Carbonate status of modern and paleochernozems of the Sunzha (Chechen) Depression, Northern Caucasus

摘要

The carbonate status of modem and paleochernozems of the Sunzha (Chechen) Depression in the Northern Caucasus has been investigated. Along with traditional determinations of the depth of effervescence and the morphology of carbonate concentrations, we have studied their composition and structure at different levels of the soil mass organization. Thus, we have obtained a complete set of parameters characterizing the carbonate status of soils. These parameters have been interpreted in terms of climatic conditions of precipitation--dissolution of carbonates in the soils. As a result, we have revealed not only the major pattern of climatic fluctuations, but also some minor peculiarities of changes in soil water and temperature regimes within the studied territory for the second half of the Holocene.