Results 11 to 20 of about 12,501,323 (353)
A history of solar activity over millennia
Living Reviews in Solar Physics, 2017 Presented here is a review of present knowledge of the long-term behavior of solar activity on a multi-millennial timescale, as reconstructed using the indirect proxy method.
I G Usoskin
exaly +2 more sources
Heartbeat of the Sun from Principal Component Analysis and prediction of solar activity on a millenium timescale [PDF]
Scientific Reports, 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
V. Zharkova +3 more
semanticscholar +2 more sources
Solar Physics, 2016 Recent revisions in the sunspot records illustrate the challenges related to obtaining a 400-year-long observational record of past solar-activity changes.
Raimund Muscheler +2 more
exaly +2 more sources
Evidence for distinct modes of solar activity [PDF]
, 2014 Aims. The Sun shows strong variability in its magnetic activity, from Grand minima to Grand maxima, but the nature of the variability is not fully understood, mostly because of the insufficient length of the directly observed solar activity records and ...
I. Usoskin +9 more
semanticscholar +2 more sources
Imaging spectroscopy reveals spike-like repeating radio burst pairs in the solar corona [PDF]
Nature CommunicationsSolar radio bursts exhibit complex fine structures that reveal intricate coronal plasma dynamics. Here, we report detection of spike-like repeating burst pairs, characterized by two short-lived (0.1-2 s), narrowband components separated by about 4 s at ...
Suli Ma +4 more
doaj +2 more sources
Models for the long-term variations of solar activity [PDF]
Living Reviews in Solar Physics, 2023 One obvious feature of the solar cycle is its variation from one cycle to another. In this article, we review the dynamo models for the long-term variations of the solar cycle.
B. B. Karak
semanticscholar +1 more source
Long-term changes in solar activity and irradiance [PDF]
Journal of Atmospheric and Solar-Terrestrial Physics, 2023 The Sun is the main energy source to Earth, and understanding its variability is of direct relevance to climate studies. Measurements of total solar irradiance exist since 1978, but this is too short compared to climate-relevant time scales.
T. Chatzistergos, N. Krivova, K. L. Yeo
semanticscholar +1 more source
Mingantu Spectral Radioheliograph for Solar and Space Weather Studies
Frontiers in Astronomy and Space Sciences, 2021 The Chinese Spectral Radioheliograph (CSRH) covering 400 MHz-15 GHz frequency range was constructed during 2009–2016 in Mingantu Observing Station, National Astronomical Observatories, Chinese Academy of Sciences at Zhengxiangbaiqi, Inner Mongolia of ...
Yihua Yan +12 more
doaj +1 more source
Earth, Planets and Space, 2021 In order to reveal solar activity dependence of the medium-scale traveling ionospheric disturbances (MSTIDs) at midlatitudes, total electron content (TEC) data obtained from a Global Positioning System (GPS) receiver network in Japan during 22 years from
Y. Otsuka +3 more
semanticscholar +1 more source
Earth, Planets and Space, 2023 In this study, the neutral wind observations from the Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) instrument onboard Ionospheric CONnections (ICON) are used to investigate the longitudinal structure of zonal wind ...
Dan Li +6 more
doaj +1 more source