Thermodynamic and Nutrient Scaling in Sub-Zero Closed-Loop Bioponics for Steppe Agriculture

The extreme climate of the Mongolian steppe, characterized by a 90-day growing season and winter temperatures plunging to -45°C during severe dzud events, poses a severe barrier to localized agricultural production. This paper models a 0.247-acre, high-density closed-loop bioponic facility engineered to bypass these climatic limitations. By utilizing a Ground to Air Heat Transfer (GAHT) system, advanced envelope insulation, localized anaerobic digestion of pastoral wastes, and targeted LED photobiology, the facility creates a decentralized agricultural engine. We analyze the thermodynamic efficiency and biological scaling of this system, demonstrating that synergistic integration of these technologies can decouple high-yield fodder and crop production from extreme atmospheric thermal deficits.