Results 21 to 30 of about 2,970,923 (298)
A brief review on the presentation of cycle 24, the first integrated solar cycle in the new millennium [PDF]
Annales 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
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Frequency of Solar Spotless Days and Flare Index as Indices of Solar Cycle Activity [PDF]
Journal 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
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Prediction of solar activity on the basis of spectral characteristics of sunspot number [PDF]
Annales 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
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SOLAR CYCLE 25: ANOTHER MODERATE CYCLE? [PDF]
The Astrophysical Journal Letters, 2016 ABSTRACT Surface flux transport simulations for the descending phase of Cycle 24 using random sources (emerging bipolar magnetic regions) with empirically determined scatter of their properties provide a prediction of the axial dipole moment during the upcoming activity minimum together with a realistic uncertainty range. The expectation
R. H. Cameron, J. Jiang, M. Schüssler
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Frontiers 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
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Development of a solar-energy activated organic Rankine-cycle pilot power plant [PDF]
, 1984 with the development of a low-grade energy engine in the School of Mechanical Engineering at Cranfield, there began a venture towards utilizing the Sun's power to operate the engine via a thermodynamic cycle, in an Egyptian desert area, i. e latitude
Bala, Eli Jidere
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Multi-Scale Modelling of a Solar Reactor for the High-Temperature Step of a Sulphur-Iodine-Based Water Splitting Cycle [PDF]
, 2011 The 3-step sulphur-iodine-based thermochemical cycle for splitting water is considered. The high temperature step of the closed-material cycle consists of evaporation, decomposition, and reduction of sulphuric acid to SO2 using concentrated solar process
Roeb, Martin +11 more
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Forecasting Solar Cycle 25 with Physical Model-Validated Recurrent Neural Networks
, 2023 The Sun's activity, which is associated with the solar magnetic cycle, creates a dynamic environment in space known as space weather. Severe space weather can disrupt space-based and Earth-based technologies.
Ghosh, A +13 more
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Solar rotation over solar cycle 21 [PDF]
International Astronomical Union Colloquium, 1991 Abstract Having measured the rotation rate of sunspots through solar cycle 21, from 1977 to 1983, we have found that the mean differential rotation averaged over this seven year record is similar to the grand average differential rotation determined by Howard et al. (1984) over the period 1921-1982.
Elisabeth Ribes +3 more
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Heartbeat of the sun from principal component analysis and prediction of solar activity on a millenium timescale [PDF]
, 2015 We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21-24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves travelling from
Shepherd, Simon J. +10 more
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