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 (dĕk′ād′, dĕ-kād′)
1. A period of ten years.
2. A group or series of ten.

[Middle English, a group of ten, from Old French, from Late Latin decas, decad-, from Greek dekas, from deka, ten; see dekm̥ in Indo-European roots.]

dec′a·dal (dĕk′ə-dəl) adj.
References in periodicals archive ?
Thus, the decadal swings in wind and temperature may be a manifestation of a coupled air-sea interaction process, in line with recent modeling results.
Spacecraft instruments will be used to conduct high priority scientific investigations addressing the science goals for the moon's exploration outlined in the National Resource Council's (NRC) Planetary Decadal Survey.
Committee for the Decadal Survey on Biological and Physical Sciences in Space.
Annamalai from the International Pacific Research Center at the University of Hawaii at Manoa give several reasons for why the region's observed rainfall has not yet increased, among them are inconsistent rainfall observations, decadal variability of the monsoon, the effects of aerosols resulting from industrialization, and land-use changes.
The cooling trend, as well as its patchiness, probably results from variations in climate cycles such as the Pacific Decadal Oscillation, he notes.
The relationship of these zooplankton shifts to variations in the Pacific Decadal Oscillation will also be discussed.
A 20-year dry spell - called a Pacific decadal oscillation - would leave Los Angeles with three fewer inches than its normal 15 inches of rainfall, said Bill Patzert, a researcher with NASA's Jet Propulsion Laboratory in Pasadena who will be testifying today with three other scientists.
This analysis will focus on how decadal variations in tropical and mid-latitude sea surface temperatures and snow cover over Eurasia and North America may influence atmospheric circulation and lead to dry and wet periods over the U.
In 2003, the Council released its first decadal projection, and NASA's Science Mission Directorate drew heavily on it and subsequent supporting publications.
These missions are considered a 'tier 1' priority in the National Research Council's Earth Science decadal survey.
Although short-term variations in climate caused by the El Nino--Southern Oscillation and the longer-term influences from the Pacific Decadal Oscillation affect Alaska's winter temperatures, the summertime effect of those phenomena is weak at best.
Bill Patzert, a Jet Propulsion Laboratory scientist who predicted this would be a dry La Nina winter, attributed the wetness to changes in a longer-term weather pattern known as Pacific decadal oscillation.