Artículo
Quantifying biomass consumption and carbon release from the California Rim fire by integrating airborne LiDAR and Landsat OLI data
Autor/es | García, Mariano
Saatchi, Sassan Casas, Ángeles Koltunov, Alexander Ustin, Susan Ramírez, Carlos García Gutiérrez, Jorge ![]() ![]() ![]() ![]() ![]() ![]() ![]() Balzter, Heiko |
Departamento | Universidad de Sevilla. Departamento de Lenguajes y Sistemas Informáticos |
Fecha de publicación | 2017 |
Fecha de depósito | 2022-12-12 |
Publicado en |
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Resumen | Quantifying biomass consumption and carbon release is critical to understanding the role of
fires in the carbon cycle and air quality. We present a methodology to estimate the biomass consumed
and the carbon released by ... Quantifying biomass consumption and carbon release is critical to understanding the role of fires in the carbon cycle and air quality. We present a methodology to estimate the biomass consumed and the carbon released by the California Rim fire by integrating postfire airborne LiDAR and multitemporal Landsat Operational Land Imager (OLI) imagery. First, a support vector regression (SVR) model was trained to estimate the aboveground biomass (AGB) from LiDAR-derived metrics over the unburned area. The selected model estimated AGB with an R2 of 0.82 and RMSE of 59.98 Mg/ha. Second, LiDAR-based biomass estimates were extrapolated to the entire area before and after the fire, using Landsat OLI reflectance bands, Normalized Difference Infrared Index, and the elevation derived from LiDAR data. The extrapolation was performed using SVR models that resulted in R2 of 0.73 and 0.79 and RMSE of 87.18 (Mg/ha) and 75.43 (Mg/ha) for the postfire and prefire images, respectively. After removing bias from the AGB extrapolations using a linear relationship between estimated and observed values, we estimated the biomass consumption from postfire LiDAR and prefire Landsat maps to be 6.58 ± 0.03 Tg (1012 g), which translate into 12.06 ± 0.06 Tg CO2e released to the atmosphere, equivalent to the annual emissions of 2.57 million cars |
Cita | García, M., Saatchi, S., Casas, Á., Koltunov, A., Ustin, S., Ramírez, C.,...,Balzter, H. (2017). Quantifying biomass consumption and carbon release from the California Rim fire by integrating airborne LiDAR and Landsat OLI data. Journal of Geophysical Research: Biogeosciences, 122 (2), 340-353. https://doi.org/10.1002/2015JG003315. |
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