AS1.1 – Numerical weather prediction, data assimilation and ensemble forecasting

AS1.2 – Forecasting the weather and aviation meteorology

AS1.4 – Biases in weather and climate models: representing uncertain sub-grid processes, understanding large-scale drivers, and paths to improvement (co-organized)

AS1.5 – High resolution weather and climate models on large supercomputers (co-organized)

AS1.6 – Machine learning for Earth System modelling (co-organized)

AS1.7 – Subseasonal-to-Seasonal (S2S) Prediction: meteorology and impacts (co-organized)

AS1.16 – Polar meteorology and climatology and their link to changes in the cryosphere (co-organized) | PICO

AS1.18 – Mid-latitude Dynamics, Cyclones and Storms: Diagnostics, Trends, and Impacts (AS Division Outstanding ECS Lecture by Gabriele Messori)

AS1.21 – Northern Hemisphere winter dynamics: remote drivers and predictability

AS1.24 – Stratospheric dynamics

AS1.26 – Infrasound, acoustic-gravity waves, and atmospheric dynamics

AS1.27 – Atmospheric Convection

AS1.30 – Convective and Volcanic Clouds (CVC) (co-organized)

AS1.32 – Precipitation: Measurement, Climatology, Remote Sensing, and Modeling

AS1.34 – The global monsoons in current, future and palaeoclimates and their role in extreme weather and climate events (co-organized)

AS1.38 – Tropical Meteorology and Tropical Cyclones (co-organized)

AS1.39 – Process to cloud-scale modelling | PICO

AS1.40 – Clouds, Aerosols, Radiation and Precipitation (General Session)

AS1.41 – Aerosols, radiation and clouds over the southeast Atlantic

AS2.1 – Air-Land Interactions (General Session) (co-sponsored by iLEAPS) (co-organized)

AS2.2 – Atmospheric Boundary Layer: From Basic Turbulence Studies to Integrated Applications

AS2.3 – Boundary Layers in High Latitudes (co-organized) | PICO

AS2.5 – Physical processes of Air-Sea Interaction and their representation (co-organized)

AS3.1 – Aerosol Chemistry and Physics (General Session)

AS3.2 – Atmospheric Surface Science

AS3.3 – Atmospheric Ice Particles

AS3.4 – Atmosphere – Cryosphere - Biosphere interaction with focus on transport, deposition and effects of dust, black carbon, and other aerosols (co-organized)

AS3.8 – Remote Sensing of Clouds and Aerosols: Techniques and Applications

AS3.10 – MAX-DOAS and other scattered light DOAS systems: instruments, techniques and applications

AS3.11 – SENTINEL-5 PRECURSOR MISSION: Status and Results after about 1 Year of Operations

AS3.12 – Satellite observations of tropospheric composition and pollution, analyses with models and applications

AS3.13 – Atmospheric composition, aerosols and trace gases in the Mediterranean and Arabian basins

AS3.15 – Air Pollution Modelling (including Vilhelm Bjerknes Medal Lecture by Johannes Lelieveld)

AS3.16 – Gas Phase Composition and Reactivity

AS3.17 – Air pollution in Asia

AS3.18 – Urban Air Quality and Greenhouse Gases

AS3.19 – Atmospheric composition variability and trends (co-organized) | PICO

AS3.20 – Atmospheric gases and particles: metrology, quality control and measurement comparability

AS3.21 – Remote Sensing of Atmospheric Carbon Dioxide and Methane

AS3.22 – Science-based Greenhouse Gas Emission Estimates in Support of National and Sub-National Climate Change Mitigation (co-organized)

AS3.23 – Anthropogenic methane emissions: Linking atmospheric observations with mitigation | PICO

AS3.24 – Atmospheric transport of trace species and aerosols: Modeling and observations

AS3.25 – Halogens in the Troposphere

AS3.26 – Polar Ozone and Polar Stratospheric Clouds

AS3.27 – Observations and modelling of stratospheric aerosol and volcanic influences on climate and atmospheric composition (co-sponsored by SPARC-SSiRC and CMIP6-VolMIP) (co-organized)

AS3.31 – Natural and anthropogenic aerosols: Observations and radiative effects from preindustrial and into the future

AS3.33 – Volatile Organic Compounds in the Atmosphere: Sources, Sinks and Transformations (co-sponsored by iLEAPS) (co-organized)

AS3.36 – Sources, transformations and physical properties of organic aerosols

AS3.37 – Multiphase chemistry of secondary aerosol formation under severe haze

AS4.1 – The atmospheric water cycle: processes, dynamics and characteristics (co-organized)

AS4.7 – Air-sea Chemical Fluxes : Impacts on Biogeochemistry and Climate (co-sponsored by SOLAS and iCACGP)

AS4.9 – Clouds, moisture, and precipitation in the polar regions: Sources, processes and impacts (co-organized)

AS4.20 – Land-Atmosphere Interactions: Implications from Past to Future Climate (co-organized)

AS4.22 – Atmospheric composition, weather and climate in Sub-Saharan Africa | PICO

AS4.25 – Coupled modelling and data assimilation of dynamics and chemistry of the atmosphere (co-organized)

AS4.35 – Large Ensemble Climate Model Simulations: Exploring Natural Variability, Change Signals and Impacts (co-organized)

AS4.36 – Recent Developments in Numerical Earth System Modelling (co-organized)

AS4.42 – Emergency response with atmospheric dispersion models (co-organized)

AS5.1 – International Monitoring System and On-site Verification for the CTBT, disaster risk reduction and Earth sciences (co-organized) | PICO

AS5.3 – Advanced Spectroscopic Measurement Techniques for Atmospheric Science