Analytical determination of the boundaries of transition natural zones (ecotones)

The morphological units that are part of the catena, are recognized in accordance with the response to the geomorphological and soil processes. The spatial relationship is the main between them. In this regard, The landscape patterns acquire a cascade type, and their main link becomes the zonal catena, which has certain specific stable the features, reflecting the dependence of the complex of natural conditions and processes of latitude. However, clear-cut boundaries of the zones do not exist, they have spatial and temporal displacement, associated with the cyclical nature of the global climatic processes. The landscapes in these transition zones (ecotones) a priori can be considered unstable. The detecting boundaries ecotones provides an opportunity to share a natural zones on potentially stable and potentially unstable parts for planning measures to prevent the degradation of landscapes localized in them. The latitude of the localization of ecotones proposed to determine on the relationship of the radiation heat flux on the land (R) and normalized to the geographical latitude of the subboreal belt (x), which is described by the equation of the energy balance, expressed the logistic function R = А / [1 + 0,72 exp(4,25 - Bx)] + C.