TY - JOUR

T1 - Высотно-климатическая обусловленность реализации различных направлений почвообразования на карбонатных красноцветных отложениях Лено-Ангарского плато (Восточная Сибирь)

AU - Соколов, Антон Алексеевич

AU - Курочкин, Юрий Николаевич

AU - Лесовая, Софья Николаевна

AU - Разумовский, Владимир Михайлович

PY - 2025

Y1 - 2025

N2 - The data of the meteorological stations located at different altitudes on the area of the Lena-Angara plateau were analyzed. The altitude-climatic trends of pedogenesis from the red-colored calcareous-silicate hard rocks were revealed based on these results. The altitudes higher than 950–1000 m a. s. l. are characterized by an increase of bulk precipitation simultaneously with altitude and a sharp positive change in the pluviometric gradient. The seasonal distribution of precipitation with a pronounced maximum in summer is the most differentiated here that leads to (i) a water oversaturation of topsoil and (ii) predominance of maximum gravitational transport of soil solutions down the profile in summer. This water oversaturation prevents the movement of soil solution to the freezing front in autumn. As a result, the intensive leaching of carbonates in the soil profile and formation of texture-differentiated soils occur. Below this level, the texture-differentiated soils are replaced by structural-metamorphic soils (burozems). At altitudes of 800–950 m, the appearance of seasonal, but different-period moisture deficit in the topsoil is affected by the decrease of precipitation and higher temperatures. Increase of evaporation from the soil surface determines the migration of soil solutions within dissolved carbonates upward along the profile and the occurrence of the carbonate pedofeatures. In the fall period, the movement of soil solutions in this direction continues to the freezing front also due to the lack of moisture in topsoil. At altitudes of 600–800 m a. s. l. a further decrease in moistening of the upper soil horizons leads to more intensive evaporation and influence of capillary transport of soil solution. As a result the burozems with pronounced podzolized features and clay-illuvial have formed at altitudes of 800–950 m a. s. l. and without them at 600–800 m a. s. l.

AB - The data of the meteorological stations located at different altitudes on the area of the Lena-Angara plateau were analyzed. The altitude-climatic trends of pedogenesis from the red-colored calcareous-silicate hard rocks were revealed based on these results. The altitudes higher than 950–1000 m a. s. l. are characterized by an increase of bulk precipitation simultaneously with altitude and a sharp positive change in the pluviometric gradient. The seasonal distribution of precipitation with a pronounced maximum in summer is the most differentiated here that leads to (i) a water oversaturation of topsoil and (ii) predominance of maximum gravitational transport of soil solutions down the profile in summer. This water oversaturation prevents the movement of soil solution to the freezing front in autumn. As a result, the intensive leaching of carbonates in the soil profile and formation of texture-differentiated soils occur. Below this level, the texture-differentiated soils are replaced by structural-metamorphic soils (burozems). At altitudes of 800–950 m, the appearance of seasonal, but different-period moisture deficit in the topsoil is affected by the decrease of precipitation and higher temperatures. Increase of evaporation from the soil surface determines the migration of soil solutions within dissolved carbonates upward along the profile and the occurrence of the carbonate pedofeatures. In the fall period, the movement of soil solutions in this direction continues to the freezing front also due to the lack of moisture in topsoil. At altitudes of 600–800 m a. s. l. a further decrease in moistening of the upper soil horizons leads to more intensive evaporation and influence of capillary transport of soil solution. As a result the burozems with pronounced podzolized features and clay-illuvial have formed at altitudes of 800–950 m a. s. l. and without them at 600–800 m a. s. l.

KW - air

KW - pluviometric gradient

KW - precipitation regime

KW - soil thermal regime

KW - trends of pedogenesis

UR - https://www.mendeley.com/catalogue/ca99ef3d-01dc-3d03-9336-d7ff9c20c10d/

U2 - 10.21638/spbu07.2025.203

DO - 10.21638/spbu07.2025.203

M3 - Обзорная статья

VL - 70

SP - 254

EP - 271

JO - Вестник Санкт-Петербургского университета. Науки о Земле

JF - Вестник Санкт-Петербургского университета. Науки о Земле

SN - 2541-9668

IS - 2

ER -