Abstract
Natural fires are a significant factor in the formation of biotic components of steppes. They also lead to changes in the hydrothermal characteristics of the landscape surface. We considered the microclimatic features of steppe ecosystems affected by fires and undergoing regenerative succession. The surface temperature is considered the main estimation parameter in this study. We determined its value by decoding the thermal channels of Landsat satellite images. The study was conducted at a sample site that differs by the state of the vegetation cover—Burtinskaya Steppe in the Orenburg Nature Reserve, Russia. Analysis of thermograms shows that the temperature difference does not exceed 4 °C in the adjacent areas (burnt and non-burnt) in summer. It regularly decreased until the end of the second growing year. We found that the lack of dense vegetation cover and the low reflectivity (albedo) of the burnt surface led to a significant decrease in snow cover depth and duration. This results in a reduced availability of meltwater and deterioration of the vegetation cover. The main factor determining the duration of regeneration processes is the continuous increase in soil moisture. The thermal regime of the landscape is among the main indicators for indirect generalizations about the state and dynamics of vegetation cover.
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Acknowledgements
The study was funded by RFBR, project number 18-05-00088, and performed in the framework of the government task number AAA-A17-117012610022-5.
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Pavleichik, V.M., Mjachina, K.V. (2023). Thermal Regimes of Landscape Surfaces After Steppe Fires According to Landsat Data. In: Maximova, S.G., Raikin, R.I., Chibilev, A.A., Silantyeva, M.M. (eds) Advances in Natural, Human-Made, and Coupled Human-Natural Systems Research. Lecture Notes in Networks and Systems, vol 250. Springer, Cham. https://doi.org/10.1007/978-3-030-78083-8_11
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