This session welcomes all studies on Mars science and exploration. With many active missions, Mars research is as active as ever, and new data come in on a daily basis. The aim of this session is to bring together disciplines as various as geology, geomorphology, geophysics, and atmospheric science. We look forward to receiving contributions covering both past and present processes, either pure Mars science or comparative planetology (including fieldwork on terrestrial analogues), as well as modeling approaches and laboratory experiments (or any combination of those). New results on Mars science obtained from recent in situ and orbital measurements are particularly encouraged, as well as studies related to upcoming missions and campaigns (ExoMars, Mars Sample Return).

This session addresses novel remote sensing and in-situ measurement approaches for the exploration of Solar System atmospheres, bodies, ring systems, and magnetospheres. It includes such approaches as the opportunistic use of spacecraft assets to acquire bonus science data, dual-use or multi-use instrument technologies, innovative measurement and analysis techniques (including the use of AI), and creative solutions to increase science operations efficiency. Results from past and current implementations, as well as “out-of-the-box” concepts for future missions and instruments, are welcome.

Stable and radiogenic isotopic records have been successfully used for investigating various terrestrial and marine sequences in term of special events including geological boundaries, fossils, evaporative rocks, palaeosols, lacustrine, loess, caves, peatlands. The session includes contributions using isotopes along with sedimentological, biological, paleontological, mineralogical, chemical records in order to unravel past and present climate and environmental changes or as tracers for determining the source of phases involved. Directions using triple isotopes, clumped isotopes, biomarkers and non-traditional stable isotopes are welcomed.
Contributions presenting an applied as well as a theoretical approach are invited, including papers related to reconstructions (at various time and space scales), fractionation factors, measurement methods, proxy calibration, and verification.

Environmental changes and the geodynamic evolution of continents have facilitated both the emergence of life on Earth and the diversification of mineral species from the early Archean until today. However, the physico-chemical conditions of ancient environments remain poorly understood, particularly regarding the processes and consequences of major oxygenation events (e.g., the Great Oxidation Event, Neoproterozoic Oxygenation Event, and Phanerozoic Oceanic Anoxic Events) and associated mass extinctions, as well as the influence of continents and mantle processes in modulating ocean chemistry at different times in Earth’s history.
Understanding key processes shaping modern and ancient environments; such as weathering, hydrothermal alteration of the oceanic crust, bacterial activity, sedimentation, and diagenesis; is crucial for reconstructing paleo-environments. Redox processes and Earth’s oxygenation during critical transitions and biotic crises are central to unraveling the links between environmental change and biological evolution.
With this session, we encourage contributions from the interdisciplinary fields of geochemistry, oceanography, sedimentology, mineralogy, and geo(micro)biology with a particular emphasis on geochemical and isotope-based approaches to redox reconstructions, element cycling, and paleoenvironmental modeling. We welcome studies addressing the evolution of early life habitats, biomineralization, and paleobiological responses during intervals of profound environmental and climatic change, highlighting the links between Earth's chemical evolution and life.

This session invites contributions on the latest developments and results in lidar remote sensing of the atmosphere, covering • new lidar techniques as well as applications of lidar data for model verification and assimilation, • ground-based, airborne, and space-borne lidar systems, • unique research systems as well as networks of instruments, • lidar observations of aerosols and clouds, thermodynamic parameters and wind, and trace-gases. Atmospheric lidar technologies have shown significant progress in recent years. While, some years ago, there were only a few research systems, mostly quite complex and difficult to operate on a longer-term basis because a team of experts was continuously required for their operation, advancements in laser transmitter and receiver technologies have resulted in much more rugged systems nowadays, many of which are already operated routinely in networks and several even being fully automated and commercially available. Consequently, also more and more data sets with very high resolution in range and time are becoming available for atmospheric science, which makes it attractive to consider lidar data not only for case studies but also for extended model comparison statistics and data assimilation. Here, ceilometers provide not only information on the cloud bottom height but also profiles of aerosol and cloud backscatter signals. Scanning Doppler lidars extend the data to horizontal and vertical wind profiles. Raman lidars and high-spectral resolution lidars provide more details than ceilometers and measure particle extinction and backscatter coefficients at multiple wavelengths. Other Raman lidars measure water vapor mixing ratio and temperature profiles. Differential absorption lidars give profiles of absolute humidity or other trace gases (like ozone, NOx, SO2, CO2, methane etc.). Depolarization lidars provide information on the shapes of aerosol and cloud particles. In addition to instruments on the ground, lidars are operated from airborne platforms in different altitudes. Even the first space-borne missions are now in orbit while more are currently in preparation. All these aspects of lidar remote sensing in the atmosphere will be part of this session.

Jupiter’s icy moons – Europa, Ganymede, and Callisto – are at the center of planetary science curiosity, particularly in the search for habitability in the solar system. In this context, ESA’s Jupiter Icy moons Explorer (Juice) is on its way to the Jovian system after its successful Venus gravity assist in August 2025 and is joined by NASA’s Europa Clipper following its launch in October 2024 and its Mars flyby in March 2025.

This session invites contributions from the science community related to these two missions’ objectives. This includes, but is not limited to, better understanding of Jupiter icy moons’ surface properties, internal structures and dynamics of their subsurface oceans, as well as implications for habitability. The session will also cover the moons’ complex interactions with the space environment and their dynamic evolution within the Jovian system. Finally, abstracts related to observations and future science opportunities during cruise are also welcome.

As we reflect on this unique opportunity of having two spacecrafts in the Jovian system at the same time, the session will highlight the scientific opportunities offered by each mission as well as by the dual-spacecraft configuration, emphasizing the synergistic potential of Europa Clipper and Juice.

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.

Later this year, the joint ESA/JAXA mission BepiColombo will enter orbit around Mercury.
After the separation from their transfer module, the two orbiters MPO (Mercury Planetary Orbiter, ESA) and Mio (Mercury Magnetospheric Orbiter, JAXA) will pass through unexplored regions of the Hermean Environment.
Together with previous mission data of Mariner 10, MESSENGER, and BepiColombo swingbys along with insights from numerical modelling, we will be able to investigate, adapt, and improve our understanding of Mercury's origin, formation, composition, interior structure, and magnetospheric environment.

This session aims to bring together studies that present the state-of-the-art knowledge, and studies that explore the potential new data and approaches for future BepiColombo observations.
In particular, we invite studies that highlight the outstanding open questions the open questions about the Hermean environment, the progress made in addressing these questions, and the observations, models, and laboratory experiments needed to support further advances.

The satellites of the outer solar system show huge diversity in their chemical makeup, internal structures, surface geology, underpinning geophysics, and habitable potential. The habitability of these bodies is a property of their physical systems, and hence depends on a range of interacting geophysical, chemical, and celestial mechanical processes, including - but not limited to - climate, impacts and erosion, cryosphere,and ocean dynamics. Many of these different aspects are non-trivially coupled; understanding these worlds requires insight from multiple angles and subdisciplines, from Earth and Planetary scientists alike. This session aims to highlight the diversity of solar system moons, through a wide range of contributions covering atmospheres to the deep interior, instrumentation, laboratory work, and comparative planetology. We welcome contributions from all manner of studies focused on the scientific and technological advancements needed to further our understanding of icy and rocky outer solar system moons.

All science has uncertainty. Global challenges such as disaster risk, environmental degradation, and climate change illustrate that an effective dialogue between science and society requires clear communication of uncertainty. Responsible science communication conveys the challenges of managing uncertainty that is inherent in data, models and predictions, facilitating the society to understand the contexts where uncertainty emerges and enabling active participation in discussions. Uncertainty communication can play a major role across the risk management cycle, especially during decision-making, and should be tailored to the audience and the timing of delivery. Therefore, research on quantification and communication of uncertainties deepens our understanding of how to make scientific evidence more actionable in critical moments.

This session invites presentations by individuals and teams on communicating scientific uncertainty to non-expert audiences, addressing topics such as:

(1) Innovative and practical tools (e.g. from social or statistical research) for communicating uncertainty
(2) Pitfalls, challenges and solutions to communicating uncertainty with non-experts
(3) Communicating uncertainty in risk and crisis situations (e.g., natural hazards, climate change, public health crises)

Examples of research fitting into the categories above include a) new, creative ways to visualize different aspects of uncertainty, b) new frameworks to communicate the level of confidence associated with research, c) testing the effectiveness of existing tools and frameworks, such as the categories of “confidence” used in expert reports (e.g., IPCC), or d) research addressing the challenges of communicating high-uncertainty high-impact events.

This session encourages you to share your work and join a community of practice to inform and advance the effective communication of uncertainty in earth and space science.

Radar is a prominent tool for studying ice on Earth and is becoming widespread on other planetary bodies. In this session, we hope to bring together all those interested in radar data and analysis to showcase their work, take inspiration from each other and develop new (interdisciplinary) collaborations. We aim for this session to encompass various targets, instruments and applications, such as:

- Targets: snow, firn, land ice, sea ice, lake ice, river ice and permafrost on Earth as well as the surfaces and interiors of Mars, Europa, Ganymede, The Moon, Titan, Venus, Small bodies, etc.
- Instruments: airborne and spaceborne sounders, altimeters, SAR and passive microwave radiometers as well as drones, GPR, ApRES, pRES and other radars.
- Acquisition and processing: hardware, passive measurements, datasets, algorithm development, etc.
- Analysis and interpretation techniques: reflectometry, interferometry, thermometry, specularity, EM simulations, inversion, etc.
- Applications: investigations in surface-, englacial, subglacial and proglacial areas, scattering interfaces, roughness, hydrology, geothermal heat flux, material properties, fabric, modelling/supporting lab work, Earth and extraterrestrial analogues/synergies, etc.

We especially encourage the participation of Early Career Researchers and those from underrepresented groups.

This session covers all aspects of the lunar and deep space exploration missions developed by CNSA, with a focus on the Chang’e series to the Moon and on Tianwen-1, CNSA’s first deep space mission, which successfully operated in Mars orbit and at its surface.

The Chang-E series of missions deployed a broad spectrum of Lunar science investigations, from remote sensing and in-situ measurements to lunar sample return and analysis. Since the Chang-E1 mission, CNSA has successfully launched six lunar exploration missions and brought samples back from the far and near sides of the Moon. It returned a broad harvest of scientific data addressing the formation of the Moon and its geophysical and geological properties, attracting broad interest from the international community. The next two missions, Chang-E 7 and Chang-E 8, are planned to be launched in 2026 and 2028, respectively.

CNSA’s series of deep space missions opened with the Tianwen-1 mission to Mars, launched in July 2020. It successfully achieved orbit, landed, and deployed the Zhurong rover, marking a significant milestone in space exploration. The mission comprises an orbiter and the Zhurong rover, which landed on Utopia Planitia, a large plain in Mars' northern hemisphere. The primary objectives of Tianwen-1 were to investigate the Martian surface, atmosphere, internal structure, magnetic field and geological history. Both the orbiter and rover have collected valuable scientific data, contributing to a deeper understanding of Mars. Its rich harvest of discoveries and their implications for the understanding of Mars will be presented and compared with results from other Mars missions. Tianwen-1 will be followed by two sample return missions: Tianwen-2, which has already been launched and is scheduled to return samples from a near-Earth asteroid in 2027, and Tianwen-3, planned to return samples from Mars.

The session solicits contributions that report on nonthermal solar and planetary radio emissions. Coordinated multi-point observations from ground radio telescopes (e.g., LOFAR, LOIS, LWA1, URAN-2, UTR-2) and spacecraft plasma/wave experiments (e.g., BepiColombo, Solar Orbiter, Parker Solar Probe, UVSQ-Sat, Inspire-Sat 7, Cassini, Cluster, Demeter, Galileo, Juno, Stereo, Ulysses and Wind) are especially encouraged. Presentations should focus on radiophysics techniques used and developed to investigate the remote magnetic field and the electron density in solar system regions, like the solar corona, the interplanetary medium and the magnetized auroral regions. Interest also extends to laboratory and experimental studies devoted to the comprehension of the generation mechanisms (e.g., cyclotron maser instability) and the acceleration processes (e.g., Alfven waves). Further preparations, evaluations, investigations, analyses of forthcoming space missions or nanosatellites (like Juice, SunRISE, UVSQ-Sat NG…) are also welcome.