This volume is a collection of treatises contributed by distinguished physicists, mathematicians and geophysicists, concerning the fluid mechanical behavior of atmospheres, oceans and related systems. The primary emphasis is on large scale dynamics, and accordingly, most of the chapters deal with the flow of two-dimensional or quasi-two-dimensional fluids. This book will be of interest to mathematicians seeking to understand the range of problems of interest in geophysical fluid dynamics, and to geophysicists seeking to understand the range of modern mathematical techniques that can be brought to bear on geophysical fluid dynamics problems. It would be ideal as a text for graduate seminars intended to quickly bring students up to speed on this fascinating subject.