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<span style="font-family:"Calibri",sans-serif;color:windowtext">Dear Colleagues,<br>
<br>
Please consider submitting an abstract to the “ The Upper Mesosphere and Lower Thermosphere: Observations, Modeling and Implications Future Directions” session (SA020) at the 2018 Fall AGU meeting.
<o:p></o:p></span></p>
<p style="margin-bottom:12.0pt"><span style="font-family:"Calibri",sans-serif;color:windowtext">Abstracts are due 1 August 2018, 23:59.</span><span style="color:windowtext"><br>
</span><span style="font-family:"Calibri",sans-serif;color:windowtext"><br>
Session Description:<o:p></o:p></span></p>
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<span style="font-family:"Calibri",sans-serif;color:windowtext">The upper mesosphere and lower thermosphere (MLT) is an important transition zone through which atmospheric disturbances below connect with the thermosphere above. The MLT harbors key information
on dynamics, chemistry, long-term change, vertical coupling, and the role of solar forcing. Space and ground-based missions provide significant advances in observations of temperature, gas concentrations and radiances, ice layers, particulates which serve
as ice nucleation sites, and lower atmosphere dynamics sources. Sophisticated multidimensional models now incorporate new dynamics mechanisms, microphysics calculations, and crucial tools to understand coupling between mesopause ice layers and the local environment.
This session discusses advances in both observations and modeling and to discuss the implications of those new results for future directions in MLT science. We solicit papers discussing the composition, structure and variability of the MLT environment, ice
nucleation sources and processes, vertical and meridional coupling, model advances and the extent, causes and implications of long-term trends.<o:p></o:p></span></p>
<p style="mso-margin-top-alt:5.0pt;margin-right:1.0in;margin-bottom:12.0pt;margin-left:0in">
<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">We gratefully acknowledge presentations by two invited speakers, Drs. Franz-Josef Lübken and Lynn Harvey</span><span style="font-family:"Calibri",sans-serif;color:windowtext"><br>
<br>
Link to abstract submission:<br>
</span><span style="font-family:"Calibri",sans-serif;color:#00B0F0"><a href="https://fallmeeting.agu.org/2018/abstract-submissions/"><span style="color:#00B0F0">https://fallmeeting.agu.org/2018/abstract-submissions/</span></a></span><span style="font-family:"Calibri",sans-serif;color:windowtext"><br>
<br>
Session ID: 52440<br>
Session Title: SA020: The Upper Mesosphere and Lower Thermosphere: Observations, Modeling and Implications Future Directions<br>
Section/Focus Group: SPA-Aeronomy<br>
View Session Details: <a href="https://agu.confex.com/agu/fm18/prelim.cgi/Session/52440">
https://agu.confex.com/agu/fm18/prelim.cgi/Session/52440</a><o:p></o:p></span></p>
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<span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">Thank you and best regards,<o:p></o:p></span></p>
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<span style="font-family:"Calibri",sans-serif;color:windowtext">Your session conveners,<br>
Scott M. Bailey, James M. Russell, III<br>
<br>
</span><span style="font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
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