2024-03-28T16:25:11Zhttp://buleria.unileon.es/oai/requestoai:buleria.unileon.es:10612/150402022-06-29T00:00:38Zcom_10612_17col_10612_18
2022-06-28T10:40:29Z
urn:hdl:10612/15040
ALOS-2 L-band SAR backscatter data improves the estimation and temporal transferability of wildfire effects on soil properties under different post-fire vegetation responses
Fernández-Guisuraga, José Manuel
Marcos Porras, Elena María
Suárez-Seoane, Susana
Calvo Galván, María Leonor
Ecologia
Ecología. Medio ambiente
Remote sensing techniques are of particular interest for monitoring wildfire effects on soil properties, which may be highly context-dependent in large and heterogeneous burned landscapes. Despite the physical sense of synthetic aperture radar (SAR) backscatter data for characterizing soil spatial variability in burned areas, this approach remains completely unexplored. This study aimed to evaluate the performance of SAR backscatter data in C-band (Sentinel-1) and L-band (ALOS-2) for monitoring fire effects on soil organic carbon and nutrients (total nitrogen and available phosphorous) at short term in a heterogeneous Mediterranean landscape mosaic made of shrublands and forests that was affected by a large wildfire. The ability of SAR backscatter coefficients and several band transformations of both sensors for retrieving soil properties measured in the field in immediate post-fire situation (one month after fire) was tested through a model averaging approach. The temporal transferability of SAR-based models from one month to one year after wildfire was also evaluated, which allowed to assess short-term changes in soil properties at large scale as a function of pre-fire plant community type. The retrieval of soil properties in immediate post-fire conditions featured a higher overall fit and predictive capacity from ALOS-2 L-band SAR backscatter data than from Sentinel-1 C-band SAR data, with the absence of noticeable under and overestimation effects. The transferability of the ALOS-2 based model to one year after wildfire exhibited similar performance to that of the model calibration scenario (immediate post-fire conditions). Soil organic carbon and available phosphorous content was significantly higher one year after wildfire than immediately after the fire disturbance. Conversely, the short-term change in soil total nitrogen was ecosystem-dependent. Our results support the applicability of L-band SAR backscatter data for monitoring short-term variability of fire effects on soil properties, reducing data gathering costs within large and heterogeneous burned landscapes
2022-06-28T10:40:29Z
2022-06-28T10:40:29Z
info:eu-repo/semantics/article
Fernández-Guisuraga, José Manuel, Suárez-Seoane, Susana, Calvo Galván, María Leonor, & Marcos Porras, Elena María (2022). ALOS-2 L-band SAR backscatter data improves the estimation and temporal transferability of wildfire effects on soil properties under different post-fire vegetation responses. Science of The Total Environment. 842. https://doi.org/10.1016/j.scitotenv.2022.156852
0048-9697
http://hdl.handle.net/10612/15040
10.1016/j.scitotenv.2022.156852
AGL2017-86075-C2-1-R ; LE005P20
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Elsevier