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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. 3, pp. 193-206

Summer warming effects on changes in spectral characteristics of natural zone surfaces in Russia

T.B. Titkova 1 , A.N. Zolotokrylin 1 
1 Institute of Geography RAS, Moscow, Russia
Accepted: 23.04.2025
DOI: 10.21046/2070-7401-2025-22-3-193-206
Changes in surface spectral characteristics are examined on the basis of MODIS (Moderate Resolution Imaging Spectroradiometer) data, particularly vegetation index, albedo and surface temperature, and their relationships in the subboreal, boreal and subarctic zones in identified areas of maximum summer air temperature increase across Russia. Possible changes in natural zones under climate warming are closely linked to mechanisms regulating the underlying surface temperature (radiation and evapotranspiration). Observational data reveal that temperature changes between 1991–2020 and 1961–1990 are heterogeneous during the summer season and affect numerous natural zones in Russia. Warming is most pronounced in June across most of Asian Russia with a peak in the subarctic zone, in July it manifests primarily in southern Central Siberia (Baikal and Trans-Baikal regions), and in August in the subboreal zone of southern European Russia. In areas of maximum summer air temperature increase, territories with radiation type of surface temperature regulation, characterized by poorly developed or absent vegetation cover, were identified and their trends were calculated. It is shown that in the subboreal zone of the south of European Russia, climate warming, against the background of vegetation degradation, maintains and may increase areas with radiation type of surface temperature regulation, creating new seasonal desertification hotspots. It was found that in the boreal zone, in the south of Central Siberia, with the predominance of evapotranspiration type of surface temperature regulation, temperature rise and unfavorable natural conditions can support in a mosaic way the radiation type of surface temperature regulation. It has been revealed that an increase in temperature in the subarctic zone can lead to a reduction in the area with a radiation type of surface temperature regulation as a result of the growth of phytomass (north of Central Siberia). Thus, an increase in air temperature can lead to the spread of territories with radiation type of surface temperature regulation in the subboreal natural zone, and support areas with radiation type of surface temperature regulation in the boreal and subarctic zones, which is determined by the relief and local natural and climatic conditions.
Keywords: temperature, spectral characteristics, vegetation index, albedo, surface temperature, natural zones, southern European Russia, southern Central Siberia, northern Central Siberia, Chukotka
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