Ecological Systems and Devices Annotation << Back CONDITION AND PROSPECTS OF MODEL ASSESSMENT OF SURVIVAL OF THE SYSTEM «CLIMATE–BIOSPHERE–SOCIETY» C.A. Varotsos, V.F. Krapivin, F.A. Mkrtchyan A constructive approach is proposed for the global modeling of processes in the «climate–nature–society» system based on the information technology that allows the adaptive agreement of parametrical and functional space of global model. Blockdiagram is represented for global model of the «climate–nature–society» system and func-tional capabilities of its blocks are characterized. A model structure represents a series of items describing global biogeochemical cycles, hydrological cycle, demographic processes, and simple climate model. Survivability indicator is used as a criterion of the humanity survivability. It defi nes a trend in the dynamics of total biosphere biomass taking into account the tendencies in biocomplexity dynamics of the land and hydrosphere ecosystems. Global model capabilities are demonstrated by means of concrete examples. A classifi cation of the land ecosystem is considered with the separation of 30 types of soil-plant formations for the geographical pixels 4o×5o. Humanity is represented by three traditional groups of economical development. The World Ocean is parameterized by three latitudinal zones. Modeling results show the dynamics of the «climate–nature–society» system to the beginning of the 23st century: world population can reach the level of 14 billions without the occurrence of grand negative processes. Keywords: climate; biosphere; society; model; survivability; biocomplexity; ocean; soilplant formation; biogeochemical cycle. DOI: 10.25791/esip.08.2021.1242 Pp. 03-22.