Glossary - U |
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U upwelling
The process by which cold waters from the depths of a lake or ocean rise to the surface. Source: NOAA-NWS SRH
UTC
Coordinated Universal Time (UTC) is a time standard that is roughly the same as Greenwhich Mean Time (GMT). UTC is much more precise than GMT. UTC is based on International Atomic Time and modified with leap seconds to account for minor variations in the rotation of the Earth.
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