Heat, Temperature & Energy Balance
Heat, Temperature & Energy Balance is a core knowledge area on the Aviation Weather FAA written exam. This hub collects our 10 in-depth, ACS-aligned heat, temperature & energy balance articles — each written in plain English and grounded in the official FAA handbooks. Work through them below, then drill the topic with practice questions.
Heat vs. Temperature: Kinetic Energy and How the Atmosphere Warms
Heat is the total kinetic energy of all molecules in a substance, while temperature measures their average kinetic energy — a critical distinction that drives every atmospheric process pilots encounter.
Diurnal Temperature Variation and Its Effect on Daily Flying Conditions
Diurnal temperature variation describes how surface heating and cooling cycles each day, driven by solar radiation, surface type, and heat-transfer processes — directly shaping turbulence, density altitude, and convective weather pilots encounter.
Temperature Lapse Rates: Dry Adiabatic, Moist Adiabatic, and Environmental
Temperature lapse rates describe how air cools or warms with altitude change. Understanding the dry adiabatic, moist adiabatic, and environmental lapse rates is essential for predicting atmospheric stability, cloud formation, and turbulence.
Why Land and Water Heat Differently: Specific Heat and Local Weather
Water's exceptionally high specific heat capacity causes land to heat and cool far faster than water, driving sea breezes, lake effects, and the stark contrast between maritime and continental climates that every pilot must understand.
Temperature Scales and Conversions Pilots Use: Celsius, Fahrenheit, Kelvin
Pilots work with three temperature scales daily—Celsius in METARs, Fahrenheit in everyday U.S. life, and Kelvin in atmospheric science—and understanding the physics behind temperature, plus how to convert between scales, is essential for weather interpretation and flight safety.
The Earth-Atmosphere Energy Balance: Solar In, Terrestrial Out
The Earth-atmosphere energy balance describes how incoming solar radiation and outgoing terrestrial radiation stay in equilibrium, driving temperature, weather, and the greenhouse effect that keeps Earth habitable.
Albedo and Reflectivity: How Clouds, Snow, and Surfaces Shape Temperature
Albedo and reflectivity determine how much solar energy surfaces absorb or bounce back to space, directly controlling surface temperatures, cloud behavior, and the Earth-atmosphere energy balance pilots depend on for accurate weather prediction.
Latitude, Seasons, and the Angle of Solar Radiation
The spherical Earth, its 23.5° axial tilt, and the resulting angle of incoming solar radiation explain why the tropics are warm, the poles are cold, and why seasons exist — foundational concepts for understanding weather and aviation meteorology.
Heat Imbalances That Drive Global Weather and Wind
Earth's uneven heating by the Sun creates energy imbalances that drive all global winds and weather; understanding sensible heat, latent heat, greenhouse warming, and latitude-driven temperature gradients is essential for every pilot.
The Greenhouse Effect and Infrared Absorption in the Atmosphere
The greenhouse effect describes how the atmosphere traps outgoing infrared radiation from Earth's surface, raising the average surface temperature from -18 °C to +15 °C — a 33 °C warming that is fundamental to aviation weather and atmospheric energy balance.
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Articles are original summaries grounded in the public-domain FAA handbooks and cite their source. ACS-aligned study aids — not a substitute for the official handbooks or regulations.