{"paper":{"title":"Solar Wind Helium Abundance Heralds Solar Cycle Onset","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["physics.plasm-ph","physics.space-ph"],"primary_cat":"astro-ph.SR","authors_text":"B. L. Alterman, Justin C. Kasper, Robert J. Leamon, Scott W. McIntosh","submitted_at":"2020-06-08T15:15:43Z","abstract_excerpt":"We study the solar wind helium-to-hydrogen abundance's ($A_\\mathrm{He}$) relationship to solar cycle onset. Using OMNI/Lo data, we show that $A_\\mathrm{He}$ increases prior to sunspot number (SSN) minima. We also identify a rapid depletion and recovery in $A_\\mathrm{He}$ that occurs directly prior to cycle onset. This $A_\\mathrm{He}$ Shutoff happens at approximately the same time across solar wind speeds ($v_\\mathrm{sw}$), implying that it is formed by a mechanism distinct from the one that drives $A_\\mathrm{He}$'s solar cycle scale variation and $v_\\mathrm{sw}$-dependent phase offset with res"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.04669","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2006.04669/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}