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<p class="MsoNormal">Dear Christian et al.,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I was surprised to see your announcement for a focus group related to the ring current origin and dynamics that does not mention the role that the ionosphere (polar wind) plays in populating the ring current through the energization of
outflowing polar wind ions from the lobe in the mid-plane region of the magnetotail. Studies many years ago (Huddleston et al, 2005, dtc) have continued to the present time (Glocer et al, 2020) and show that the ionospheric source (polar wind and polar cusp)
is the dominant supplier of plasma to the ring current.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Rick Chappell<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Cedar_email <cedar_email-bounces@mailman.ucar.edu> on behalf of Ferradas Alva, Cristian (GSFC-6730)[CATHOLIC UNIV OF AMERICA] via Cedar_email <cedar_email@mailman.ucar.edu><br>
<b>Date: </b>Tuesday, July 6, 2021 at 2:20 PM<br>
<b>To: </b>cedar_email@mailman.ucar.edu <cedar_email@mailman.ucar.edu><br>
<b>Subject: </b>CEDAR email: Invitation to 2021 VGEM SCIMM Focus Group Activities<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Dear Colleagues,</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">The GEM Focus Group (FG) ‘<span style="border:none windowtext 1.0pt;padding:0in">Self-Consistent Inner Magnetosphere Modeling</span>’ will have two sessions at this year's
Virtual GEM Workshop on Tuesday July 27th, 2021. The <b>two sessions</b> will focus on:</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">- <u>Session 1</u>: Ring Current Dynamics (Tuesday July 27th, 1:00 pm - 2:30 pm EDT)</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in">This session will focus on the transport, energization, loss, and composition of the ring current ions and
electrons, and the associated variations in electric and magnetic fields. We welcome presentations of research related to the ring current dynamics through numerical modeling and satellite observations.</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">-<span style="border:none windowtext 1.0pt;padding:0in"> </span></span><u><span style="font-size:12.0pt;font-family:"inherit",serif;color:black">Session 2</span></u><span style="font-size:12.0pt;color:black">:
Wave-Particle Interactions <span style="border:none windowtext 1.0pt;padding:0in">(Tuesday July 27th, 3:00 pm - 4:30 pm EDT)</span></span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black;border:none windowtext 1.0pt;padding:0in">This session will focus on wave-particle interactions in the ring current, which drive the excitation of plasma waves, and the
scattering or heating of thermal, suprathermal and energetic ions and electrons. We solicit talks of both modeling and observational works.</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Also, this year we are excited to launch our <b>FG challenges</b>. Several workshops earlier this year, such as Helio2050 and the Van Allen Probes mission legacy workshop,
have set the scene by identifying key aspects of inner magnetosphere research that we must address as a community to move our field forward. Key topics include: understanding the relative contribution of the solar wind, cusp, and nightside auroral ion sources
to the ring current, incorporating micro-scale wave-particle interactions in global ring current models, realistically characterizing bursty bulk flows (BBFs) during storm times to assess the rapid ring current development on short time scales, and understanding
how magnetosphere-ionosphere-thermosphere coupling affects the inner magnetospheric electric field through changes in ionospheric conductivity and neutral winds.</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">We envision the challenges to take the form of storm case studies focusing on one or several of the topics mentioned above. Some potential storm events are: the May 27-30
2017, September 6-12 2017, and August 25-30 2018 storms.</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">We invite the community to participate in our FG activities for this year’s VGEM in the following ways:</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">1. Presenting research results relevant to the topics of one or both sessions. For both sessions, we solicit 8-10 min talks.</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">2. Providing input or suggestions on the research focus and/or the selection of events for the FG challenges. We will announce the FG challenges after this year’s VGEM.</span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black"> </span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:12.0pt;color:black">Please contact Cristian Ferradas (<a href="mailto:cristian.ferradasalva@nasa.gov" target="_blank"><span style="color:#1155CC">cristian.ferradasalva@nasa.gov</span></a>)
and Chao Yue (<a href="mailto:yuechao@pku.edu.cn" target="_blank"><span style="color:#1155CC">yuechao@pku.edu.cn</span></a>) to submit contributed talks and provide input regarding the FG challenges. <span style="border:none windowtext 1.0pt;padding:0in">We
will list the contributed talks and details of the sessions on the FG website at <a href="https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgem.epss.ucla.edu%2Fmediawiki%2Findex.php%2FFG%3A_Self-Consistent_Inner_Magnetospheric_Modeling&data=04%7C01%7Crick.chappell%40Vanderbilt.Edu%7Cb3ec24b0998740d6592108d940b3213e%7Cba5a7f39e3be4ab3b45067fa80faecad%7C0%7C1%7C637611960369349800%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=HM7jWiw2qAC7tfwUBxHYOeGQdu33MSsD28jDwrgSSM4%3D&reserved=0" target="_blank" title="Original URL: https://gem.epss.ucla.edu/mediawiki/index.php/FG:_Self-Consistent_Inner_Magnetospheric_Modeling. Click or tap if you trust this link.">https://gem.epss.ucla.edu/mediawiki/index.php/FG:_Self-Consistent_Inner_Magnetospheric_Modeling</a>. </span></span><span style="font-size:12.0pt;color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">Kind regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black">The SCIMM FG conveners (Chao Yue, Qianli Ma, Jacob Bortnik, and Cristian Ferradas)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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