A review of the SCOSTEP's 5-year scientific program VarSITI—Variability of the Sun and Its Terrestrial Impact

K Shiokawa, K Georgieva - Progress in Earth and Planetary Science, 2021 - Springer
The Sun is a variable active-dynamo star, emitting radiation in all wavelengths and solar-
wind plasma to the interplanetary space. The Earth is immersed in this radiation and solar …

Periodicities in solar activity, solar radiation and their links with terrestrial environment

VV Zharkova, I Vasilieva, SJ Shepherd… - Natural Science, 2023 - go7publish.com
Solar magnetic activity is expressed via variations of sunspots and active regions varying on
different timescales. The most accepted is an 11-year period supposedly induced by the …

[HTML][HTML] RETRACTED ARTICLE: Oscillations of the baseline of solar magnetic field and solar irradiance on a millennial timescale

VV Zharkova, SJ Shepherd, SI Zharkov, E Popova - Scientific Reports, 2019 - nature.com
Recently discovered long-term oscillations of the solar background magnetic field
associated with double dynamo waves generated in inner and outer layers of the Sun …

Periodicities of solar activity and solar radiation derived from observations and their links with the terrestrial environment

VV Zharkova, I Vasilieva, S Shepherd… - arXiv preprint arXiv …, 2023 - arxiv.org
Solar magnetic activity is expressed via variations of sunspots and active regions varying on
different timescales. The most accepted is an 11-year period supposedly induced by the …

Multimode Representation of the Magnetic Field for the Analysis of the Nonlinear Behavior of Solar Activity as a Driver of Space Weather

E Popova, AI Popov, R Sagdeev - Mathematics, 2022 - mdpi.com
Estimating and predicting space weather is important to the space industry and space
missions. The driver of space weather, especially near the Earth, is solar activity, the study of …

Reply to comment on the paper “on a role of quadruple component of magnetic field in defining solar activity in grand cycles” by Usoskin (2017)

V Zharkova, E Popova, S Shepherd… - Journal of Atmospheric and …, 2018 - Elsevier
In this communication we provide our answers to the comments by Usoskin (2017) on our
recent paper (Popova et al, 2017a). We show that Principal Component Analysis (PCA) …

Eigenvectors of solar magnetic field in cycles 21–24 and their links to solar activity indices

VV Zharkova, SJ Shepherd - Monthly Notices of the Royal …, 2022 - academic.oup.com
Using full disc synoptic maps of solar background magnetic field captured from the Wilcox
Solar Observatory for 30 latitudinal bands for cycles 21–24, principal components (PCs) or …

The Spörer minimum was deep

MG Ogurtsov - Advances in Space Research, 2019 - Elsevier
Seventeen reconstructions of past solar activity, based on cosmogenic isotope and auroral
data, were analyzed for the time interval CE 1402–1850 covering three prolonged periods of …

Schwabe Solar Cycle in 1000–1700: Variations in Length and Amplitude

NG Ptitsyna, IM Demina - Geomagnetism and Aeronomy, 2024 - Springer
One of the most significant features of solar activity is its variability in a wide range of periods
with the dominance of the 11-year cycle or the Schwabe cycle. In this article, a wavelet …

Comment on the paper by Popova et al.“On a role of quadruple component of magnetic field in defining solar activity in grand cycles”

IG Usoskin - Journal of Atmospheric and Solar-Terrestrial Physics, 2018 - Elsevier
The paper by Popova et al. presents an oversimplified mathematical model of solar activity
with a claim of predicting/postdicting it for several millennia ahead/backwards. The work …