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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">Dear Colleagues,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">Please consider submitting an abstract to the
</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;border:none windowtext 1.0pt;padding:0in;background:white">SA006</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;background:white"> - Composition
and Temperature Variations in the Mesosphere, Thermosphere and Ionosphere session at the 2019 Fall AGU Meeting to be held in San Francisco, CA, 9-13 December 2019. Reminder: the abstract submission deadline is Wednesday 31 July 2019, at 11:59 PM EDT.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><u><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;background:white">Session Description<o:p></o:p></span></u></b></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;background:white">The composition and temperature variations of Earth’s mesosphere, thermosphere, and ionosphere are determined by the complex interplay of chemical,
dynamical, and thermodynamic processes driven by forcing from both above and below. More importantly, the forcing of these regions and the different processes that govern their composition and temperature vary over a wide range of timescales (e.g., seasonal
to inter-annual), hindering accurate representations of thermospheric and ionospheric composition and temperature critical to satellite operations and radio communications. Current space missions, field campaigns, and novel data assimilation, theoretical and
physics-based modeling advances have led to a new understanding of the how and why the dominant drivers of composition and temperature in the mesosphere, thermosphere, and ionosphere change over such timescales. This session therefore seeks to highlight various
topics surrounding middle and upper atmospheric composition and temperature variability and the prominent mechanisms that drive their seasonal and inter-annual variability using observations and models.</span><span style="font-size:14.0pt">
</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif">(see </span>
<span style="font-size:14.0pt;font-family:"Arial",sans-serif"><a href="https://agu.confex.com/agu/fm19/prelim.cgi/Session/76082">https://agu.confex.com/agu/fm19/prelim.cgi/Session/76082</a>).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;background:white">Abstracts
</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#222222;background:white">can be submitted at </span><span style="font-size:14.0pt;font-family:"Arial",sans-serif"><a href="https://www2.agu.org/Fall-Meeting/Pages/Submit-an-abstract" target="_blank"><span style="color:#1155CC;background:white">https://www2.agu.org/Fall-Meeting/Pages/Submit-an-abstract</span></a>.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#262626;background:white"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">We look forward to seeing all the great work being done in our field,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">Mack, Jia, Marty, and Alan<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#3C6BA1">McArthur Jones Jr.</span></b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#1E3A69">Research Physicist, Space Science Division</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#1E3A69">Code 7632</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#1E3A69">Naval Research Laboratory</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#3C6BA1">T</span></b><b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"> </span></b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#1E3A69">(202)
767-6317</span><b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"> </span></b><b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#3C6BA1">C </span></b><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#1E3A69">(717)
580-9613</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#3C6BA1">www.nrl.navy.mil</span><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" align="center" style="text-align:center"><span style="font-size:14.0pt;font-family:"Arial",sans-serif;color:#3C6BA1"><img border="0" width="1777" height="1" style="width:18.5104in;height:.0104in" id="Rectangle_x0020_1" src="cid:image001.png@01D52CBA.63C32410"><o:p></o:p></span></p>
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