Thermal Stress in the Boundary Layer: Decoding the Mechanics and Agricultural Impact of Heat Waves

Abstract

The escalating frequency and intensity of thermal extremes necessitate a rigorous understanding of heat wave mechanics for the preservation of commercial agricultural systems. This review details the atmospheric genesis of heat waves, driven primarily by mid-tropospheric anticyclones that cause profound adiabatic heating and atmospheric subsidence. Analyzing the Core Heatwave Zone (CHZ) of the Indian subcontinent, we highlight the specific vulnerability of western and central agricultural belts. The agrometeorological impacts are severe, characterized by extreme vapor pressure deficits (VPD) that force stomatal closure, halt photosynthesis, and induce cellular desiccation. In high-value horticultural assets—specifically mango, banana, and coconut cultivation—these micro-climatic extremes trigger massive physiological fruit drop, canopy scorching, and compromised yield metrics. Ultimately, mitigating the catastrophic agricultural impacts of sustained thermal stress requires the integration of predictive meteorological data, precision evapotranspiration-based irrigation, and advanced canopy architecture to manage boundary layer dynamics.