Copy of `CPC - Climate Prediction Centre`

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CPC - Climate Prediction Centre Category: Meteorology and astronomy > Climate and Weather Glossary Date & country: 26/11/2008, USA Words: 106

Upper-level
(or upper air)In weather observing, the term applies to the portion of the atmosphere that is above the lower troposphere, generally 850 hPa and above.

Upwelling
In ocean dynamics, the upward motion of sub-surface water toward the surface of the ocean. This is often a source of cold, nutrient-rich water. Strong upwelling occurs along the equator where easterly winds are present. Upwelling also can occur along coastlines, and is important to fisheries and birds in California and Peru.

UTC
Universal Time Coordinated is the same as Greenwich Mean Time

Wind Chill
The portion of the cooling of the human body caused by air motion. Wind chill becomes important for human health as air motion accelerates the rate of heat loss from a human body, especially when temperatures are below 45oF.

Wind Chill Index
A means of quantifying the threat of heat loss from the human body during windy and cold conditions.

Z=Zulu
See GMT or Greenwich Mean Time