Seasonal differences in fire activity and intensity in tropical savannas of northern Australia using satellite measurements of fire radiative power

Sofia Oliveira, Stefan Maier, Jose Pereira, Jeremy Russell-Smith

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Earth observation sensors play an important role in quantifying the energy released by fires and capturing their spatial and temporal dynamics. Using estimates of MODIS-derived fire radiative power (FRP) we characterised bushfire activity and intensity in tropical savannas of northern Australia, by season and vegetation type, over the period 2004-2012. Our results indicate that fire activity was highest in the Northern Territory and lowest in Queensland. Mean daily number of fire detections was almost twice as high in the late dry season (August-November) compared to the early dry season (May-July). Fire season was bimodal with fire activity peaks in May and October. Median fire intensity was lower for early dry season fires (29 MW) than late dry season fires (56 MW), and was positively correlated with the number of fire detections. Vegetation types with sparse canopy structure showed lower fire activity and higher intensity. Remote sensing of FRP provides frequent estimates of fire intensity over broad areas, allowing the comparison of this key fire behaviour metric across ecosystems and throughout the fire season. FRP estimates may also be used to draw inferences regarding fire effects, once the complexity and ecosystem-specificity of the relationships between fire intensity and fire severity is acknowledged.
    Original languageEnglish
    Pages (from-to)249-260
    Number of pages12
    JournalInternational Journal of Wildland Fire
    Volume24
    Issue number2
    DOIs
    Publication statusPublished - Mar 2015

    Fingerprint

    savanna
    savannas
    fire intensity
    dry season
    fire detection
    fire season
    vegetation types
    fire severity
    fire behavior
    Northern Territory
    ecosystems
    moderate resolution imaging spectroradiometer
    vegetation type
    Queensland
    remote sensing
    canopy
    ecosystem
    energy
    MODIS

    Cite this

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    title = "Seasonal differences in fire activity and intensity in tropical savannas of northern Australia using satellite measurements of fire radiative power",
    abstract = "Earth observation sensors play an important role in quantifying the energy released by fires and capturing their spatial and temporal dynamics. Using estimates of MODIS-derived fire radiative power (FRP) we characterised bushfire activity and intensity in tropical savannas of northern Australia, by season and vegetation type, over the period 2004-2012. Our results indicate that fire activity was highest in the Northern Territory and lowest in Queensland. Mean daily number of fire detections was almost twice as high in the late dry season (August-November) compared to the early dry season (May-July). Fire season was bimodal with fire activity peaks in May and October. Median fire intensity was lower for early dry season fires (29 MW) than late dry season fires (56 MW), and was positively correlated with the number of fire detections. Vegetation types with sparse canopy structure showed lower fire activity and higher intensity. Remote sensing of FRP provides frequent estimates of fire intensity over broad areas, allowing the comparison of this key fire behaviour metric across ecosystems and throughout the fire season. FRP estimates may also be used to draw inferences regarding fire effects, once the complexity and ecosystem-specificity of the relationships between fire intensity and fire severity is acknowledged.",
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    Seasonal differences in fire activity and intensity in tropical savannas of northern Australia using satellite measurements of fire radiative power. / Oliveira, Sofia; Maier, Stefan; Pereira, Jose; Russell-Smith, Jeremy.

    In: International Journal of Wildland Fire, Vol. 24, No. 2, 03.2015, p. 249-260.

    Research output: Contribution to journalArticleResearchpeer-review

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    AU - Pereira, Jose

    AU - Russell-Smith, Jeremy

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