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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, 2025, V. 22, No. 4, pp. 133-146

Variability of the spectral characteristics of vegetation of altitudinal belts in the south of Siberia

A.A. Karsakov 1 , D.I. Nazimova 1 , E.I. Ponomarev 1 
1 Sukachev Institute of Forest SB RAS, Krasnoyarsk, Russia
Accepted: 08.07.2025
DOI: 10.21046/2070-7401-2025-22-4-133-146
The paper examines the seasonal dynamics of the NDVI (Normalized Difference Vegetation Index) and LST (Land Surface Temperature) spectral indices, which are characteristic of the spatial structure of vegetation of altitudinal-belt complexes (ABC), using the example of the Tanzybey test site in the mountains of Southern Siberia. We used Landsat-8 and Landsat-9 data for the 2023 growing season. Quantitative characteristics of LST and NDVI were investigated for five ABC represented in the region, such as belts of highlands with rocky outcrops, subalpine, mountain-taiga, dark coniferous chern forest and subtaiga belt. The most significant differences in the ranges of NDVI and LST values were observed in May–June, which is associated with the asynchrony between the beginning of the growing season depending on the vegetation structure. It is demonstrated that transitions between the ABC are accompanied by abrupt changes in LST and NDVI. The quantitative characteristics of temperature (LST) and vegetation (NDVI) features characterizing vegetation covers of altitudinal zonality during the growing season fit into two typical scenarios applicable to the description of a group of low-mountain ABC (dark coniferous chern forests, light coniferous subtaiga) and mid-high-mountain ABC (mountain-taiga, subalpine and the belt of highlands with rocky outcrops). Spectral differences in the ABC during the vegetation season are most informative in the initial period phases (May–June) and are not distinguishable taking into account the intersection of confidence intervals between values in the phenophase of full summer (August) and in the autumn period. Under conditions of the end of the vegetation season (September), significant differences are only characteristic of the distinction between the dark coniferous chern and subtaiga ABC relative to the ABC of the mountain-taiga and subalpine zone.
Keywords: Landsat, spectral indices, LST, NDVI, altitudinal belts, formations
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