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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Dear CEDAR community,</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">We cordially invite you to participate in our session - "<b>Impacts of Natural and Artificial Hazards on the Upper Atmosphere</b>" - at the
<a href="https://cedarscience.org/2025-joint-cedar-gem-workshop" id="LPlnk750855" class="OWAAutoLink" title="https://cedarscience.org/2025-joint-cedar-gem-workshop" data-auth="NotApplicable" style="margin-top: 0px; margin-bottom: 0px;">
2025 Joint CEDAR/GEM Workshop</a>, taking place from June 22 to 27, 2025, in Des Moines, Iowa. Our session is scheduled for Tuesday, June 24, 2025, from 10:00 - 12:00 CDT.</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Workshop Description:</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black; font-weight: 500;">Synoptic atmospheric hazards, such as hurricanes and strong frontal activity, and defined geological hazards, such as seismic and volcanic activities, can trigger
acoustic and gravity waves that propagate upwards and can be detected in the upper atmosphere. Additionally, man-made artificial, accidental, and intentional explosive events are also equally responsible for generating shock or acoustic wave signatures in
the geospace environment. Observation and modeling of these events can give new insights into our understanding of the dynamics, chemistry, and fundamental coupling processes between the troposphere and the middle and upper atmosphere. In system theory, such
lower atmospheric events can be thought of as a defined input, x(t), into a complex system, h(t), where the CEDAR/GEM community can observe y(t) and gain insight on the fundamental transfer function(s) representing the underlying physical processes controlling
the upper atmospheric response. This workshop welcomes short interactive presentations on the upper atmospheric response to various natural and artificial phenomena occurring in the oceans, on land, and in the lower atmosphere. Such phenomena include but are
not limited to, earthquakes, surface and submarine volcanic eruptions, tsunamis, typhoons, cyclones, hurricanes, tornados, thunderstorms, non-nuclear explosions, nuclear detonations, rocket exhausts, etc., which are studied from different observational and
modeling approaches. Improved capabilities in forecasting these disasters can save hundreds of lives and protect billions of dollars in property from damage. Rapidly growing and practical automated processes, such as Artificial Intelligence (AI) and Machine
Learning (ML), can analyze massive data sets, enabling scientists to gain new insights and optimize performance. These advancements are crucial for hazard-related preparedness and response. The workshop seeks to bring together the CEDAR and GEM communities
from different disciplines and backgrounds so as to fundamentally develop a deeper understanding of the geophysical processes involved. It is anticipated that the impact of this activity can lead to new projects related to natural and artificial hazard-induced
upper atmospheric dynamics, including research-based AI/ML tools that may lead to early warning systems against such disasters.</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Detailed information about the workshop can be found here:
<a href="https://cedarscience.org/workshop/2025-workshop-hazards" id="OWA64ec63f1-df0e-118a-263f-8e3922ffc312" class="OWAAutoLink" data-auth="NotApplicable" style="margin: 0px; text-align: justify;">
https://cedarscience.org/workshop/2025-workshop-hazards</a>. <b>If you would like to contribute to our session, please let us know.</b></span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Looking forward to seeing you at the Joint CEDAR/GEM Workshop!</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Sincerely,</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Sovit Khadka (OSS)</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black; font-weight: 500;">Björn Bergsson (ERAU)</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Pavel Inchin (CPI) </span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black; font-weight: 500;">Hyunju Connor (NASA)</span><span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;"><br>
</span><span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black; font-weight: 500;">Yue Deng (UTA)</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black;">Irfan Azeem (NOAA)</span></p>
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<span style="font-family: Cambria, Georgia, serif; font-size: 11pt; color: black; font-weight: 500;">Sharon Vadas (NWRA)</span></p>
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