Join The Team

Team title: Long-term solar variability

Team ID: S1-01

Team Lead:

Ilya Usoskin (University of Oulu, Finland),


Ilya Usoskin (University of Oulu, Finland),

Hisashi Hayakawa (STFC Rutherford Appleton Laboratory, UK),    

Mathew Owens ( University of Reading, UK),



The team holds a top-level expertise in long-term solar activity reconstruction based on sunspot observations; cosmogenic proxy data; extreme solar events; cosmic-ray modulation; cosmic-ray effects in the atmosphere; long-term solar variability.


Reliable estimates of long-term solar variability, based on proxy data, including uncertainty assessments.

Action topics:

  • Extreme space weather events and their impacts,
  • Solar irradiance, open flux and solar wind reconstruction,
  • Solar activity indices for constraining long-term variability

Clusters with overlapping topics:

S2, H1

Link to team external website: