An integrated pan-tropical biomass map using multiple reference datasets

Avitabile, Valerio, Herold, Martin, Heuvelink, Gerard B. M., Lewis, Simon L., Phillips, Oliver L., Asner, Gregory P., Armston, John, Ashton, Peter S., Banin, Lindsay, Bayol, Nicolas, Berry, Nicholas J., Boeckx, Pascal, de Jong, Bernadus H. J., Devries, Ben, Girardin, Cecile A. J., Kearsley, Elizabeth, Lindsell, Jeremy A., Lopez-Gonzalez, Gabriela, Lucas, Richard, Malhi, Yadvinder, Morel, Alexandra, Mitchard, Edward T. A., Nagy, Laszlo, Qie, Lan, Quinones, Marcela J., Ryan, Casey M., Ferry, Slik J. W., Sunderland, Terry, Laurin, Gaia Vaglio, Gatti, Roberto Cazzolla, Valentini, Riccardo, Verbeeck, Hans, Wijaya, Arief and Willcock, Simon (2016) An integrated pan-tropical biomass map using multiple reference datasets. Global Change Biology, 22 4: 1406-1420. doi:10.1111/gcb.13139


Author Avitabile, Valerio
Herold, Martin
Heuvelink, Gerard B. M.
Lewis, Simon L.
Phillips, Oliver L.
Asner, Gregory P.
Armston, John
Ashton, Peter S.
Banin, Lindsay
Bayol, Nicolas
Berry, Nicholas J.
Boeckx, Pascal
de Jong, Bernadus H. J.
Devries, Ben
Girardin, Cecile A. J.
Kearsley, Elizabeth
Lindsell, Jeremy A.
Lopez-Gonzalez, Gabriela
Lucas, Richard
Malhi, Yadvinder
Morel, Alexandra
Mitchard, Edward T. A.
Nagy, Laszlo
Qie, Lan
Quinones, Marcela J.
Ryan, Casey M.
Ferry, Slik J. W.
Sunderland, Terry
Laurin, Gaia Vaglio
Gatti, Roberto Cazzolla
Valentini, Riccardo
Verbeeck, Hans
Wijaya, Arief
Willcock, Simon
Title An integrated pan-tropical biomass map using multiple reference datasets
Journal name Global Change Biology   Check publisher's open access policy
ISSN 1365-2486
1354-1013
Publication date 2016-04-01
Year available 2016
Sub-type Article (original research)
DOI 10.1111/gcb.13139
Open Access Status Not Open Access
Volume 22
Issue 4
Start page 1406
End page 1420
Total pages 15
Place of publication Chichester, West Sussex United Kingdom
Publisher Wiley-Blackwell Publishing
Collection year 2017
Language eng
Formatted abstract
We combined two existing datasets of vegetation aboveground biomass (AGB) (Proceedings of the National Academy of Sciences of the United States of America, 108, 2011, 9899; Nature Climate Change, 2, 2012, 182) into a pan-tropical AGB map at 1-km resolution using an independent reference dataset of field observations and locally calibrated high-resolution biomass maps, harmonized and upscaled to 14 477 1-km AGB estimates. Our data fusion approach uses bias removal and weighted linear averaging that incorporates and spatializes the biomass patterns indicated by the reference data. The method was applied independently in areas (strata) with homogeneous error patterns of the input (Saatchi and Baccini) maps, which were estimated from the reference data and additional covariates. Based on the fused map, we estimated AGB stock for the tropics (23.4 N–23.4 S) of 375 Pg dry mass, 9–18% lower than the Saatchi and Baccini estimates. The fused map also showed differing spatial patterns of AGB over large areas, with higher AGB density in the dense forest areas in the Congo basin, Eastern Amazon and South-East Asia, and lower values in Central America and in most dry vegetation areas of Africa than either of the input maps. The validation exercise, based on 2118 estimates from the reference dataset not used in the fusion process, showed that the fused map had a RMSE 15–21% lower than that of the input maps and, most importantly, nearly unbiased estimates (mean bias 5 Mg dry mass ha−1 vs. 21 and 28 Mg ha−1 for the input maps). The fusion method can be applied at any scale including the policy-relevant national level, where it can provide improved biomass estimates by integrating existing regional biomass maps as input maps and additional, country-specific reference datasets.
Keyword Aboveground biomass
Carbon cycle
Forest inventory
Forest plots
REDD+
Remote sensing
Satellite mapping
Tropical forest
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
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