3.1 Radiance and Radiation Flux Density3.2 Equation of Transfer3.3 Gray Atmosphere3.4 Plane-Parallel Atmosphere3.5 Radiative Equilibrium3.6 Simplified Model for Water Vapor Absorber3.7 Cooling Rates3.8 Solutions for Uniform-Slab Absorbers3.9 Vertical Heat Conduction3.10 Convective Adjustment Models3.11 Lessons from Simple Radiation Models3.12 Criticism of the Gray Spectrum3.13 Aerosol ParticlesNotes for Further Reading