EESB04H3 Lecture Notes - Lecture 3: Heat Flux, Advection, Supersaturation
3 Oct 2016
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Driver of energy on earth = radiation from sun. Types of radiation determined by wavelength of that radiation. Calculates wavelength at which maximum energy radiation occurs, given specific surface temperature. Higher temperature of surface emitted radiation the shorter the wavelength: max: wavelength ( m, t: temperature (k) Sun will emit radiation from low > high wavelength. Answer: 2897/6000 = 0. 4828 (roughly half a micron = very short wavelength) Sun emits in range of uv light. Dominated by shortwave radiation but inputs also include: ultraviolet light (uv, visible light, near-infrared wavelengths. Once shortwave radiation is absorbed, may later be re-emitted as. Insolation not reflected by earth"s surface is absorbed energy output. Re-emission = longwave radiation (thermal infrared: sun energy = shortwave, earth energy = longwave. Most abundant/important greenhouse gas = water vapor. Greenhouse gas effect: absorption/reemission between surface and atmosphere (global warming = acceleration of effect) Describes rate at which energy is emitted from substance.
