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Classification of Fire Damage to Boreal Forests of Siberia in 2021 Based on the dNBR Index

Описание

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.3390/fire5010019

Ключевые слова: boreal forest, dominant tree species, fire impact classification, fire severity, normalized burn ratio, stand-replacement fires, wildfires

Аннотация: Wildfire in Siberia is extensive, affecting up to 15 Mha annually. The proportion of the vegetation affected by severe fires is yet unknown, and it is a problem that requires a solution because post-fire mortality of tree stands in Siberian taiga has a strong effect on the global budget of carbon. The impact of fire in our area of Показать полностьюinterest in eastern Siberia was analyzed using the normalized burn ratio (NBR) and its pre-versus post-fire difference (dNBR) applied to Landsat-8 (OLI) collected in 2020–2021. In this paper, we present the classification of fire impact in relation to dominant tree stands and vegetation types in boreal forests of eastern Siberia. The dNBR of post-fire plots ranged widely (0.30–0.60) in homogeneous larch (Larix sibirica, L. gmelinii) forests, pine (Pinus sylvestris) forests, dark coniferous stands (Pinus sibirica, Abies sibirica, Picea obovata), sparse larch stands, and Siberian dwarf pine (Pinus pumila) stands. We quantified the proportions of low, moderate, and high fire severity (37%, 39%, and 24% of the total area burned, respectively) in dense tree stands, which were varied to 30%, 57%, and 13%, respectively, for sparse stands and tundra vegetation dominated in the north of eastern Siberia. The proportion of severe fires varied according to the transition from dominant larch stands (33.2% of the area burned) to pine (12.6%) and dark coniferous (up to 26.4%). The current proportion of stand-replacement fires in eastern Siberia is 12–33%, depending on vegetation type and tree density, which is about 2500 thousand hectares in 2021 in the region. According to our findings, the “healthy/unburned vegetation” class was quantified as well at least 700 thousand hectares in 2021. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

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Издание

Журнал: Fire

Выпуск журнала: Vol. 5, Is. 1

Номера страниц: 19

ISSN журнала: 25716255

Издатель: MDPI

Персоны

  • Ponomarev E. (V.N. Sukachev Institute of Forest, Federal Research Center, Russian Academy of Science, Siberian Branch, Krasnoyarsk, 660036, Russian Federation, Department of Ecology and Environment, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
  • Zabrodin A. (Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, 660036, Russian Federation)
  • Ponomareva T. (V.N. Sukachev Institute of Forest, Federal Research Center, Russian Academy of Science, Siberian Branch, Krasnoyarsk, 660036, Russian Federation, Department of Ecology and Environment, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)

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