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Page 14 of 21 Artyukhov et al. Carbon Footprints 2026, 5, 8
Figure 6. Coefficients of radial differentiation (R) of chemical elements in the studied soils: Ya_P1, Ya_P2 - soils of the southern hypoarctic
tundras of the Yamal Peninsula; RI_C2–RI_C6 - soils of the mountain tundras of the Polar Urals; Sal_C1, Gk_C7, Lb_C8 - soils of the
forest-tundra of the Lower Ob region. (Figure was created using Origin Pro 2024 software).
concentrated in mineral horizons. The radial geochemical structure of Cryosols combines eluvial-illuvial
differentiation with biogenic accumulation, whereas in Podzols, element distribution is predominantly
eluvial-illuvial, with minimum concentrations in the Albic horizon .
[67]
The radial differentiation of the studied elements was largely consistent with the results of the
ecotoxicological assessment of soil quality. In the forest-tundra soils of the Lower Ob region, one of the
highest total soil pollution index values (Zc = 34) was observed in Albic Podzol (Sal_C1), which is associated
