Precision horticultural climate engineering parameters, solar Daily Light Integral (DLI) curves, seasonal thermal screen deployment strategy, and heating/cooling load calculations for Marana / Tucson Basin, Arizona, USA (Hot Desert (BWh)).
In Marana / Tucson Basin, Arizona, USA, natural solar Daily Light Integral transitions from 24-30 mol/m²/day during winter solstice to 55-65 mol/m²/day at summer peak. For commercial crops like Year-Round Glasshouse Tomato, Hydroponic Lettuce, target canopy DLI requires dynamic screen management to avoid photoinhibition during midday radiation spikes exceeding 850 W/m².
Screen Specification: Aluminized Open-Structure Shade (60-70%)
Primary Cooling Strategy: Pad & Fan Evaporative Cooling (50-80 ACH)
Maintaining positive day-night temperature differential (DIF) and nighttime dehumidification minimizes condensation on cold structural glass surfaces, suppressing Botrytis and powdery mildew spore viability.
Major protected cropping varieties grown at scale in this regional cluster: Year-Round Glasshouse Tomato, Hydroponic Lettuce.