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The Solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a periodic 11-year change in the Sun's activity measured in terms of variations in the number of observed sunspots on the Sun's surface. Over the period of a solar cycle, levels of solar radiation and ejection of solar material, the number and size of…
History, Observational history & Phenomena
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solar cycle magnetic sunspots activity field cycles years maximum sunspot sun flux also minimum variations climate earth's surface cosmic irradiance
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Solar cycle | is a | spatiotemporal magnetic process unfolding over the Sun as a whole | 0.90 | text |
| aurora but was not clearly identified until 1843 | instance of | completing what is known as a Hale cycle.This cycle has been observed for centuries by changes in the Sun's appearance and by terrestrial phenomena | 0.80 | text |
| ice sheets | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| tree rings | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| by using historic observations of geomagnetic storm activity | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| which bridge the time gap between the end of the usable cosmogenic isotope data | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| the start of modern satellite data.These variations have been successfully reproduced using models that employ magnetic flux continuity equations | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| observed sunspot numbers to quantify the emergence of magnetic flux from the top of the solar atmosphere | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| into the heliosphere | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| showing that sunspot observations | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| geomagnetic activity | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
| cosmogenic isotopes offer a convergent understanding of solar activity variations.Suess cycleThe Suess cycle | instance of | associated centennial variations in magnetic fields in the corona and heliosphere have been detected using carbon-14 and beryllium-10 cosmogenic isotopes stored in terrestrial r… | 0.80 | text |
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