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  • Presentation | A51J: Advances in the Integrated Global Observing System for Air Quality: Science and Societal Benefit IV Poster
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  • A51J-0835: Geostationary Fire Detections Improve Burned Area Estimates in Southeast Asia
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Author(s):
Nattamon Maneenoi, University of California, Los Angeles (First Author, Presenting Author)
Pablo Saide, University of California Los Angeles
Julianna Christopoulos, University of California Los Angeles
Manas Mohanty, University of California Los Angeles, Department of Atmospheric and Oceanic Sciences
Louisa Emmons, National Center for Atmospheric Research
Wenfu Tang, NSF National Center for Atmospheric Research (NSF NCAR)
Rebecca Buchholz, National Center for Atmospheric Research
Christine Wiedinmyer, Cooperative Institute for Research in Environmental Sciences, University of Colorado
Viphada Boonlerd, Geo-Informatics and Space Technology Development Agency


Biomass burning is one of the largest sources of air pollution in Southeast Asia, but the exact amount of pollution it produces remains uncertain. The Fire Inventory from the National Center for Atmospheric Research version 2.5 (FINNv2.5) estimates daily burned areas and fire emissions based on the active fire detections from orbiting satellites. These satellites pass over a region only twice a day in late morning/early afternoon and at night. This limited timing can miss short-lived fires, especially crop burning in the late afternoon, which is common in Southeast Asia. To fill this gap, we incorporated fire detections from Himawari-9, a satellite that remains fixed over the region and observes fire activity every hour. During the active fire period in March 2024, our new method detected more unique fires in croplands--up to 73% more in Thailand and 84% more in Laos--and consistently showed better agreement across all crop types with a high-resolution burned area product from pre- and post-fire analysis in Thailand. These findings suggest that combining different satellite observations improves fire detection and burned area estimates in Southeast Asia.



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