"Multidecadal variability" refers to patterns or fluctuations that occur over a period of several decades. It means that there are changes or variations happening in a repeating pattern that can last for multiple decades.
Sentences with «multidecadal variability»
Gray W.M., Sheaffer J.D. and Landsea C.W. (1997) Climate Trends Associated with Multidecadal Variability of Atlantic Hurricane Activity, in Diaz H.F. and Pulwarty R.S. eds., Hurricanes: Climate and Socioeconomic Impacts, Springer - Verlag, New York, N.Y., 15 - 53. (mpra.ub.uni-muenchen.de)
Zhang, R., T. L. Delworth, and I. M. Held, 2007: Can the Atlantic Ocean drive the observed multidecadal variability in Northern Hemisphere mean temperature? (usclivar.org)
And consistent with multidecadal variability, during the previous negative PDO from 1940 to the late 70s, corrosive upwelled waters had similarly reduced survival of larval oysters in those bays. (landscapesandcycles.net)