Forest area Growing Stock Forest map Country Growing Stock Aboveground biomass/ carbon
Uncertainty assessment Base uncertainty ● 3 classes (1,2,3 points) ● Trend over all records ● Coefficient of variation of detrended records Methodology uncertainty ● point per year (pre 1990) Interpolation uncertainty ● 0.1 point per year
Technical specifications 1 degree grid Global cover Mollweide projection, Datum WGS84 NetCDF file
Data policy Free to use Proper referencing (Hengeveld et al., in prep) Downloadable at ● the CARBONES portal ● or systems.nl/thredds/catalog/projecten/EuropeanFore st/carbones/catalog.htmlhttp://opendap.cgi- systems.nl/thredds/catalog/projecten/EuropeanFore st/carbones/catalog.html
Exemple: above ground forest biomass (5 years mean) around 2005
Reference: Hengeveld, G.M.H., K. Gunia, M. Didion, S. Zudin, A.P.P.M. Clerkx, M.J. Schelhaas. Gridded maps as derived from a compilation of global forest biomass estimates To be submitted to Earth System Science Data.