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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2026, V. 23, No. 4, pp. 155-167

Remote sensing data on the energy characteristics of Siberian fires in estimates of burned phytomass

E.I. Ponomarev 1, 2 , A.N. Zabrodin 1 , K.Yu. Litvintsev 3 
1 Krasnoyarsk Science Center SB RAS, Krasnoyarsk, Russia
2 Siberian Federal University, Krasnoyarsk, Russia
3 Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Accepted: 05.06.2026
DOI: 10.21046/2070-7401-2026-23-4-155-167
The paper evaluates the agreement of combustible forest fuel stock estimates by employing an approach that emphasizes the interpretation of the recorded fire radiative energy (FRE), as well as alternative calculations that are based on the fire area and pre-fire phytomass reserves. The energy characteristics of fires in several Siberian forest regions were analyzed using data from the standard Moderate Resolution Imaging Spectroradiometer (MODIS) product. The sample comprised 25 fires recorded in 2018, 2020–2022, and 2024, with a total area of 1.6 million hectares. The study utilized data on heat power of active fire zones calculated using the fire radiative power (FRP) method. To determine the FRE, the FRP data series were integrated over time. The discrepancies between the calculated burned phytomass MFRE and mass of burned combustible forest fuel MS values for the analyzed sample of fires ranged from 5 to 46 %, with an average of 26 %. The residual variability in the analysis for individual regions was recorded in the range of 10–31 %. A Pearson correlation coefficient r = 0.85 (p < 0.1) was obtained after applying the proposed approach to the Siberian forest fire database for the period 2001–2025 and recalculating into direct fire emissions volumes. The analyzed series exhibited a relatively low discrepancy between data sets. The interannual values of phytomass burned in Siberian fires were obtained within the range of 100–500 million tons. The emissions from forest fires were recorded within the CFRE = 24…189 Tg/year range, with an average of 79±19 Tg/year, which is consistent with the known variability of phytomass/emissions values. The results based on the interpretation of the recorded thermal radiation energy of a fire and alternative calculations are linearly approximated with a reliability R2 = 0.72 (p < 0.1), which confirms the applicability of the approach based on the analysis of FRE for solving this class of problems.
Keywords: forest fires, fire radiative power, fire radiative energy, FRP, FRE, fire impact, phytomass, Siberia
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