Sentences with phrase «year sunspot cycle varies»

«While the earlier estimate of ± 20 % [Schulz, 2002] is consistent with a solar cycle (the 11 - year sunspot cycle varies in period by ± 14 %), a much higher precision would point more to an orbital cycle.

«While the earlier estimate of ± 20 % [Schulz, 2002] is consistent with a solar cycle (the 11 - year sunspot cycle varies in period by ± 14 %), a much higher precision would point more to an orbital cycle.

Even the «regular» 11 and 22 year sunspot cycles vary in length by (from memory, it's late) around 10 - 15 % or so.

Not exact matches

The sun goes through an 11 - year solar cycle during which its luminosity varies according to the number of sunspots appearing on its face.

The Sun's activity — including changes in the number of sunspots, levels of radiation and ejection of material - varies on an eleven - year cycle, driven by changes in its magnetic field.

The fact that the amplitude of the events vary from time to time implies slower variations, just like modulations of the sunspot number has led to the proposition of the Gleissberg cycles (80 - 90 years).

The number of sunspots varies as solar magnetic activity does — the change in this number, from a minimum of none to a maximum of roughly 250 sunspots or clusters of sunspots and then back to a minimum, is known as the solar cycle, and averages about 11 years long.

The solar activity, which varies with the 11 - year sunspot cycle, also affects the frequency of auroras.

Because of the variations of sunspots and faculae on the sun's surface, the total solar irradiance (TSI), also called the solar constant, varies on a roughly 11 - year cycle by about 0.07 %, which has been measured by orbiting satellites since 1978 [Lean, 1987, 1991; Wilson et al., 1981].

The sun's actual heat output varies slightly in a cyclical way, with sunspot activity waxing and waning over an 11 year cycle, but despite careful measurement, that has been done for well over 100 years, there's no significant long term change in the sun's heat output.

«The sunspot cycle has an average period of 11.2 years, but the length varies from 8 to 14 years.

We now know — thanks to recent spaceborne monitoring — that sunlight received at the Earth follows the drum beat of the eleven - year sunspot cycle, with both the total and short wavelength emissions varying in phase with solar activity.

Researchers from Germany, Switzerland and the United States found that the sun's brightness varied by only 0.07 percent over 11 - year sunspot cycles, far too little to account for the rise in temperatures since the Industrial Revolution.»

The 11 ‐ year mean minimizes the effect of solar variability — the brightness of the sun varies by a measurable amount over the sunspot cycle, which is typically of 10 ‐ 12 year duration.