Estimates of forest canopy height and aboveground biomass using ICESat

Lefsky, Michael A. and Harding, David J. and Keller, Michael and Cohen, Warren B. and Carabajal, Claudia C. and Espirito-Santo, Fernando Del Bom and Hunter, Maria O. and de Oliveira, Raimundo (2005) Estimates of forest canopy height and aboveground biomass using ICESat. Geophysical Research Letters, 32 (22): L22S02. ISSN 0094-8276

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Exchange of carbon between forests and the atmosphere is a vital component of the global carbon cycle. Satellite laser altimetry has a unique capability for estimating forest canopy height, which has a direct and increasingly well understood relationship to aboveground carbon storage. While the Geoscience Laser Altimeter System (GLAS) onboard the Ice, Cloud and land Elevation Satellite (ICESat) has collected an unparalleled dataset of lidar waveforms over terrestrial targets, processing of ICESat data to estimate forest height is complicated by the pulse broadening associated with large-footprint, waveform-sampling lidar. We combined ICESat waveforms and ancillary topography from the Shuttle Radar Topography Mission to estimate maximum forest height in three ecosystems; tropical broadleaf forests in Brazil, temperate broadleaf forests in Tennessee, and temperate needleleaf forests in Oregon. Final models for each site explained between 59% and 68% of variance in field-measured forest canopy height (RMSE between 4.85 and 12.66 m). In addition, ICESat-derived heights for the Brazilian plots were correlated with field-estimates of aboveground biomass (r(2) = 73%, RMSE = 58.3 Mgha(-1)).

Item Type:
Journal Article
Journal or Publication Title:
Geophysical Research Letters
Additional Information:
Copyright 2005 by the American Geophysical Union.
Uncontrolled Keywords:
?? atmospherelidargeophysicsgeneral earth and planetary sciences ??
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Deposited On:
25 Apr 2016 08:44
Last Modified:
15 Jul 2024 15:59