<div dir="ltr"><p>Dear CEDAR Community,</p>
<p>We are pleased to announce the <strong><a href="https://trends2026.casconf.cn/">13th International Workshop on Long-Term Changes and Trends in the Atmosphere</a></strong>, to be held:</p>
<p><strong>Dates:</strong> May 18–22, 2026<br><strong>Location:</strong> Beijing, China</p>
<p>The workshop will focus on the following topics:</p>
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<p>Observed and simulated long-term changes and trends in the middle atmosphere</p></li>
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<p>Observed and simulated long-term changes and trends in the ionosphere and thermosphere</p>
</li>
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<p>Physical drivers and mechanisms of long-term changes and trends in the middle and upper atmosphere</p>
</li>
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<p>Other relevant topics (miscellaneous)</p>
</li>
</ul>
<p>Note: “Trends” refers to systematic, often linear changes over time, while “long-term changes” encompasses broader persistent variations, including nonlinear, episodic, or abrupt shifts.<strong></strong></p><p><strong>Registration and abstract submission will open in October 2025.</strong></p>
<p>We look forward to your participation and contributions.</p>
<p>Sincerely,<br>
Liying Qian<br>
on behalf of the Workshop Scientific Organizing Committee and the Local Organizing Committee</p>
<p></p></div>