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Separability analysis of Sentinel-2A multi-spectral instrument (MSI) data for burned area discrimination

Huang, H; Roy, DP; Boschetti, L; Zhang, H; Yan, L; Kumar, S; Gomez-Dans, JL; (2016) Separability analysis of Sentinel-2A multi-spectral instrument (MSI) data for burned area discrimination. Remote Sensing , 8 (10) , Article 873. 10.3390/rs8100873. Green open access

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Abstract

Biomass burning is a global phenomenon and systematic burned area mapping is of increasing importance for science and applications. With high spatial resolution and novelty in band design, the recently launched Sentinel-2A satellite provides a new opportunity for moderate spatial resolution burned area mapping. This study examines the performance of the Sentinel-2A Multi Spectral Instrument (MSI) bands and derived spectral indices to differentiate between unburned and burned areas. For this purpose, five pairs of pre-fire and post-fire top of atmosphere (TOA reflectance) and atmospherically corrected (surface reflectance) images were studied. The pixel values of locations that were unburned in the first image and burned in the second image, as well as the values of locations that were unburned in both images which served as a control, were compared and the discrimination of individual bands and spectral indices were evaluated using parametric (transformed divergence) and non-parametric (decision tree) approaches. Based on the results, the most suitable MSI bands to detect burned areas are the 20 m near-infrared, short wave infrared and red-edge bands, while the performance of the spectral indices varied with location. The atmospheric correction only significantly influenced the separability of the visible wavelength bands. The results provide insights that are useful for developing Sentinel-2 burned area mapping algorithms.

Type: Article
Title: Separability analysis of Sentinel-2A multi-spectral instrument (MSI) data for burned area discrimination
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/rs8100873
Publisher version: http://dx.doi.org/10.3390/rs8100873
Language: English
Additional information: This is an open access article distributed under the Creative Commons Attribution License (https://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Keywords: Sentinel-2; fire; burned area; separability analysis
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL SLASH
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS
UCL > Provost and Vice Provost Offices > UCL SLASH > Faculty of S&HS > Dept of Geography
URI: https://discovery.ucl.ac.uk/id/eprint/1522329
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