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The Solar Cycle [PDF]

open access: yesLiving Reviews in Solar Physics, 2015
The solar cycle is reviewed. The 11-year cycle of solar activity is characterized by the rise and fall in the numbers and surface area of sunspots. A number of other solar activity indicators also vary in association with the sunspots including; the 10.7
David H. Hathaway
doaj   +7 more sources

Solar cycle-related variation in solar differential rotation and meridional flow in solar cycle 24 [PDF]

open access: yesEarth, Planets and Space, 2020
We studied temporal variation of the differential rotation and poleward meridional circulation during solar cycle 24 using the magnetic element feature tracking technique.
Shinsuke Imada   +3 more
doaj   +2 more sources

A solar energy desalination analysis tool, sedat, with data and models for selecting technologies and regions

open access: yesScientific Data, 2022
There is interest for desalination technologies powered by solar energy as arid areas are typically bestowed with good solar potential. In response to a US DOE call for solar desalination analysis tools, we developed an open-source solar energy ...
Vasilis Fthenakis   +8 more
doaj   +1 more source

A brief review on the presentation of cycle 24, the first integrated solar cycle in the new millennium [PDF]

open access: yesAnnales Geophysicae, 2011
The status of the extended solar activity minimum, since the second half of 2007, has been briefly instructed to the solar-terrestrial community. Cycle 24 has the most spotless days since cycle 16, and probably even since the modern cycles, latitudes ...
K. J. Li   +5 more
doaj   +1 more source

Frequency of Solar Spotless Days and Flare Index as Indices of Solar Cycle Activity [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2014
There was a research on the prolongation of solar cycle 23 by the solar cyclic variation of solar, interplanetary geomagnetic parameters by Oh & Kim (2013).
Suyeon Oh
doaj   +1 more source

Prediction of solar activity on the basis of spectral characteristics of sunspot number [PDF]

open access: yesAnnales Geophysicae, 2004
Prediction of solar activity strength for solar cycles 23 and 24 is performed on the basis of extrapolation of sunspot number spectral components. Sunspot number data during 1933-1996 periods (solar cycles 17-22) are searched for periodicities by ...
E. Echer   +4 more
doaj   +1 more source

Charting the solar cycle

open access: yesFrontiers in Astronomy and Space Sciences, 2023
Sunspot records reveal that whilst the Sun has an approximately 11 year cycle of activity, no two cycles are of the same duration. Since this activity is a direct driver of space weather at Earth, this presents an operational challenge to quantifying ...
S. C. Chapman, S. C. Chapman
doaj   +1 more source

Prediction of even and odd sunspot cycles

open access: yesJournal of Space Weather and Space Climate, 2023
Here we study the prediction of even and odd numbered sunspot cycles separately, thereby taking into account the Hale cyclicity of solar magnetism. We first show that the temporal evolution and shape of all sunspot cycles are extremely well-described by ...
Asikainen Timo, Mantere Jani
doaj   +1 more source

Solar Cycle 25 Prediction Using N-BEATS

open access: yesThe Astrophysical Journal, 2023
Solar activities lead to Sun variation with an 11 yr periodicity. The periodic variation affects space weather and heliophysics research. So it is important to accurately predict solar cycle variations. In this paper, we predicted the ongoing Solar Cycle
Xu Su   +4 more
doaj   +1 more source

Seasonal, Diurnal, and Solar-Cycle Variations of Electron Density at Two West Africa Equatorial Ionization Anomaly Stations

open access: yesInternational Journal of Geophysics, 2012
We analyse the variability of foF2 at two West Africa equatorial ionization anomaly stations (Ouagadougou and Dakar) during three solar cycles (from cycle 20 to cycle 22), that is, from 1966 to 1998 for Ouagadougou and from 1971 to 1997 for Dakar.
Frédéric Ouattara   +2 more
doaj   +1 more source

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