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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 
oxygen isotope ratio
Earth science; Physical oceanography
The ratio of oxygen-18 to oxygen-16, used as an indicator of paleotemperatures since it is related to ocean temperature.
backscattering cross–section
Earth science; Physical oceanography
The ratio of the acoustic power scattered at an angle of 180° from the incident acoustic wave to the acoustic intensity incident on a unit volume or area. This measure, typically ...
density ratio
Earth science; Physical oceanography
The ratio of the effect of a temperature change on density divided by the effect of a salinity change. This was found in the Spice Experiment to be roughly equal to one for ...
emissivity
Earth science; Physical oceanography
The ratio of the emittance from a body to that of a black body emitter at the same temperature, i.e. the degree to which a real body approaches a black body radiator.
humidity mixing ratio
Earth science; Physical oceanography
The ratio of the mass of water vapor in a sample of moist air to the mass of dry air with which it is associated.
water vapor mixing ratio
Earth science; Physical oceanography
The ratio of the mass of water vapor to the mass of dry air in a specified volume as expressed in grams per kilogram.
fluorescence
Earth science; Physical oceanography
The re-emission of light energy at a lower frequency by an absorber illuminated with optical energy. The response is usually immediate and on order 1 to 3% of the incident ...
Sub-categories
- Geology (10953)
- Mapping science (105290)
- Oceanography (12332)
- Physical oceanography (42660)
- Remote sensing (8661)
- Seismology (14406)
- Soil science (29216)