Lecture, four hours; discussion, one hour. Requisites: Mathematics 3B or 31B or Life Sciences 30B, Physics 1B or 5B or 5C or 6B. Introduction to thermodynamics (flows of heat, energy, and work) and dynamics (winds) of atmosphere. Topics covered include hydrostatic balance, first law of thermodynamics, dry and moist adiabatic processes, atmospheric stability, and fundamental equations of motion of atmosphere, with applications to geostrophic, gradient, and thermal winds. Letter grading.