448 citations · 2.8k across the 32 of their papers we have counts for
21 papers · 1 filter
Solar cyclic activity over the last millennium reconstructed from annual 14C data
I. G. Usoskin, S. K. Solanki, N. Krivova +5
The 11-year solar cycle is the dominant pattern of solar activity reflecting the oscillatory dynamo mechanism in the Sun. Solar cycles were directly observed since 1700, while indi…
New reconstruction of event-integrated spectra (spectral fluences) for major solar energetic particle events
Sergey A. Koldobskiy, Osku Raukunen, Rami Vainio +2
Fluences of solar energetic particles (SEPs) are not easy to evaluate, especially for high-energy events (i.e. ground-level enhancements, GLEs). Earlier estimates of event-integrat…
Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated ADF Sunspot Group Series
Ilya Usoskin, Gennady Kovaltsov, Wilma Kiviaho
Empirical rules of solar cycle evolution form important observational constraints for the solar dynamo theory. This includes the Waldmeier rule relating the magnitude of a solar cy…
Revisited reference solar proton event of 23-Feb-1956: Assessment of the cosmogenic-isotope method sensitivity to extreme solar events
Ilya G. Usoskin, Sergey A. Koldobskiy, Gennady A. Kovaltsov +4
Our direct knowledge of solar eruptive events is limited to several decades and does not include extreme events, which can only be studied by the indirect proxy method over millenn…
Solar energetic particles and galactic cosmic rays over millions of years as inferred from data on cosmogenic Al in lunar samples
S. Poluianov, G. A. Kovaltsov, I. G. Usoskin
Aims. Lunar soil and rocks are not protected by a magnetic field or an atmosphere and are continuously irradiated by energetic particles that can produce cosmogenic radioisotopes d…
Solar activity over nine millennia: A consistent multi-proxy reconstruction
Chi Ju Wu, I. G. Usoskin, N. Krivova +4
Solar activity in the past millennia can only be reconstructed from cosmogenic radionuclide records in terrestrial archives. However, because of the diversity of the proxy archives…