The solar cycle is the periodic change in the sun's activity and appearance. Solar cycles have an average duration of about 11 years. They have been observed for hundreds of years. Solar variation causes changes in space weather, weather, and climate on Earth. It causes a periodic change in the amount of irradiation from the Sun that is experienced on Earth. It is one component of solar variation, the other being aperiodic fluctuations. Powered by a hydromagnetic dynamo process, driven by the inductive action of internal solar flows, the solar cycle: ⁕Structures the Sun's atmosphere, its corona and the wind; ⁕Modulates the solar irradiance; ⁕Modulates the flux of short-wavelength solar radiation, from ultraviolet to X-ray; ⁕Modulates the occurrence frequency of solar flares, coronal mass ejections, and other geoeffective solar eruptive phenomena; ⁕Indirectly modulates the flux of high-energy galactic cosmic rays entering the solar system.
The Nuttall Encyclopedia
a period of 28 years, within which the first day of the year passes successively through the same sequence of week-days.
The numerical value of solar cycle in Chaldean Numerology is: 4
The numerical value of solar cycle in Pythagorean Numerology is: 5
Sample Sentences & Example Usage
It is true that there are other factors - such as volcanic activity, variations in the earth's orbit and axis, the solar cycle - yet a number of scientific studies indicate that most global warming in recent decades is due to the great concentration of greenhouse gases - carbon dioxide, methane, nitrogen oxides and others - released mainly as a result of human activity.
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"solar cycle." Definitions.net. STANDS4 LLC, 2018. Web. 20 Jul 2018. <https://www.definitions.net/definition/solar cycle>.