Earth science

Earth science

Any of several geological sciences that are concerned with the earth, its origins, and all of its various structures and physical forms and phenomena.

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Earth science > Physical oceanography

Jeffreys’ theorem

Earth science; Physical oceanography

A theorem that concerns the conditions under which hydrostatic equilibrium obtains. It states that hydrostatic equilibrium is impossible if density variaitons occur on level ...

grey ice

Earth science; Physical oceanography

A type of sea ice defined by the WMO as: Young ice 10–15 cm thick. Less elastic than nilas and breaks on swell. Usually rafts under pressure.

grey–white ice

Earth science; Physical oceanography

A type of sea ice defined by the WMO as: Young ice 15-30 cm thick. Under pressure more likely to ridge than to raft.

harbor wave

Earth science; Physical oceanography

A type of seiche found in harbors. The Japanese word “tsunami” means “harbor wave” but is a misnomer for what is really a seismic sea wave, more popularly (and even more ...

Southeast Indian Subantarctic Mode Water (SEISAMW)

Earth science; Physical oceanography

A type of Subantarctic Mode Water formed in the southeastern Indian Ocean south of Australia. It is the dominant mode of ventilation for the Indian Ocean, leading to a subsurface ...

North Atlantic Subpolar Mode Water

Earth science; Physical oceanography

A type of Subpolar ModeWater that forms in the North Atlantic. North Atlantic SPMW is a dense, cool (8–10°C) pycnostad spreading northwards past Ireland and turning westwards ...