CEDAR email: Call for Abstracts: EGU26 Session (ST3.2)- Dynamics, Chemistry, and Coupling in the Middle Atmosphere and MLT Regions

[Sovit Khadka]

Dear Colleagues,


We would like to invite you to submit abstracts to the 2026 EGU General
Assembly session - "*Dynamics, Chemistry, and Coupling in the Middle
Atmosphere and MLT Regions.*" The EGU26 meeting will take place from May 03
to 08, 2026, in Vienna, Austria, and online.


          *****Session Details*****

Session Title: ST3.2/AS3/PS4 - Dynamics, Chemistry, and Coupling in the
Middle Atmosphere and MLT Regions

Section: Solar-Terrestrial Sciences

Session Link: *https://www.egu26.eu/session/57170
<https://www.egu26.eu/session/57170>*

Conveners: Sovit Khadka, Linda Megner, Kimberlee Dubé, Maosheng He,
and Juan Antonio Añel

Invited Speakers: Daniel March (University of Leeds) and Gunter Stober
(University of Bern)


*Session Description:*

The Earth's middle atmosphere, mesosphere, and lower thermosphere (MLT)
region provide a great platform for studying ionospheric dynamics,
disturbances, eddy mixing, atmospheric drag effects, and space debris
tracking. The thermal structure of these regions is influenced by numerous
energy sources such as solar radiation, chemical, and dynamical processes,
as well as forces from both above (e.g., solar and magnetospheric inputs)
and below (e.g., gravity waves and atmospheric tides). Solar atmospheric
tides, related to global-scale variations of temperature, density,
pressure, and wind waves, are responsible for coupling the lower and upper
layers of the atmosphere and significantly impact their vertical profiles
in the upper atmosphere. With evidence of climate change impacts on the
middle and upper atmosphere, monitoring and understanding trends through
observational data is critical. There has been a contraction of the
stratosphere and a decrease in the density of the upper atmosphere, which
could impact the accumulation of space debris. This session invites
presentations on scientific work related to various
experimental/observational techniques, numerical and empirical modeling,
and theoretical analyses on the dynamics, chemistry, and coupling processes
in the altitude range of ~ 20 km to 180 km of the middle atmosphere and MLT
regions, including long-term climatic changes.


We look forward to your contribution to our EGU26 session.

Please note that the abstract submission deadline is *Thursday, 15 January
2026, at 13:00 CET*.


Thank you.


Sincerely,

*The Conveners Team:* Sovit Khadka, Linda Megner, Kimberlee Dubé, Maosheng
He, and Juan Antonio Añel
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