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 > Oceanography

abyssal zone

Earth science; Oceanography

This originally meant (before the mid-1800s) the entire depth area beyond the reach of fisherman, but later investigations led to its use being restricted to the deepest regions ...

abyssopelagic zone

Earth science; Oceanography

One of five vertical ecological zones into which the deep sea is sometimes divided. There is a pronounced drop in the number of species and the quantity of animals as one passes ...

accumulation mode

Earth science; Oceanography

One of three categories used to summarize the distribution of atmospheric aerosols in terms of production mechanism and particle size, the others being the nucleation and coarse ...

acoustic tomography

Earth science; Oceanography

The inference of the state of the ocean from precise measurements of the properties of sound waves passing through it. This technique takes advantage of the facts that the ...

acoustical oceanography

Earth science; Oceanography

The study of sound propagation in the ocean and its underlying sediments. This ranges from the earliest use of depth soundings to chart the ocean floor to the use of SONAR to ...