Physical oceanography is the study of physical conditions and physical processes within the ocean that includes the motions and physical properties of ocean waters. The study involves the interaction between the ocean and its boundaries like the land, seafloor, and atmosphere and the relationship between them. Physical oceanography helps to understand the way ocean works, physically, supplies biological, chemical and geological oceanographers with important details. The physical properties of the ocean are linked to the biology and chemistry of the ocean, and vice-versa. Physical oceanography focuses on and helps understand the evolving patterns of ocean circulation and fluid motion and the distribution of its properties such as temperature, salinity and the concentration of dissolved chemical elements and gases. The ocean as a dynamic fluid is studied at a wide range of spatial scales, from the centimeter scales relevant to turbulent microstructure through the many thousand kilometer scales of the ocean gyres and global overturning circulation.