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In Situ Reference Datasets From the TropiSAR and AfriSAR Campaigns in Support of Upcoming Spaceborne Biomass Missions

Nicolas Labrière 1 Shengli Tao 1 Jérôme Chave 1 Klaus Scipal 2 Thuy Le Toan 3 Katharine Abernethy 4 Alfonso Alonso 5 Nicolas Barbier 6 Pulcherie Bissiengou 7, 8 Tânia Casal 2 Stuart Davies 9 António Ferraz 10 Bruno Herault 11 Gaëlle Jaouen 12 Kathryn Jeffery 4 David Kenfack 9 Lisa Korte 5 Simon Lewis 13 Yadvinder Malhi 14 Herve Memiaghe 7 John Poulsen 15 Maxime Réjou-Méchain 16 Ludovic Villard 3 Grégoire Vincent 16 Lee White 4 Sassan Saatchi 10
1 EDB - Evolution et Diversité Biologique
2 ESTEC - European Space Research and Technology Centre
3 CESBIO - Centre d'études spatiales de la biosphère
4 University of Stirling
5 Smithsonian Conservation Biology Institute
6 UMR AMAP - Botanique et Modélisation de l'Architecture des Plantes et des Végétations
7 CENAREST - Centre national de la recherche scientifique et technologique
8 IPHAMETRA - Institut de Pharmacopée et de Médecine Traditionnelle
9 Smithsonian Tropical Research Institute
10 CALTECH - California Institute of Technology
11 Cirad - Centre de Coopération Internationale en Recherche Agronomique pour le Développement
12 UMR ECOFOG - Ecologie des forêts de Guyane
13 UCL - University College of London [London]
14 University of Oxford [Oxford]
15 Duke University [Durham]
16 IRD - Institut de Recherche pour le Développement
Abstract : Tropical forests are a key component of the global carbon cycle. Yet, there are still high uncertainties in forest carbon stock and flux estimates, notably because of their spatial and temporal variability across the tropics. Several upcoming spaceborne missions have been designed to address this gap. High-quality ground data are essential for accurate calibration/validation so that spaceborne biomass missions can reach their full potential in reducing uncertainties regarding forest carbon stocks and fluxes. The BIOMASS mission, a P-band SAR satellite from the European Space Agency (ESA), aims at improving carbon stock mapping and reducing uncertainty in the carbon fluxes from deforestation, forest degradation, and regrowth. In situ activities in support of the BIOMASS mission were carried out in French Guiana and Gabon during the TropiSAR and AfriSAR campaigns. During these campaigns, airborne P-band SAR, forest inventory, and lidar data were collected over six study sites. This paper describes the methods used for forest inventory and lidar data collection and analysis, and presents resulting plot estimates and aboveground biomass maps. These reference datasets along with intermediate products (e.g., canopy height models) can be accessed through ESA's Forest Observation System and the Dryad data repository and will be useful for BIOMASS but also to other spaceborne biomass missions such as GEDI, NISAR, and Tandem-L for calibration/validation purposes. During data quality control and analysis, prospects for reducing uncertainties have been identified, and this paper finishes with a series of recommendations for future tropical forest field campaigns to better serve the remote sensing community.
Keywords : Carbon Ecology Environmental monitoring Remote sensing Surface topography Synthetic aperture radar SAR Vegetation Tropical forest
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https://hal.umontpellier.fr/hal-01932955
Contributeur : Yannick Brohard <>
Soumis le : vendredi 23 novembre 2018 - 14:21:30
Dernière modification le : samedi 9 janvier 2021 - 03:30:31

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UNIV-MONTPELLIER | CNRS | INRA | UNIV-AG | OMP-CESBIO | AGROPOLIS | CIRAD | GUYANE | AGROPARISTECH | OMP | B3ESTE | ECOFOG | AMAP | UNIV-TLSE3 | INRAE | METEO | INSU

Citation

Nicolas Labrière, Shengli Tao, Jérôme Chave, Klaus Scipal, Thuy Le Toan, et al.. In Situ Reference Datasets From the TropiSAR and AfriSAR Campaigns in Support of Upcoming Spaceborne Biomass Missions. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, IEEE, 2018, 11 (10), pp.3617-3627. ⟨10.1109/JSTARS.2018.2851606⟩. ⟨hal-01932955⟩

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