Evidence of plasma lunar tide in the Earth-Moon system

Evidence of plasma lunar tide in the Earth-Moon system | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Letter Evidence of plasma lunar tide in the Earth-Moon system Chao Xiao, Fei He, Quanqi Shi, Wenlong Liu, Anmin Tian, Ruilong Guo, and 15 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-1474794/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 26 Jan, 2023 Read the published version in Nature Physics → Version 1 posted You are reading this latest preprint version Abstract Tides are universal, significantly affecting spatially distributed systems, from planetary to galactic scales. In the Earth-Moon system, lunar tides have been studied in the solid Earth, liquid ocean, and neutral gas-dominated atmosphere (including the ionosphere). However, whether a lunar tide effect exists over wider plasma dominated regions has remained unexplored until now. Here we show direct evidence of a lunar tide signal in the plasmasphere, a typical cold “plasma ocean” in the Earth-Moon space, by analyzing variations in its boundary location over the past four decades from multi-satellite observations. This signal possesses distinct diurnal (and monthly) periodicities, surprisingly different from the semidiurnal (and semimonthly) variations dominant in the atmosphere, ocean, and solid Earth, with tidal surface perturbations of up to ~800 km via disturbing the electric field. These results demonstrate the importance of lunar tidal effects in plasma dominated regions of Earth-moon space, opening new perspectives for understanding Moon-atmosphere-magnetosphere coupling process through gravity and electromagnetic forces, and has implications for tidal interactions in other two-body celestial systems. Full Text Additional Declarations There is NO Competing Interest. Supplementary Files MovieS1Lunartide.gif Movie_S1_Lunar_Tide SupplementaryInformation.pdf Cite Share Download PDF Status: Published Journal Publication published 26 Jan, 2023 Read the published version in Nature Physics → Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. 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