<div dir="ltr"><div><span id="gmail-docs-internal-guid-096692d8-7fff-c1f5-48d2-2386d793b3e4"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Dear colleagues,</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size:11pt;font-family:Arial,sans-serif;vertical-align:baseline">We are pleased to announce the next ISWI Webinar of 2026 by</span><span style="background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size:11pt;font-family:Arial,sans-serif;font-weight:700;vertical-align:baseline"> Dr Artem Smirnov</span><span style="background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size:11pt;font-family:Arial,sans-serif;vertical-align:baseline"> scheduled for </span><span style="background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size:11pt;font-family:Arial,sans-serif;font-weight:700;vertical-align:baseline">March 25th, 2026 at 3 PM</span><span style="background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-size:11pt;font-family:Arial,sans-serif;vertical-align:baseline"> Central European Time (9 AM EDT; 7:30 PM IST). </span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">To attend the next Webinar, please register </span><a href="https://iswi-secretariat.org/home-page/meetings/iswi-webinars/iswi-webinar-registration/" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;text-decoration-line:underline;vertical-align:baseline">here</span></a><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">. The MS Teams link will be sent to registered participants 2 days before the event.</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">To watch past Webinars, please check the following link: </span><a href="https://cdaw.gsfc.nasa.gov/webinars/ISWI/" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;text-decoration-line:underline;vertical-align:baseline"> https://cdaw.gsfc.nasa.gov/webinars/ISWI/</span></a></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">With kind regards,</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">Graciela Molina</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">on behalf of the ISWI Seminar Committee</span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><a href="https://iswi-secretariat.org/home-page/organization/iswi-webinar-committee/" style="text-decoration-line:none"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;text-decoration-line:underline;vertical-align:baseline">https://iswi-secretariat.org/home-page/organization/iswi-webinar-committee/</span></a></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"> </span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline"> </span></p><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-size:11pt;font-family:Arial,sans-serif;background-color:transparent;font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;vertical-align:baseline">***********************************************</span></p><u>Title</u>: <b>New dynamics of ionospheric electron temperature overshoot uncovered by neural networks</b><br><u>Speaker</u>: <b>Dr. Artem Smirnov</b><br>Helmholtz Centre Potsdam -<br>GFZ German Research Centre for Geosciences<br><br><u>Abstract:</u> An intense surge in equatorial electron temperature (Te) at sunrise, known as the morning Te overshoot, has been one of the most widely studied ionospheric features since its discovery in the early Space Age. Despite extensive research, its behavior during geomagnetic storms remains poorly understood. Using global electron temperature observations by the CHAllenging Minisatellite Payload (CHAMP) mission in 2002-2010, we develop a global neural network Te model that shows excellent performance on independent data, including those from the incoherent scatter radars (ISRs). The model revealed an unexpected two-phase stormtime response of the morning Te overshoot. During the storm’s main phase, electron temperatures in the overshoot region exhibit a pronounced enhancement, followed by a dramatic depletion exceeding 1000 K and disappearance of the overshoot during the recovery phase. This evolution corresponds to the initial influence of a westward prompt penetration electric field (PPEF), which reduces electron densities, allowing for more efficient energy exchange between newly ionized sunrise particles and the lower-energy (depleted) ambient plasma. Later in the storm, the eastward disturbance dynamo field flips the ExB drift from downward to upward and lifts more electrons into the F-region. The resulting increase in electron density enhances cooling rates, leading to the overshoot's disappearance in the recovery phase. Our findings shed new light on the dynamics of the morning electron temperature overshoot and highlight the capability of new-generation NN models of the near-Earth space environment to uncover previously unrecognized physical patterns even for the most commonly studied phenomena.<p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br></p><img src="cid:ii_mm9z72gn0" alt="ISWI Seminar Series.png" width="528" height="528"><p dir="ltr" style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br></p></span><br class="gmail-Apple-interchange-newline"></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>-------------------------------------------</div><div><div><font face="times new roman, serif"><b>Dra. María Graciela Molina</b><br>Prof. Asociada FACET-UNT / Associate Professor FACET -UNT </font></div><div><span style="font-family:"times new roman",serif">Inv. Adjunta CONICET / Researcher CONICET</span></div><div><span style="font-family:"times new roman",serif">Investigadora Asociada INGV/ Associated researcher INGV</span></div><div><span style="font-family:"times new roman",serif">President of ALAGE (</span><font face="times new roman, serif"><a href="https://alage.org/" target="_blank">https://alage.org/</a></font><span style="font-family:"times new roman",serif">)</span></div><div><span style="color:rgb(34,34,34);font-family:"times new roman",serif">Co-leader FA3 - COURSE/SCOSTEP (</span><font face="times new roman, serif" style="color:rgb(34,34,34)"><a href="https://scostep.org/scostep-course/" style="color:rgb(17,85,204)" target="_blank">https://scostep.org/scostep-course/</a></font><span style="color:rgb(34,34,34);font-family:"times new roman",serif">)</span><span style="font-family:"times new roman",serif"><br></span></div><div><font color="#222222" face="times new roman, serif">Chair ISWI Webinars (<a href="https://iswi-secretariat.org" target="_blank">https://iswi-secretariat.org</a>/</font><span style="color:rgb(34,34,34);font-family:"times new roman",serif">)</span></div><div><span style="font-family:"times new roman",serif"><br></span></div><div><span style="font-family:"times new roman",serif">Av. Independencia 1800, </span><span style="font-family:"times new roman",serif">Tucumán - Argentina</span><br></div><div><font face="times new roman, serif">
Tel: +54-381-4364093 (ext.7765)<br><a href="mailto:gmolina@herrera.unt.edu.ar" style="font-style:italic" target="_blank">gmolina@herrera.unt.edu.ar</a> /</font></div><div><font face="times new roman, serif"><a href="mailto:m.graciela.molina@gmail.com" target="_blank"><i>m.graciela.molina@gmail.com</i></a></font><br></div></div></div></div></div></div></div></div></div></div></div></div>