Toward a forest biomass reference measurement system for remote sensing applications

Labriere Nicolas, Davies Stuart J., Disney Mathias, Duncanson Laura, Herold Martin, Lewis Simon L., Phillips Oliver L., Quegan Shaun, Saatchi Sassan, Schepaschenko Dmitry, Scipal Klaus, Sist Plinio, Chave Jérôme. 2023. Toward a forest biomass reference measurement system for remote sensing applications. Global Change Biology, 29 (3) : 827-840.

Résumé : Forests contribute to climate change mitigation through carbon storage and uptake, but the extent to which this carbon pool varies in space and time is still poorly known. Several Earth Observation missions have been specifically designed to address this issue, for example, NASA's GEDI, NASA-ISRO's NISAR and ESA's BIOMASS. Yet, all these missions' products require independent and consistent validation. A permanent, global, in situ, site-based forest biomass reference measurement system relying on ground data of the highest possible quality is therefore needed. Here, we have assembled a list of almost 200 high-quality sites through an in-depth review of the literature and expert knowledge. In this study, we explore how representative these sites are in terms of their coverage of environmental conditions, geographical space and biomass-related forest structure, compared to those experienced by forests worldwide. This work also aims at identifying which sites are the most representative, and where to invest to improve the representativeness of the proposed system. We show that the environmental coverage of the system does not seem to improve after at least the 175 most representative sites are included, but geographical and structural coverages continue to improve as more sites are added. We highlight the areas of poor environmental, geographical, or structural coverage, including, but not limited to, Canada, the western half of the USA, Mexico, Patagonia, Angola, Zambia, eastern Russia, and tropical and subtropical highlands (e.g. in Colombia, the Himalayas, Borneo, Papua). For the proposed system to succeed, we stress that (1) data must be collected and processed applying the same standards across all countries and continents; (2) system establishment and management must be inclusive and equitable, with careful consideration of working conditions; and (3) training and site partner involvement in downstream activities should be mandatory.

Mots-clés Agrovoc : télédétection, séquestration du carbone, biomasse, forêt, changement climatique, atténuation des effets du changement climatique, dendrométrie, facteur du milieu, impact sur l'environnement, distribution géographique, forêt tropicale, propriété physicochimique

Mots-clés géographiques Agrovoc : Zambie, Angola, Colombie

Mots-clés libres : Aboveground biomass, Carbon, Earth observation imagery, Forest vegetation, Permanent plots

Classification Agris : K01 - Foresterie - Considérations générales
U30 - Méthodes de recherche

Champ stratégique Cirad : CTS 1 (2019-) - Biodiversité

Agences de financement européennes : European Commission

Agences de financement hors UE : Agence Nationale de la Recherche, National Aeronautics and Space Administration, National Science Foundation, Natural Environment Research Council, Royal Society

Programme de financement européen : H2020

Projets sur financement : (FRA) CEnter of the study of Biodiversity in Amazonia, (FRA) Towards a Unified theory of biotic Interactions: the roLe of environmental

Auteurs et affiliations

• Labriere Nicolas, CNRS (FRA) - auteur correspondant
• Davies Stuart J., STRI (USA)
• Disney Mathias, University College London (GBR)
• Duncanson Laura, University of Maryland (USA)
• Herold Martin, Helmholtz GFZ German Research Centre for Geosciences (DEU)
• Lewis Simon L., University College London (GBR)
• Phillips Oliver L., University of Leeds (GBR)
• Quegan Shaun, University of Sheffield (GBR)
• Saatchi Sassan, California Institute of Technology (USA)
• Schepaschenko Dmitry, International Institute for Applied System Analysis (AUS)
• Scipal Klaus, Agence spatiale européenne (NLD)
• Sist Plinio, CIRAD-ES-UPR Forêts et sociétés (FRA)
• Chave Jérôme, CNRS (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/606864/)

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