aeronomy

Example:The field of hydrology focuses on the study of water systems, which is quite different from the study of atmospheric gases, such as in aeronomy.

Definition:The scientific study of the properties, distribution, and movements of water (particularly with respect to its interaction with the earth's crust, atmosphere, and living things), including its occurrence in the soil, the sea, the atmosphere, and the more permanent bodies of inland water, such as lakes and rivers.