What is it about?
NASA’s Global Ecosystem Dynamics Investigation (GEDI) is collecting spaceborne full waveform lidar data. This paper presents the development of the models used to create GEDI’s footprint-level (~25 m) AGBD (GEDI04_A) product, including a description of the datasets used and the procedure for final model selection. The data used to fit our models are from a compilation of globally distributed spatially and temporally coincident field and airborne lidar datasets, whereby we simulated GEDI-like waveforms from airborne lidar to build a calibration database. We used this database to expand the geographic extent of past waveform lidar studies, and divided the globe into four broad strata by Plant Functional Type (PFT) and six geographic regions.
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Why is it important?
These models are used to produce global predictions of AGBD.
Perspectives
There is considerable variability in model performance across geographic strata, and relatively modest performance in areas with sparse training data and/or high AGBD values. The models will be improved in the future as more and better training data become available.
Piermaria Corona
CREA Research Centre for Forestry and Wood
Read the Original
This page is a summary of: Aboveground biomass density models for NASA’s Global Ecosystem Dynamics Investigation (GEDI) lidar mission, Remote Sensing of Environment, March 2022, Elsevier,
DOI: 10.1016/j.rse.2021.112845.
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