<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"><div class=WordSection1><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Dear colleagues,<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>We invite researchers and students to submit abstracts to a session on atmosphere-ionosphere coupling at vEGU 2021. vEGU21 will be a fully virtual meeting and will be held on April 19-30, 2021. Please find details at<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0070C0'>https://www.egu21.eu<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>and<o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0070C0'>https://meetingorganizer.copernicus.org/EGU21/session/40163</span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p></o:p></span></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>The abstract submission<span style='color:#1F497D'> </span>deadline is<span class=apple-converted-space> </span><b>13 January 2021, 13:00 CET.<span class=apple-converted-space> <o:p></o:p></span></b></span></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Looking forward to your contribution.</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Kind regards,</span><o:p></o:p></p><p class=MsoNormal style='margin-bottom:8.0pt;line-height:11.55pt'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Maosheng He, Yosuke Yamazaki, and<span class=apple-converted-space> </span>Larisa Goncharenko</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt'> </span><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>###</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>ST3.2</span><o:p></o:p></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Vertical coupling in the Atmosphere-Ionosphere system</span></b><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Convener: Maosheng He <span class=d-none>| </span>Co-conveners: Larisa Goncharenko, Yosuke Yamazaki</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><a href="https://meetingorganizer.copernicus.org/EGU21/abstractsubmission/40163"><span style='color:#954F72'>Abstract submission</span></a></span><o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin:1rem;box-sizing: border-box;border-top-left-radius: 0px;border-top-right-radius: 0px;border-bottom-right-radius: 0px;border-bottom-left-radius: 0px;color:var(--text-color-primary, rgba(50, 50, 50, 0.9))'>Earth’s atmosphere-ionosphere system is a stratified and vertically structured mix of gases that comprise different layers, i.e., the troposphere, stratosphere, mesosphere, and thermosphere, and its ionized part, the ionosphere. These layers are characterized by different combinations of dynamics, e.g., fluid-dynamic, chemical, and electrodynamical processes. The processes are coupled through various mechanisms, e.g., atmospheric circulations, disturbances, and various waves. The current session emphasizes the recent investigations of processes driving or reflecting vertical coupling within the atmosphere-ionosphere system in a broad range of spatial and temporal scales, such as atmospheric and ionospheric response to various waves (planetary waves, tides, gravity waves, etc.), transient phenomena (sudden stratospheric warming, seasonal transition), recurring patterns like QBO and ENSO, long-term trends in the middle and upper atmosphere and their drivers, and the relative importance of atmospheric and solar/magnetospheric forcing in the upper and middle atmosphere. This session invites contributions that discuss relevant methodologies, theory, modeling, experiment, and observations of different aspects of atmosphere-ionosphere coupling.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>