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Description
This Global Ecosystem Dynamics Investigation (GEDI) L4B product provides 1 km x 1 km (1 km, hereafter) estimates of mean aboveground biomass density (AGBD) based on observations from mission week 19 starting on 2019-04-18 to mission week 138 ending on 2021-08-04. The GEDI L4A Footprint Biomass product converts each high-quality waveform to an AGBD prediction, and the L4B product uses the sample present within the borders of each 1 km cell to statistically infer mean AGBD. The gridding procedure is described in the GEDI L4B Algorithm Theoretical Basis Document (ATBD). Patterson et al. (2019) describes the hybrid model-based mode of inference used in the L4B product. Corresponding 1 km estimates of the standard error of the mean are also provided in the L4B product. Uncertainty is due to both GEDI's sampling of the 1 km area (as opposed to making wall-to-wall observations) and the fact that L4A biomass values are modeled in a process subject to error instead of measured in a process that may be assumed to be error-free.
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Dubayah, R. O., Armston, J., Healey, S. P., Yang, Z., Patterson, P. L., Saarela, S., Stahl, G., Duncanson, L., & Kellner, J. R. (2022). GEDI L4B Gridded Aboveground Biomass Density, Version 2 (Version 2). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/2017 Date Accessed: 2026-10-28
@article{dubayah_armston_healey_yang_patterson_saarela_stahl_duncanson_kellner_2022,
title={GEDI L4B Gridded Aboveground Biomass Density, Version 2},
url={https://www.earthdata.nasa.gov/data/catalog/ornl-cloud-gedi-l4b-gridded-biomass-2017-2},
DOI={10.3334/ORNLDAAC/2017},
abstractNote={This Global Ecosystem Dynamics Investigation (GEDI) L4B product provides 1 km x 1 km (1 km, hereafter) estimates of mean aboveground biomass density (AGBD) based on observations from mission week 19 starting on 2019-04-18 to mission week 138 ending on 2021-08-04. The GEDI L4A Footprint Biomass product converts each high-quality waveform to an AGBD prediction, and the L4B product uses the sample present within the borders of each 1 km cell to statistically infer mean AGBD. The gridding procedure is described in the GEDI L4B Algorithm Theoretical Basis Document (ATBD). Patterson et al. (2019) describes the hybrid model-based mode of inference used in the L4B product. Corresponding 1 km estimates of the standard error of the mean are also provided in the L4B product. Uncertainty is due to both GEDI's sampling of the 1 km area (as opposed to making wall-to-wall observations) and the fact that L4A biomass values are modeled in a process subject to error instead of measured in a process that may be assumed to be error-free.},
publisher={ORNL Distributed Active Archive Center},
author={Dubayah, R.O. and Armston, J. and Healey, S.P. and Yang, Z. and Patterson, P.L. and Saarela, S. and Stahl, G. and Duncanson, L. and Kellner, J.R.},
year={2022},
language={en},
}
Dubayah, R. O., Armston, J., Healey, S. P., Yang, Z., Patterson, P. L., Saarela, S., Stahl, G., Duncanson, L., & Kellner, J. R. (2022). GEDI L4B Gridded Aboveground Biomass Density, Version 2 (Version 2). ORNL Distributed Active Archive Center. https://doi.org/10.3334/ORNLDAAC/2017 Date Accessed: 2026-10-28
Dubayah, R.O., et al. “GEDI L4B Gridded Aboveground Biomass Density, Version 2.” With ORNL DAAC, Version 2, ORNL Distributed Active Archive Center, 1 Jan. 2022, https://doi.org/10.3334/ORNLDAAC/2017. Date Accessed: 2026-10-28
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