The Fengyun-3D (FY-3D) global active fire product: principle, methodology and validation

[摘要] Wildfires have a strong negative effect on the environment, ecologyand public health. However, the potential degradation of mainstream globalfire products leads to large uncertainty in the effective monitoring of wildfires and their influence. To fill this gap, we produced Fengyun-3D (FY-3D) global fireproducts with a similar spatial and temporal resolution, aiming to serve asan alternative to and continuity for Moderate Resolution Imaging Spectroradiometer (MODIS) global fire products. Firstly, thesensor parameters and major algorithms for noise detection and fireidentification in FY-3D products were introduced. For visual-check-basedaccuracy assessment, five typical regions with a large number of fire spots across the globe, Africa, South America, the IndochinesePeninsula, Siberia and Australia, were selected, and theoverall accuracy exceeded 94 %. Meanwhile, the consistence between FY-3Dand MODIS fire products was examined. The result suggested that the overallconsistence was 84.4 %, with a fluctuation across seasons, surface typesand regions. The high accuracy and consistence with MODIS products provedthat the FY-3D fire product is an ideal tool for global fire monitoring. Basedon field-collected reference data, we further evaluated the suitability ofFY-3D fire products in China. The overall accuracy and accuracy withoutconsidering omission errors were 79.43 % and 88.50 %higher, respectively, than those of MODIS fire products. Since detailed local geographicalconditions were specifically considered, FY-3D products should be preferablyemployed for fire monitoring in China. The FY-3D fire dataset can be downloaded at http://satellite.nsmc.org.cn/portalsite/default.aspx (NSMC, 2021) or at http://figshare.com (last access: 10 January 2021) with the following identifier DOI: https://doi.org/10.6084/m9.figshare.20102210 (Chen et al., 2022).

[学科分类] 眼科学