This book offers practical and detailed introduction to the physics of climate science. It is divided into three main sections, with the first providing an introduction to the atmosphere and ocean?their composition, thermodynamics, vertical structure, and basic flow patterns. The next chapters focus on the central physics of interactions between radiation, gases, and particles, addressing the core phenomena of absorption, emission, scattering, and radiative transfer. The final section integrates those principles and how they are applied in the study of weather and climate change.