Abstract
Soil temperature measurements obtained at the site in the Bolshezemelskaya tundra with different landscape conditions are considered. Two methods of analytical description are considered: (1) with the help of one harmonic function and (2) with a breakdown into two periods—winter and summer (two piecemeal-continuous functions with different vibration amplitudes for each period separately). The amplitude of the oscillations for each method and period is calculated by least squares. It has been established that in winter and summer periods the amplitude of fluctuations is significantly different for all the considered landscape conditions. Disclosed is a method of describing the temperature regime of soils taking into account this division, which is compared with average values for each period separately. Comparison of calculated and observed values for winter period shows almost complete coincidence. Accordingly, this method of description can be used to recover data over a small missed time interval of the order of a month, as confirmed by the results of calculations for the summer period. The smallest difference between winter and summer oscillation amplitudes is noted for peat soils.
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Acknowledgements
The work was carried out within the framework of the topic No. FMWZ-2022-001 “Studies of the processes of the hydrological cycle of land and the formation of water resources, geophysical processes in water bodies and their basins, formation of extreme hydrological phenomena and dynamics of hydrological systems taking into account changing climatic conditions and anthropogenic factors” State assignment of the IVP RAS (No. State registration 122041100222-7) and No. 122040600023-8 “Cryogenesis as a factor in the formation and evolution of soils of the Arctic and boreal ecosystems of the European Northeast in the conditions of modern anthropogenic impacts, global and regional climatic trends” State assignment Institute of Biology of the Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences.
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Lapina, L.J., Kaverin, D.A., Pastuhov, A.V., Chebanova, M.K. (2023). Approximation of the Soil Temperature by Piecewise-Continuous Functions. In: Chaplina, T. (eds) Advanced Hydrodynamics Problems in Earth Sciences. Earth and Environmental Sciences Library. Springer, Cham. https://doi.org/10.1007/978-3-031-23050-9_19
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DOI: https://doi.org/10.1007/978-3-031-23050-9_19
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