CEDAR email: Invitation to IAGA Session A13 – IAGA/IASPEI 2025

[Liying Qian]

Dear Colleagues,

The IAGA/IASPEI Joint Scientific Meeting 2025
<https://iaga-iaspei-2025.org/> will be held in Lisbon, Portugal, from 31
August to 5 September 2025.

On behalf of the conveners of IAGA Symposia
<https://iaga-iaspei-2025.org/iaga-symposia/> Session A13 (*"Middle and
Upper Atmosphere: From Solar Variability Influence to Long-Term Changes"*),
I would like to invite you to participate in our session.  *The abstract
submission deadline is 12 March 2025*.

We look forward to your contributions and hope to see you in Lisbon this
summer!

Warmest regards,
Liying Qian (NCAR/HAO)

Conveners:
Liying Qian (USA), Christoph Jacobi (Germany)
Co-conveners:
Nick Pedatella (USA), Luc Damé (France), Ana G. Elias (Argentina)

*A13 Middle and upper atmosphere: From solar variability influence to
long-term changes*

In the middle and upper atmosphere, solar electromagnetic and particle
variability is a dominant forcing mechanism for atmospheric variability at
time scales from hours to decades. In addition, long-term changes of
Greenhouse gases (GHGs) in the Earth’s atmosphere have caused warming in
the troposphere, and cooling above it. Changes in Earth’s magnetic field
and solar activity variations are also drivers of long-term changes in the
middle and upper atmosphere. Note that in atmospheric science, long-term
changes (or trends) indicate changes on a time scale longer than one solar
cycle (∼11 years). In this session we aim to stimulate discussion on the
solar variability that drives Earth-system change on time scales from hours
to centuries, and on long-term trends in the atmosphere-ionosphere system,
in the stratosphere, mesosphere, thermosphere, and ionosphere. We welcome
results using ground based as well as satellite observations, model
simulations, and theoretical analyses. We also invite studies on long term
data quality and methods of determination of trends and solar effects on
the atmosphere, and discussions on new missions or observations to address
these issues.
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