Correlation of solar activity proxy with solar wind dynamic pressure in the last five solar cycles

Reda, R. and Giovannelli, L. and Alberti, T. and Berrilli, F. and Giobbi, P. and Penza, V. (2021) Correlation of solar activity proxy with solar wind dynamic pressure in the last five solar cycles. Il nuovo cimento C, 44 (4-5). pp. 1-4. ISSN 1826-9885

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Abstract

Solar variability related to the magnetic activity can be quantified using synthetic indices (e.g., sunspots number) or physical ones (e.g., chromospheric proxies). To connect solar surface variability and its features in the near-Earth, we use Ca II K index and solar wind OMNI data in the time interval between 1965 and 2019, which almost entirely covers the last 5 solar cycles. Using long-term averaged data, anti-correlation between Ca II K index and solar wind dynamic pressure at 1 AU has been found during solar cycles 20 and 21, while this relation seems to change over the last 3 solar cycles.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	20 Sep 2021 09:41
Last Modified:	20 Sep 2021 09:41
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21335

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