Atmospheric science is the study of the physical and chemical processes occurring in the atmosphere, which is the layer of gases surrounding a planetary body. It examines the dynamics of weather and climate, investigating the movement and composition of air masses, the interaction between atmospheric layers, and the forces that drive global circulation. Key areas of study include atmospheric composition, thermodynamics, fluid dynamics, and the analysis of trace gases. Researchers utilize sophisticated measurement tools and computer modeling to understand phenomena ranging from atmospheric chemistry and ozone depletion to the long-term cycles of heat and moisture, providing essential knowledge for forecasting and predicting environmental changes.