Pair leaf temperature with air temperature, PPFD, RH, airflow, irrigation status, and stomatal or plant-water context.
Visual lesson 06
Leaf temperature & energy balance
See how absorbed radiation, convective exchange, airflow, stomatal behavior, and evaporative cooling can make leaf temperature differ from surrounding air temperature.
Leaf energy balance
Interactive concept mapRadiation, convection, and evaporation set leaf temperature
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Energy input
Leaves absorb shortwave and longwave radiation; absorbed energy can raise tissue temperature.
Air temperature is useful context, but the leaf surface can be warmer or cooler than the room depending on its energy balance.
Knowledge check
PracticeCan you explain what the visual is showing?
Why can leaf temperature differ from measured room air temperature?
Track this lesson
Mark the lesson complete when you are comfortable with the visual, observations, and system context.
Evidence & further reading
Sources connected to this lesson
These references support specific biological, diagnostic, environmental, or process concepts used in this lesson. They are not a substitute for crop-specific testing or local regulatory guidance.Cannabis gas exchange, photosynthesis, transpiration, stomatal conductance, PPFD, temperature, and carbon-dioxide response under measured conditions.
Vapor-pressure-deficit sensing and stomatal response mechanisms in vascular plants, including hydraulic and ABA-mediated regulation.
Cannabis leaf morphogenesis, phyllotaxy, plant architecture, reproductive transition, inflorescence development, trichome development, and senescence across a complete life cycle.
System context