<div dir="ltr"><div dir="ltr"><p>Dear CEDAR community,</p><p>We are pleased to announce that <strong>Registration and Abstract submission are now open </strong>for<strong> </strong>the <strong><a href="https://trends2026.casconf.cn/" target="_blank">13th International Workshop on Long-Term Changes and Trends in the Atmosphere</a></strong>, to be held <strong>May 18–22, 2026</strong>, in <strong>Beijing, China</strong>.</p><p>Topics include long-term variations and trends in the middle atmosphere, ionosphere, and thermosphere, as well as their underlying physical, chemical, and radiative mechanisms.</p><p>We look forward to your participation!</p><p></p><p>Sincerely,<br>Liying Qian<br>on behalf of the Scientific and Local Organizing Committee</p></div>
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