<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Aptos;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:12.0pt;
font-family:"Aptos",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
.MsoChpDefault
{mso-style-type:export-only;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 2.0cm 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><div><div><div><p class=MsoNormal><span style='color:black'>Dear Colleagues,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>The XXXVIth URSI General Assembly and Scientific Symposium (URSI GASS 2026) will be held in Krakow, Poland, from August 15 to 22, 2026.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>We invite you to submit contributions to <b>Session G07 – The High Latitude Atmosphere</b>.<o:p></o:p></span></p></div><div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>Session Description</span></b><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>A multidisciplinary and multi-instrument approach, supported by advanced modeling efforts, is essential to advancing our understanding of the high-latitude atmosphere, including the ionosphere, and the broader geospace environment. Addressing some of the most pressing scientific questions in atmospheric and space physics requires collaborative and integrative strategies. Key questions include:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>1. How are different atmospheric layers coupled in the polar regions?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>2. How does the upper polar atmosphere, comprising the mesosphere, thermosphere, and ionosphere, respond to increased geomagnetic activity and energy input from space?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>3. How does the polar atmosphere influence short- and long-term climate variability?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Answering these questions will not only enhance our understanding of polar atmospheric processes but also significantly improve insights into global atmospheric dynamics. These research efforts contribute to AGATA (Antarctic Geospace and ATmosphere reseArch), a newly endorsed Scientific Research Programme by SCAR (Scientific Committee on Antarctic Research) and recognized by ICARP IV (Fourth International Conference on Arctic Research Planning) coordinated by the IASC (International Arctic Science Committee) as an open platform for collaboration among scientists and stakeholders.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>We invite contributions that tackle key scientific challenges in atmospheric and space physics, including whole-atmosphere coupling, the impacts of space weather, and the response of the polar atmosphere to climate variability and change. We especially encourage submissions that present innovative tools, observational methodologies, and interdisciplinary approaches to upper atmosphere (including also ionosphere) and high-latitude research, ranging from advanced ground-based and space-borne instrumentation to emerging modeling techniques such as data assimilation and AI-driven forecasting.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>URSI also offers a rich program for students and young scientists, including awards and competitions.</span></b><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Important Information and Useful Links<o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>Paper submission </span></b><span style='color:black'>(deadline: January 25, 2026):<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><a href="https://www.eventure-online.com/eventure/login.form?A094859a9-5d82-40b2-8667-d3c6e7d18a9c" target="_blank">https://www.eventure-online.com/eventure/login.form?A094859a9-5d82-40b2-8667-d3c6e7d18a9c</a><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>Student Paper Competition</span></b><span style='color:black'>: <a href="https://www.ursi-gass2026.pl/studentpaper" target="_blank">https://www.ursi-gass2026.pl/studentpaper</a><o:p></o:p></span></p></div><div><p class=MsoNormal><b><span style='color:black'>Young Scientist Award</span></b><span style='color:black'>: <a href="https://www.ursi-gass2026.pl/youngscientist" target="_blank">https://www.ursi-gass2026.pl/youngscientist</a><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Kind regards,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Liliana Macotela (NORCE, Norway)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Wojciech Jacek Miloch (UiO, Norway)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Giorgiana De Franceschi (INGV, Italy)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Ralph Latteck (IAP, Germany)<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='color:black'>Lucilla Alfonsi (INGV, Italy)<o:p></o:p></span></p></div></div></div></div></div></body></html>