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SUMMARY:The relation of the Sun’s global magnetic field with the solar w
 ind parameters on solar cycle time-scales
DTSTART;VALUE=DATE-TIME:20230511T081000Z
DTEND;VALUE=DATE-TIME:20230511T082500Z
DTSTAMP;VALUE=DATE-TIME:20240704T115652Z
UID:indico-contribution-339@meetings.aip.de
DESCRIPTION:Speakers: Raffaele Reda (University of Rome Tor Vergata)\nVari
 ations of the solar magnetic field are the main sources of several manifes
 tations of the solar activity (e.g. flares\, CMEs\, solar wind). A way to 
 quantify such variations is by means of a physical index\, the Ca II K ind
 ex\, which has been proven to be a great proxy for the line-of-sight unsig
 ned magnetic flux density along all phases of the cycle\, and not only whe
 n sunspots are present.\nIn this respect\, an assessment of the long-term 
 behaviour of the solar wind is of paramount importance to understand the n
 ature of its relationship with the global magnetic field of the Sun and wi
 th its cycle-to-cycle variations. Here\, we study the variations of physic
 al proxies of the solar activity (i.e. Ca II K index\, Mg II index)\, on s
 olar cycle time-scales\, and how they are related to variations of solar w
 ind parameters. The available time series allow to evaluate this relation 
 over the last five solar cycles (from 1965 to now).\nBy adopting a climato
 logical approach\, the results show that there is a delayed response of th
 e solar wind with respect to the solar activity\, but such response is not
  the same for the different solar cycles. The analysis offers the possibil
 ity to deepen the understanding of the processes that link the global dyna
 mo to solar variability and to the properties of the solar wind near the E
 arth.\n\nhttps://meetings.aip.de/event/24/contributions/339/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/339/
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