Symposium, which focuses on troposphere to thermosphere-ionosphere multi-scale wave coupling. New measurements, computational modeling and theoretical results, and analysis techniques are encouraged, including electrodynamical and chemical studies. In particular, studies in the following areas are most welcome:

1. Global structure, variability, and sources of gravity waves, planetary waves, Kelvin waves, and tides.

2. Secondary wave generation, propagation, and their effects on the neutral and ionized atmosphere.

3. Ion-neutral coupling processes in the atmosphere-ionosphere.

4. Ionosphere-thermosphere-mesosphere response to lower and middle atmosphere variability.

This symposium is also an open forum for ROSMIC (Role of the Sun and the Middle atmosphere/thermosphere/ionosphere In Climate) related activities and contributions.

The event has a focus on new results concerning the middle atmosphere and lower ionosphere response to a variety of external forcings such as (but not restricted to) energetic particle precipitation (EPP) and solar UV variability during the solar cycle.

This event is particularly is relevant for the international SPARC initiative SOLARIS-HEPPA investigating solar influence on the middle atmosphere and climate, for the project ROSMIC (Role of the Sun and the Middle atmosphere/thermosphere/ionosphere in climate) inside the VarSITI (Variability of the Sun and its Terrestrial Impact) program, as well as for the SolarMIP project devoted to the inter-comparison of the response of coupled climate models to solar irradiance variations.

Of special interests are the long and deep minima of 23rd solar cycle, the treatment of EPP in chemistry-climate models, and the climate system response to solar forcing. Analyses of ground-based or satellite observations, or model simulations, are welcome.

Received on Dec 28, 2017
Jie Zhang , ISEST co-leader

The study of solar transients (CMEs, flares, SEPs and CIRs) and how they impact on the Earth and the heliosphere have advanced greatly in the last decade, thanks to multi-spacecraft observations and high performance numerical MHD simulations. Observations of these transients in the small scale near the Sun and the seamless tracking from the Sun to the Earth in the large scale are enabled by a suite of remote-sensing and in-situ instruments, including SOHO, HINODE, SDO, STEREO, IRIS, ACE, WIND, and other synoptic solar and geospace observations. MHD simulations have advanced rapidly, allowing data-driven modeling of realistic events and real-time prediction. In this session we invite contributions based on models and/or observations of solar transients, covering the initiation of CMEs and flares, CME propagation in the heliosphere, CME-driven shocks, the link between CMEs and SEPs, prediction of their arrival times and geo-effectiveness, CIRs, and other general topics on solar transients and their effects on the Earth and in the heliosphere.