AS – Atmospheric Sciences

Programme Group Chair: Philip Stier

Inter- and transdisciplinary sessions led by AS

Session short summary:
À travers des cas d'étude concrets, nous montrerons comment cette méthode permet de suivre les séismes, repérer les explosions, anticiper les orages violents et détecter les éruptions volcaniques. La session abordera enfin l'impact direct de ces travaux sur la sécurité civile, la précision des prévisions météo locales et le renforcement des compétences scientifiques.
Keywords: Atmospheric convection (Atmospheric dynamics), Early warning systems, Infrasound
Inter- and Transdisciplinary Sessions suggestion led by: AS | Atmospheric Sciences
Co-organization suggestions:
AS | Atmospheric Sciences
CL | Climate: Past, Present & Future
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Disciplinary sessions of AS

AS1 –  Meteorology

Proposals are marked in red.

Session short summary:
This session will bring together studies using observations and numerical models to analyze mechanisms, patterns, and characteristics of extreme events. We will explore regional-scale analyses, historical trends, future projections, and model evaluations to advance prediction and support disaster resilience planning.
Keywords: Climate change - adaptation, Climate change - modelling, Numerical weather prediction, Resilience, Weather extreme events
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Session short summary:
Monsoons supply most of the rainwater for billions of people and have profound impacts on the global circulation. Forecasting monsoons remains a challenge and there are large biases in climate simulations, motivating the need for improved knowledge and understanding of monsoon processes to increase our confidence.
Keywords: Climate extremes, Climate variability, Monsoon systems, Regional climate, Tropical climate
Co-organization suggestions:
CL | Climate: Past, Present & Future
HS | Hydrological Sciences
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Session short summary:
This session explores how the stratospheric circulation—including the polar vortex, Brewer–Dobson circulation, and QBO—affects surface weather and climate through wave coupling, downward influence, and chemical transport. We welcome observational, modeling, and theoretical studies of its drivers, variability, and predictive impacts.
Keywords: Atmospheric transport, Predictability, Stratosphere dynamics, Stratosphere-troposphere exchange
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Suggested session
Small-scale Cloud Processes
Session short summary:
This session invites contributions that advance the understanding of small-scale cloud processes. A particular emphasis is placed on synergistic studies that combines laboratory experiments, field observations and/or numerical modelling.
Keywords: Atmospheric field campaigns, Cloud microphysics, Experimental design, Modelling - Atmosphere, Turbulence
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AS2 –  Boundary Layer Processes

Proposals are marked in red.

Session short summary:
The session targets experimentalists and modelers studying air-land interactions from local to regional scales. It covers micrometeorology, atmospheric and remote sensing disciplines. Topics include new devices, measurement techniques, data analysis, surface-layer theory, and fluxes. Focus areas include complex terrain, heterogeneity, energy balance closure, and plant-soil-atmosphere dynamics.
Keywords: Atmospheric boundary layer, Carbon flux, Land-atmosphere interactions, Micrometeorology, Surface energy balance
Co-organization suggestions:
BG | Biogeosciences
HS | Hydrological Sciences
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AS3 –  Atmospheric Composition, Chemistry and Aerosols

Proposals are marked in red.

Session short summary:
This session focuses on progress in the observations of tropospheric composition from satellite platforms. This includes the development of new retrievals, the intercomparison and validation of satellite data, the integration with atmospheric modelling and the application in atmospheric chemistry studies and emission estimates.
Keywords: Air pollution, Air quality modelling, Atmospheric aerosols, Satellites
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Session short summary:
Air pollution mitigation efforts, while essential for improving air quality and protecting public health, can inadvertently trigger complex atmospheric and climate changes, potentially leading to new health risks and socioeconomic challenges. This session explores these impacts by integrating observational data, modeling studies, and projections.
Keywords: Air quality modelling, Air quality observations, Anthropogenic effects, Anthropogenic response, Monitoring strategies
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AS4 –  Interdisciplinary Processes

AS5 –  Methods and Techniques

AS6 –  Short Courses