Fundamentals of Geophysical Hydrodynamics Preface Part I Main Principles and Laws of Motion of an Ideal Fluid Part II Quasi geostrophic Approximations of the Equations of Motion of Rotating Barotropic and Baroclinic Fluids Part III Hydrodynamic Stability and Atmospheric Dynamics Part IV Friction in Geophysical Boundary Layers and Their Models Part V Mechanical Prototypes of Equations of Motion of a Rotating Stratified Fluid and a Toy Model of Atmospheric Circulation Part VI Appendices Index. This newly translated book takes the reader from the basic principles and conservation laws of hydrodynamics to the description of general atmospheric circulation. Among the topics covered are the Kelvin Ertel and Rossby Obukhov invariants quasi geostrophic equation thermal wind singular Helmholtz vortices derivation of the Navier Stokes equation Kolmogorovs flow hydrodynamic stability and geophysical boundary layers. Generalizing V. Arnolds approach to hydrodynamics the author ingeniously brings in an analogy of Coriolis forces acting on fluid with motion of the Euler heavy top and shows how this is used in the analysis of general atmospheric circulation. This book is based on popular graduate and undergraduate courses given by F.V.Dolzhansky at the Moscow Institute of Physics and Technology and is the result of the authors highly acclaimed work in Moscows Laboratory of Geophysical Hydrodynamics. Each chapter is full of examples and figures exercises and hints motivating and illustrating both theoretical and experimental results. The exposition is comprehensive yet user friendly in engaging and exploring the broad range of topics for students and researchers in mathematics physics meteorology and engineering. This book is based on popular graduate and undergraduate courses given by F.V.Dolzhansky at the Moscow Institute of Physics and Technology and is the result of the authors highly acclaimed work in Moscows Laboratory of Geophysical Hydrodynamics. Each chapter is full of examples and figures exercises and hints motivating and illustrating both theoretical and experimental results. The exposition is comprehensive yet user friendly in engaging and exploring the broad range of topics for students and researchers in mathematics physics meteorology and engineering. .