<div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Dear Colleagues,</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:14px"><font face="georgia, serif" color="#000000"><br></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">We would like to invite you to submit abstracts to the 2026 EGU General Assembly session - "<i>Dynamics, Chemistry, and Coupling in the Middle Atmosphere and MLT Regions.</i>" The EGU26 meeting will take place from May 03 to 08, 2026, in Vienna, Austria, and online. </font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:14px"><font face="georgia, serif" color="#000000"><br></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">          ****<b>Session Details</b>****</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Session Title: ST3.2/AS3/PS4 - Dynamics, Chemistry, and Coupling in the Middle Atmosphere and MLT Regions</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Section: Solar-Terrestrial Sciences</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Session Link: <i><a href="https://www.egu26.eu/session/57170" target="_blank">https://www.egu26.eu/session/57170</a></i><i></i></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Conveners: Sovit Khadka, Linda Megner, Kimberlee Dubé, Maosheng He, and Juan Antonio Añel</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Invited Speakers: Daniel March (University of Leeds) and Gunter Stober (University of Bern)</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:14px"><font face="georgia, serif" color="#000000"><br></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000"><b>Session Description:</b><b></b></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">The Earth's middle atmosphere, mesosphere, and lower thermosphere (MLT) region provide a great platform for studying ionospheric dynamics, disturbances, eddy mixing, atmospheric drag effects, and space debris tracking. The thermal structure of these regions is influenced by numerous energy sources such as solar radiation, chemical, and dynamical processes, as well as forces from both above (e.g., solar and magnetospheric inputs) and below (e.g., gravity waves and atmospheric tides). Solar atmospheric tides, related to global-scale variations of temperature, density, pressure, and wind waves, are responsible for coupling the lower and upper layers of the atmosphere and significantly impact their vertical profiles in the upper atmosphere. With evidence of climate change impacts on the middle and upper atmosphere, monitoring and understanding trends through observational data is critical. There has been a contraction of the stratosphere and a decrease in the density of the upper atmosphere, which could impact the accumulation of space debris. This session invites presentations on scientific work related to various experimental/observational techniques, numerical and empirical modeling, and theoretical analyses on the dynamics, chemistry, and coupling processes in the altitude range of ~ 20 km to 180 km of the middle atmosphere and MLT regions, including long-term climatic changes.</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:14px"><font face="georgia, serif" color="#000000"><br></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">We look forward to your contribution to our EGU26 session.</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Please note that the abstract submission deadline is <b>Thursday, 15 January 2026, at 13:00 CET</b>.</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:14px"><font face="georgia, serif" color="#000000"><br></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Thank you.</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal;min-height:14px"><font face="georgia, serif" color="#000000"><br></font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000">Sincerely,</font></p>
<p style="margin:0px;text-align:justify;line-height:normal;font-size-adjust:none;font-kerning:auto;font-variant-alternates:normal;font-variant-ligatures:normal;font-variant-numeric:normal;font-variant-east-asian:normal;font-feature-settings:normal"><font face="georgia, serif" color="#000000"><b>The Conveners Team:</b> Sovit Khadka, Linda Megner, Kimberlee Dubé, Maosheng He, and Juan Antonio Añel</font></p>
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