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Forest biomass dataset Alterra, Wageningen UR and European Forest Institute Geerten Hengeveld, Katja Gunia, Markus Didion, Sergey Zudin, Sandra Clerkx,

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Presentation on theme: "Forest biomass dataset Alterra, Wageningen UR and European Forest Institute Geerten Hengeveld, Katja Gunia, Markus Didion, Sergey Zudin, Sandra Clerkx,"— Presentation transcript:

1 Forest biomass dataset Alterra, Wageningen UR and European Forest Institute Geerten Hengeveld, Katja Gunia, Markus Didion, Sergey Zudin, Sandra Clerkx, Mart-Jan Schelhaas

2 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

3 Data  FAO-FRA (Global Forest Resources Assessments)  MCPFE (Europe)  UNECE ● Per Country ● 1948-2011 (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

4 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

5 Calculations Stock per Area 1 degree grid Growing Stock IPCC constants Forest area Growing Stock Forest map Country Growing Stock Aboveground biomass/ carbon

6 Uncertainty assessment  Base uncertainty ● 3 classes (1,2,3 points) ● Trend over all records ● Coefficient of variation of detrended records  Methodology uncertainty ● 0.025 point per year (pre 1990)  Interpolation uncertainty ● 0.1 point per year

7 Technical specifications  1 degree grid  Global cover  Mollweide projection, Datum WGS84  NetCDF file

8 Data policy  Free to use  Proper referencing (Hengeveld et al., in prep)  Downloadable at ● the CARBONES portal ● or http://opendap.cgi- systems.nl/thredds/catalog/projecten/EuropeanFore st/carbones/catalog.htmlhttp://opendap.cgi- systems.nl/thredds/catalog/projecten/EuropeanFore st/carbones/catalog.html

9 Exemple: above ground forest biomass (5 years mean) around 2005

10 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 1950-2010. To be submitted to Earth System Science Data.

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