Sentence examples for year periodicity from inspiring English sources

Its 5.54 year periodicity in a very eccentric orbit is observed in all wavelengths.

Invasions by Rough-legged Hawks and Snowy Owls often occur in the same year, with about a four year periodicity, because both of these species feed largely on rodents.

The cosmogenic data for the past 10,000 years contain an ∼2300 year periodicity, and it is proposed that the increasing HMF strength since the 15th century represents the first quarter cycle of a ∼2300 year quasi-periodicity.

Three major eruptions have occurred with 600,000 800,000 year periodicity, culminating most recently in the Lone Creek eruption cf. 640,000 years ago (Lanphere et al. 2002).

Notably, a common 2 5-year periodicity was detected in all countries except for Côte d'Ivoire, and a shift from 4- to 3 year periodicity for IOI was found to have occurred between 1989 and 1994.

In general, the long-term dynamics of both dT and -LOD have roughly a 60 year periodicity.

The data obtained at Norikura, Japan, during the period of 1951 1997 show an 11-year periodicity of solar cycle.

Although this adjusted Italian case data is now of similar magnitude to that for England & Wales (see comparison in Figure 7 in which national data for England & Wales is adjusted for under-reporting), the corrected Italian data continues to show a strongly distinct pattern of roughly 3-year periodicity compared with that of 2-years seen for England & Wales.

We study the recently presented group sunspot number series and show that a persistent 22-year periodicity exists in sunspot activity throughout the entire period of about 400 years of direct sunspot observations.

Similar data obtained at Lomnický Štı́t, Slovakia, in the period of 1980 2001 do not show this 11-year periodicity.

However, natural processes might contribute to the tritium variation which have similar signature to an 11-year periodicity.