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Aboveground biomass of African savannahs and woodlands in 2010 at 25 meter resolution


Left: First continental map of the aboveground biomass (AGB) of African savannahs and woodlands at a resolution of 25 meters, from Bouvet al. (2016). The map is built from the 2010 L-band PALSAR mosaic produced by JAXA, along the following steps: a) stratification into wet/dry season areas in order to account for seasonal effects, b) development of a direct model relating the PALSAR backscatter to AGB, with the help of in situ and ancillary data, c) Bayesian inversion of the direct model. This approach allows estimating AGB until 100Mg.ha-1 approximately, while dense forests and non-vegetated areas are masked out using the ESA CCI Land Cover dataset (http://www.esa-landcover-cci.org/).

Right: Pan-tropical map from Baccini et al. (2015) at 30 meter resolution map, available in the Global Forest Watch project (http://www.globalforestwatch.org/). The approach consisted in spatially extrapolating aboveground woody carbon stocks obtained from in situ inventory plots and from ICESat GLAS transects, using Landsat data.

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Aboveground biomass of African savannahs and woodlands in 2010 at 25 meter resolution

Left: First continental map of the aboveground biomass (AGB) of African savannahs and woodlands at a resolution of 25 meters, from Bouvet al. (2016). The map is built from the 2010 L-band PALSAR mosaic produced by JAXA, along the following steps: a) stratification into wet/dry season areas in order to account for seasonal effects, b) development of a direct model relating the PALSAR backscatter to AGB, with the help of in situ and ancillary data, c) Bayesian inversion of the direct model. This approach allows estimating AGB until 100Mg.ha-1 approximately, while dense forests and non-vegetated areas are masked out using the ESA CCI Land Cover dataset (http://www.esa-landcover-cci.org/).

Right: Pan-tropical map from Baccini et al. (2015) at 30 meter resolution map, available in the Global Forest Watch project (http://www.globalforestwatch.org/). The approach consisted in spatially extrapolating aboveground woody carbon stocks obtained from in situ inventory plots and from ICESat GLAS transects, using Landsat data.

References:
  • Bouvet, A., Mermoz, S., Villard, L., Mathieu, R., Naidoo, L. and Le Toan, T., 2016. An above-ground biomass map of African savannahs at 25 meters resolution derived from ALOS PALSAR. In review. Submitted to Remote Sensing of Environment.
  • Baccini, A., Walker, W., Carvalho, L., Farina, M., Sulla-Menashe, D., Houghton, R.A., 2015. Tropical forests are a net carbon source based on new measurements of gain and loss. In review. Accessed through Global Forest Watch Climate on 2016/07/25. climate.globalforestwatch.org.

  • Contacts: Alexandre Bouvet & Stephane Mermoz CESBIO

    Webmapping: Michel Le Page CESBIO
    Thanks to the opensource tools developpers of Leaflet, Papaparse, Gdal & Geoserver

    Cesbio - 2016