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<!--StartFragment--><p class="MsoNormal">We invite you to submit an abstract to the AGU 2016 Fall meeting Session: Neutral metallic atom layers in the
thermosphere 110–200 km, observations, origins and implications<o:p class=""></o:p></p><p class="MsoNormal"><b class="">Description</b>: <o:p class=""></o:p></p><p class="MsoNormal">Neutral metal atom layers have recently been observed by
several groups in the thermosphere as high as 170 km. Past satellite data have shown
metal ions above 200 km. These challenge our understanding of the thermosphere
and metal atom sources. No existing theory can explain the observations of
these high altitude metal layers. This session presents the following
questions:<o:p class=""></o:p></p><p class="MsoNormal" style="margin-left:.25in">What is the source of the metal
atoms and ions in the thermosphere above the “meteor zone”?<o:p class=""></o:p></p><p class="MsoNormal" style="margin-left:.25in">Are the atomic layers the result
of recombination, deposition, transport, or some combination of these?<o:p class=""></o:p></p><p class="MsoNormal" style="margin-left:.25in">Given that these layers are not
associated with any known “events”, either Space Weather or terrestrial, why
then are the layers so rare and sporadic?<o:p class=""></o:p></p><p class="MsoNormal" style="margin-left:.25in">What additional research
opportunities do they enable?<o:p class=""></o:p></p><p class="MsoNormal">We invite presentations that can contribute to our understanding
of these unusual layers, including observations, models, and discussion of the
implications for future thermosphere research.<o:p class=""></o:p></p><p class="MsoNormal"><b class="">Section/Focus Group</b>:
SA<o:p class=""></o:p></p><p class="MsoNormal"><b class="">Conveners</b>: <o:p class=""></o:p></p><p class="MsoNormal">Jonathan S. Friedman<br class="">
SRI International Arecibo Observatory<br class="">
<a href="mailto:jonathan@naic.edu" class="">jonathan@naic.edu</a><o:p class=""></o:p></p><p class="MsoNormal">Shikha Raizada<br class="">
SRI International Arecibo Observatory<br class="">
<a href="mailto:shikha@naic.edu" class="">shikha@naic.edu</a><o:p class=""></o:p></p><p class="MsoNormal">Jens Lautenbach<br class="">
SRI International Arecibo Observatory<br class="">
<a href="mailto:jlautenbach@naic.edu" class="">jlautenbach@naic.edu</a></p>
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