Assimilating satellite-based canopy height within an ecosystem model to estimate aboveground forest biomass
von Poncet, F.
AffiliationUniv Arizona, Dept Ecol & Evolut Biol
MetadataShow full item record
PublisherAMER GEOPHYSICAL UNION
CitationAssimilating satellite-based canopy height within an ecosystem model to estimate aboveground forest biomass 2017, 44 (13):6823 Geophysical Research Letters
JournalGeophysical Research Letters
Rights©2017. American Geophysical Union. All Rights Reserved.
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AbstractDespite advances in Earth observation and modeling, estimating tropical biomass remains a challenge. Recent work suggests that integrating satellite measurements of canopy height within ecosystem models is a promising approach to infer biomass. We tested the feasibility of this approach to retrieve aboveground biomass (AGB) at three tropical forest sites by assimilating remotely sensed canopy height derived from a texture analysis algorithm applied to the high-resolution Pleiades imager in the Organizing Carbon and Hydrology in Dynamic Ecosystems Canopy (ORCHIDEE-CAN) ecosystem model. While mean AGB could be estimated within 10% of AGB derived from census data in average across sites, canopy height derived from Pleiades product was spatially too smooth, thus unable to accurately resolve large height (and biomass) variations within the site considered. The error budget was evaluated in details, and systematic errors related to the ORCHIDEE-CAN structure contribute as a secondary source of error and could be overcome by using improved allometric equations.
Note6 month embargo; published online: 11 July 2017
VersionFinal published version
SponsorsGordon and Betty Moore Foundation NERC Consortium Grants "AMAZONICA" [NE/F005806/1]; Investissement d'Avenir [ANR-10-LABX-25-01, TULIP: ANR-10-LABX-0041, ANAEE-France: ANR-11-INBS-0001]; European Union Climate KIC grant FOREST Specific Grant [EIT/CLIMATE KIC/SGA2016/1CNES]; European Research Council Synergy grant [ERC-2013-SyG-610028 IMBALANCE]; (CR)2 Chile [CONICYT/FONDAP/15110009]