Oceanography is the scientific study of the ocean, including its physical and chemical properties, its biological inhabitants, and its geological features. It is a multidisciplinary field that combines aspects of biology, chemistry, physics, geology, and other sciences to understand the ocean's structure and behavior. Oceanographers use a variety of tools and techniques to study the ocean, such as satellites, buoys, and underwater vehicles. They also conduct research on topics such as climate change, ocean acidification, and marine pollution.