<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Dear Colleagues,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The 2023 EGU General Assembly will be held on 23–28 April 2023. We invite you to consider submitting your abstract to the ST3.4 session, "Couplings in the atmosphere-Ionosphere system". The session is hybrid and welcomes contributions from both in-person and remote participants.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>Session Description:<o:p></o:p></p><p class=MsoNormal>The ionosphere-thermosphere system is the portion of geospace where the neutral atmosphere interacts with plasma. These interactions are driven by numerous periodic and transient processes across broad temporal and spatial scales. Our session aims to communicate the recent advances in atmosphere-ionosphere couplings. We solicit observational and modeling studies on relevant couplings through, e.g., long-term trends, regular atmospheric circulation and oscillations (e.g., the El Ni?o–southern oscillation and the quasi-biennial oscillation), geological and meteorological transient atmospheric disturbances (e.g., sudden stratospheric warmings, volcanic eruptions, and earthquakes), waves and wave-like perturbations (e.g., planetary waves, tides, gravity waves, and traveling ionospheric disturbances), and turbulent and other nonlinear processes.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> Abstract submission:<o:p></o:p></p><p class=MsoNormal> <a href="https://meetingorganizer.copernicus.org/EGU23/session/46347">https://meetingorganizer.copernicus.org/EGU23/session/46347</a><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> Note that the abstract submission deadline is <b>Tuesday, 10 January 2023 at 13:00 CET.</b><o:p></o:p></p><p class=MsoNormal> We look forward to your contribution.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal> Sincerely,<o:p></o:p></p><p class=MsoNormal> Conveners: Maosheng He, Yosuke Yamazaki, Larisa Goncharenko, Chao Xiong, Gunter Stober<o:p></o:p></p></div></body></html>