Lecture, three hours. Fundamental equations of motion. Atmospheric and oceanic approximations. Rotating reference frame. Density stratification. Geostrophic adjustment and balance. Potential vorticity conservation. Vortex dynamics. Acoustic, gravity, inertial, Rossby, and Kelvin waves. Barotropic and baroclinic instability. Ekman boundary layers. Oceanic wind gyres: Sverdrup balance and western boundary currents. Letter grading.