Dear colleagues,

We are pleased to invite you to submit abstracts to a COSPAR 2026 session dedicated to solar flares and their effects on planetary atmospheres. The session details are provided below.

Title:
Solar Flares and their Impact on the Atmospheres of Earth and Mars

Abstract:

The influence of solar flares on the Earth’s ionosphere and their possible effect on space weather, communication, and navigation systems remains an outstanding issue in solar-terrestrial physics. Solar flares result in a broadband enhancement to the Sun’s radiative output, from both spectral lines and continua. This sudden increase in solar irradiance causes dynamical and compositional changes in the entire dayside ionosphere.

This interdisciplinary session brings together the physics of solar flares, modellers of planetary ionospheres/atmospheres, and specialists in observations of the dynamics of ionospheric parameters (on both Earth and Mars) caused by solar flares. The session will discuss the driving mechanisms behind changes in solar irradiance and the subsequent geophysical response to deepen our understanding of the solar-terrestrial relationship. We will also discuss this in the context of future solar missions such as Solar-C.

Session information:
https://www.cospar-assembly.org/admin/session_cospar.php?session=1429
Abstract submission:
https://www.cospar-assembly.org/assembly/
COSPAR 2026 information:
https://cospar2026.org/

We very much look forward to meeting you in Florence!

Kind regards,
The COSPAR-26-C1.5 Session Organising Committee