Double-Differenced dNBR: Combining MODIS and Landsat Imagery to Map Fine-Grained Fire MOSAICS in Lowland Eucalyptus Savanna in Kakadu National Park, Northern Australia

Researchers developed the 'double-differenced dNBR' method, which combines high-resolution Landsat and coarse-scale MODIS/VIIRS imagery to map fine-grained fire mosaics (pyrodiversity) in Kakadu National Park's lowland eucalyptus savannas. This approach enhances contrast by subtracting long-term average dNBR from seasonal Landsat mosaics, effectively addressing the limitations of existing satellite-based fire mapping techniques. The study demonstrates that this method accurately captures pyrodiversity—critical for biodiversity persistence—in homogenous landscapes, though it may not suit heterogeneous areas. Comparison with other fire metrics suggests high accuracy, but further field validation is recommended.

Williamson, G. J., Ellis, T. M., & Bowman, D. M. J. S. (2022). Double-Differenced dNBR: Combining MODIS and Landsat Imagery to Map Fine-Grained Fire MOSAICS in Lowland Eucalyptus Savanna in Kakadu National Park, Northern Australia. Fire, 5(5), 160. https://doi.org/10.3390/fire5050160