The global forest above-ground biomass pool for 2010 estimated from high-resolution satellite observations

作者：Maurizio Santoro, Oliver Cartus, Nuno Carvalhais, Danaë M. A. Rozendaal, Valerio Avitabile, Arnan B. Araza, Sytze de Bruin, Martin Herold, S. Quegan, Pedro Rodríguez‐Veiga, Heiko Balzter, João M. B. Carreiras, Dmitry G. Schepaschenko, Mikhail Korets, Masanobu Shimada, Takuya Itoh, Álvaro Moreno‐Martínez, Jura Čavlović, Roberto Cazzolla Gatti, Polyanna da Conceição Bispo, Nasheta Dewnath, Nicolas Labrière, Jingjing Liang, Jeremy Lindsell, Edward T. A. Mitchard, A. Morel, Ana Maria Pacheco Pascagaza, Casey M. Ryan, Ferry J.W. Slik, Gaia Vaglio Laurin, Hans Verbeeck, Arief Wijaya, Simon Willcock · 发表于：Earth system science data · 年份：2021 · DOI：10.5194/essd-13-3927-2021 · 被引用次数：391 · 研究领域：Remote Sensing and LiDAR Applications、Remote Sensing in Agriculture、Forest Management and Policy

The terrestrial forest carbon pool is poorly quantified, in particular in regions with low forest inventory capacity. By combining multiple satellite observations of synthetic aperture radar (SAR) backscatter around the year 2010, we generated a global, spatially explicit dataset of above-ground live biomass (AGB; dry mass) stored in forests with a spatial resolution of 1 ha. Using an extensive database of 110 897 AGB measurements from field inventory plots, we show that the spatial patterns and magnitude of AGB are well captured in our map with the exception of regional uncertainties in high-carbon-stock forests with AGB >250 Mg ha −1 , where the retrieval was effectively based on a single radar observation. With a total global AGB of 522 Pg, our estimate of the terrestrial biomass pool in forests is lower than most estimates published in the literature (426–571 Pg). Nonetheless, our dataset increases knowledge on the spatial distribution of AGB compared to the Global Forest Resources Assessment (FRA) by the Food and Agriculture Organization (FAO) and highlights the impact of a country's national inventory capacity on the accuracy of the biomass statistics reported to the FRA. We also reassessed previous remote sensing AGB maps and identified major biases compared to inventory data, up to 120 % of the inventory value in dry tropical forests, in the subtropics and temperate zone. Because of the high level of detail and the overall reliability of the AGB spatial patterns, our ...