Linking long-term switchback variability at 1 au to solar-surface mechanisms: A 27-year statistical study

March 19, 2026

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This study aims to connect long-term switchback variability with solar-surface mechanisms over 27 years.
Utilized 27 years of in situ measurements from ACE, Wind, and STEREO-A/B at 1 au.
Complemented measurements with synoptic remote-sensing data from SDO.
Examined correlations between switchback occurrence and Alfvénicity on solar-cycle timescales.
Strong correlation between switchback occurrence rate and Alfvénicity (cc=0.70).
No solar-maximum preference for switchbacks independent of sunspot number (cc=0.13).
Coronal jets influence switchbacks indirectly through solar wind speed modulation.

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Statistical study reveals switchback occurrence relates to solar mechanisms, suggesting new insights into solar wind dynamics.

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Dai et al. (2026) studied this question.

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