Program
- Program
- Association Symposia
In a world in which industrialization is proceeding at a significant pace, changes to atmospheric composition have been significant since the start of the Industrial Revolution. These changes impact the climate and air quality, which affect human health and quality of life as well as ecosystems throughout the world. In this session we invite contributions from laboratory studies, field observations (especially recent campaigns), and modelling experiments examining local processes to regional-scale studies to long term trend analysis and projections and space scales (local to global). We particularly invite contributions on the mitigation practices for air quality and climate and on lessons learned from the pandemic lockdowns on air quality and climate. Contributions on the impact of biomass burning and emissions from other extreme events the world has witnessed and experienced over the past decade are also welcome.
As a weather pattern, the Asian monsoon impacts the lives of more than a billion people. With rapid population and economic growth across the monsoon region, it becomes a pressing concern that the monsoon convection coupled to surface emissions is playing a significant role in the region’s air quality. The uplift of pollutants also enhances aerosol–cloud interactions that may change the behavior of the monsoon.
The chemical transport effect of the monsoon system is seen from satellites as an effective transport path for pollutants to enter the stratosphere. The monsoon system is therefore relevant to scales and processes bridging regional air quality, climate change, and global chemistry-climate interaction. We solicit presentations on atmospheric composition and the Asian monsoon under four general topics: 1) Emissions and air quality in the Asian monsoon region; 2) Aerosols, clouds, and their interactions with the Asian monsoon; 3) Impact of monsoon convection on chemistry; and 4) Upper troposphere – lower stratosphere response to the Asian monsoon. Papers ranging from observations to modeling studies as well as those describing these phenomena in other monsoon systems are welcome.
The threats of meteorological disasters included by climate change have reignited the debate on intentional weather modification. Alternative strategies to mitigate the impacts of severe weather on society are being explored. In the past few decades, the number of severe and adverse weather events has increased several times in many regions. World losses from natural disasters are currently estimated in the hundreds of billions of dollars. According to World Meteorological Organization, more than 50 countries are conducting research and operational projects on weather modification activities such as hail suppression, precipitation enhancement, improvement of atmospheric conditions, fog or smog dispersion, etc.. Several studies have announced promising figures regarding the potential for temperature amelioration locally. A growing number of studies have announced promising prospect on mitigating adverse effects caused by several weather events.
This session aims to provide a platform for exchanging the knowledge, activities, and technologies on weather modification. Topics of this session including but not limited to cloud and precipitation physics, rain enhancement, hail suppression, fog dispersal, etc.. Technologies such as numerical simulation, monitoring, evaluation, equipment developing, field and laboratory experiments for cloud seeding, etc., and research on cloud macro- and microphysical characteristics and related mechanisms, cloud water resource, observational technologies for cloud and precipitation are all welcomed.
Papers are solicited on theoretical, observational, laboratory and numerical modelling studies of cloud and precipitation microphysics, aerosols, chemistry and dynamics. The following topics (list non exhaustive) will be covered: Basic cloud and precipitation physics (including cloud condensation nuclei and ice nucleating particles and primary and secondary ice formation processes); ice nucleating particle measurements/monitoring; laboratory cloud simulation experiments; dynamics, microphysics and aerosol/chemistry in different type of clouds (fog, boundary layer, convective, severe storms, mid-level stratus, cirrus,..); cloud electrification; aerosol/cloud/precipitation interaction; cloud chemistry and its effect on atmospheric composition; clouds, aerosols and climate (including radiative properties of clouds); measurement techniques and instrument development; planned and inadvertent weather and climate modification. Papers on all these topics are solicited. As part of the symposium, there will be joint sessions on cloud-aerosol interactions between ICCP and iCACGP and a joint session on polar clouds-aerosol-precipitation between ICCP and ICPM.
The symposium focuses on advances in atmospheric dynamics based on theoretical, observational, diagnostic, and modelling studies. It deals with atmospheric phenomena of very different spatial scales including mesoscale, synoptic- and planetary-scales. Contributions are expected on storm track and jet-stream dynamics, eddy-mean flow interactions, frontal systems, cyclone and anticyclone evolution, blocking, stationary waves, stratosphere-troposphere coupling, dynamical connections between low, middle, and high-latitudes, and modes of atmospheric variability. We also welcome contributions that use machine learning as a method for improving our understanding of these phenomena and processes.
The symposium focuses on dynamical processes that govern short-and long-term (climatic) state of the atmosphere influenced by orography, covering both wet and dry dynamics and a wide range of spatial and temporal scales. A special emphasis is on exchange processes of mass, momentum, energy between mountainous terrain and the free troposphere at all relevant scales. Contributions based on theoretical, observational, modeling, or combined approaches are invited on a range of topics including, but not limited to, orographic precipitation, mountain wind storms, convective initiation in complex terrain, gravity waves and gap flows, thermally-driven local circulations, mountain venting and meso-scale exchange processes, complex-terrain boundary-layer processes, air quality in complex terrain, hazards and extreme events and predictability of terrain-induced flows. Contributions addressing physical process studies, high-resolution numerical modeling and physical parameterizations as well as measurement techniques and observations from complex terrain field campaigns are all welcome.
The symposium focuses on recent advances in our understanding of the tropical circulation and thermodynamics. Relevant topics include, but are not limited to: the interactions with convection and clouds, equatorial waves, mesoscale convective systems, tropical cyclones, precipitation, reduced and full-complexity model for analysis and forecasting of tropical flows. Contributions quantifying the interactions and feedback between different scales and processes, and their relative roles in driving tropical variability (e.g. Madden-Julian oscillation) in observations, (re)analyses, and weather and climate models are encouraged. Insights from recent observational campaigns and new satellite measurements are particularly welcome, as are contributions on the impact of new observations on prediction skill of numerical weather prediction models in the tropics. We also encourage contributions on the frontier challenges in tropical data assimilation, ensemble forecasting and predictability using machine learning.
Process-level understanding of moist convection is relevant to many aspects of weather forecasting and climate simulation. Moist convection in the atmosphere is inherently a multi-scale phenomenon, from processes on the scale of cloud and precipitation particles, to cloud turbulence and entrainment, to cloud-scale updrafts and downdrafts, to mesoscale organization and the interaction of cloud fields with the large-scale environment. A key aspect is how these processes interact over this huge range of scales. This symposium is focused particularly on the dynamical and microphysical processes determining the properties of cumulus clouds and how they interact with the environment. Contributions are welcome on a range of relevant topics including aerosol-microphysics-dynamics interactions, precipitation development in cumulus clouds, entrainment and detrainment, cloud turbulence, updraft and downdraft dynamics, the shallow-to-deep convective transition, convective-cold pool interactions, and convective organization and upscale growth. These could include perspectives from observations, theory, and/or modeling, including parameterization development.
The symposium will focus on mesoscale phenomena. Topics will include the dynamics and phenomenology of hazards associated with convective storms in the present climate and within the context of climate change, including mesoscale convective systems, isolated thunderstorms, hailstorms, supercells and tornadoes, lightning, heavy rainfall and (flash) floods, windstorms, downbursts, in connection with the extra-tropical cyclones and hurricanes responsible for these localized events. Contributions are encouraged on hybrid cyclones, such as subtropical cyclones, polar lows and medicanes, considering the growing interest to objectively quantify the gray areas among the categories of tropical and extratropical cyclones and to better explore the processes leading to their development and intensification. Topics related to lower troposphere phenomena (e.g., boundary layer convection, air mass boundaries, such as fronts, drylines, sea breezes, outflow boundaries, and gravity waves) and mesoscale coastal phenomena will also be encouraged, with particular attention to their effect on heavy rainfall events. Contributions exploring the effect of aerosols as an ingredient which may play a role in triggering, reinforcing, or attenuating these events are of interest. Studies addressing different temporal and spatial scales are encouraged, using both modeling and observational tools. The session will include both present-day analysis (numerical modeling, reanalysis data, satellite and radar observations, machine learning/artificial intelligence methods, results from past and future field campaigns, ...), forecasting at different time ranges (including nowcasting), climatology, risk assessment, innovative early warning systems, climate change analysis (starting from climate model simulations), and attribution studies (such as pseudo-global warming simulations).
The Middle Atmosphere Symposium covers all aspects of middle atmospheric science, with emphasis on the interaction between dynamics, radiation and chemistry within the middle atmosphere itself and between the middle atmosphere and the troposphere. Observational, modelling, theoretical, and laboratory studies are all solicited. Research topics include (but are not limited to):
- Gravity waves, their generation, propagation and breaking
- Sub-seasonal to decadal dynamical variability in the Middle Atmosphere
- Middle Atmosphere response to anthropogenic and natural forcings
- Stratospheric/Mesospheric chemistry and ozone
- Radiation, microphysics, chemistry and dynamics at the tropopause
- Transport and mixing in multiple spatial scales
- Tropical / extratropical dynamical interactions
- Vertical coupling in the Middle Atmosphere
- Mechanisms of Stratosphere-Troposphere coupling, at all time scales
- Role of the Middle Atmosphere on surface climate predictions and projections.
Record-shattering weather extremes are occurring more frequently across the world. Over Polar Regions, similar weather extremes receive less attention, but cause events with global sea-level rise implications. The latest IPCC report states that in a warming climate, globally it is expected that there will be an increase in frequency and intensity of weather extremes. Thus, it is essential to understand the drivers of these short-term Polar weather extremes and their often long-term impacts. This session invites presentations on studies that examine Polar weather and climate extremes, including both past events and future predictions, and their subsequent impacts
The solar and terrestrial infrared radiant energy within the Earth-atmosphere system and the exchange of turbulent heat fluxes between the surface and atmosphere are the dominant forms of energy that determine Earth’s climate. In addition, the profile of radiative flux, dry static, moist static, and kinetic energy divergence, and diabatic heating by precipitation are significant flux components in the atmosphere. How these are distributed regionally dictates atmospheric and oceanic transport and the hydrological cycle. This symposium seeks presentations that provide novel new insights into how energy is distributed within the climate system and how and why it is changing. We welcome both observational and modelling studies that encompass the following areas related to Earth’s energy budget: Earth’s energy imbalance and ocean heat storage; the linkages between the energy and water cycles; studies discussing how the energy budget is altered through forcing and feedback mechanisms.
Radiation sciences have proved essential for understanding energy processes and associated balance – and imbalance – within the Earth-Atmosphere system, providing fundamental knowledge of the radiative processes in the climate system and on global observation of climate parameters. Recognizing the importance of the radiation sciences, the International Radiation Commission (IRC) is concerned with research and application topics such as the spectroscopic nature of atmospheric constituents and of the Earth's surface, radiant energy transfer theory and modeling, aspects of radiant energy in climate change and weather, remote sensing of the atmosphere and surface, and observations of radiant energy flow throughout the Earth-atmosphere system. Papers being solicited may include current progress in all of these research areas. In addition, it is encouraged that up-to-date progress in IRC Working Groups (Atmospheric Spectroscopy Applications, Baseline Surface Radiation Network, Clouds and Radiation, Global Energy Balance, International Coordination group for Laser Atmospheric Studies, International Polarized Radiative Transfer, International TOVS Working Group, Solar Ultra Violet Radiation, Three-Dimensional Radiative Transfer, Solar Irradiance, and Hyperspectral Radiation: Measurements and Modelling) is presented in this symposium.
Thunderstorms and lightning are closely related to the dynamical and thermodynamic processes in the atmosphere. In addition, global thunderstorms impact fair weather electricity as part of the global electric circuit. The session aims at presenting on-going research activities on thunderstorm electricity as well as the impacts of lightning and thunderstorms on the upper atmosphere and the global electric circuit. Topics of interest cover lightning detection techniques and data processing, observational and modeling-based studies of thunderstorm electricity, lightning-based thunderstorm nowcasting, lightning data assimilation, artificial intelligence (IA) and lightning, effect of lightning on atmospheric composition, TLEs and energetic radiation, fair weather electricity, and the use of lightning records as an essential climate variable. Results from field and laboratory experiments, space observation, theoretical work and numerical modeling are welcome.
Introduction:
Remote sensing plays a crucial role in understanding the Earth's atmosphere and climate system through the measurement of aerosols, clouds, and radiation. With advancements in technology, the field of remote sensing has witnessed several breakthroughs in recent years. In particular, the emergence of new instruments and techniques allows the retrieval of aerosol optical parameters and cloud microphysical properties, which greatly contributed to the understanding the role of aerosols and clouds in regulating the Earth’s energy budget. This session aims to bring together researchers, scientists, and experts in the field to discuss the latest advances in remote sensing techniques for aerosols, clouds, and radiation.
Objective:
The primary objective of this session is to provide a platform for participants to share and exchange their knowledge, research findings, and experiences related to remote sensing techniques. The session will focus on advancements in the field, challenges faced, and potential solutions for enhancing the accuracy and reliability of remote sensing measurements of aerosols, clouds, precipitation and radiation.
Topics to be Covered:
1. Novel remote sensing instruments and platforms for aerosols, clouds, precipitation and radiation measurements.
2. Calibration and validation techniques for remote sensing instruments.
3. Data fusion and integration of multiple remote sensing datasets.
4. Retrieval algorithms for aerosol and cloud properties.
5. Characterization of aerosol and cloud microphysical and optical properties.
6. Advances in particle scattering and radiative transfer theories.
8. Advances in the remote sensing of precipitation.
9. Advances in the measurement of surface and top-of-atmosphere radiation.
8. Satellite-based assessment of aerosol-cloud-precipitation interaction.
Introduction:
Tropical cyclones (TCs) are among the most catastrophic disasters on Earth. They bring strong winds, storm surges, heavy rainfall, and flooding to coastal areas, posing severe potential threats to human life and the economy. With advancements in observations ans theories, we have gained a profound understanding of TC in recent decades. However, the prediction of tropical cyclone numbers, tracks, intensities, sizes, and precipitation has improved only slowly in recent years, indicating that we still lack a systematic understanding of the relevant physical processes. This session aims to to bring together researchers, scientists, and experts in the TC community and explore recent advances in all aspects of TC.
Objective:
The primary objective of this session is to provide a platform for participants to share and exchange their research findings, new ideas, and experiences related to tropical cyclones. We hope this session will help advance the understanding and prediction of tropical cyclones, and reduce the losses of life and economic impacts caused by tropical cyclones.
Topics to be Covered:
1. TC internal dynamics including genesis, (rapid) intensification, structural changes, and rainband activity;
2. TC interactions with the environment, including vertical shear, terrain, oceans, and mid-latitude systems;
3. TC prediction skills, ranging from nowcasting to seasonal prediction, data assimilation, and machine learning;
4. TC activity response to climate change.
The Atlantic Meridional Overturning Circulation (AMOC) is a critical component of the Earth's climate system, redistributing heat, freshwater, and nutrients across the globe. Understanding the impacts and behavior of this ocean current system in a rapidly changing climate is essential. This session will focus on understanding the regional and far-reaching climate impacts of changes in the AMOC, as well as the external factors that influence its strength and variability. We aim to enhance our knowledge of AMOC's role in global and regional climate regulation through a comprehensive approach that integrates, but is not limited to, modeling insights with observations. Join us for a focused discussion on AMOC's influence on the climate system and the factors contributing to its changes.
Monsoon systems in widespread, rapid, and intensifying climate change have experienced some major changes, which are intensifying the water end energy cycles and have profound impacts on extreme weather and climate events. These changes are affecting precipitation patterns, strength and variabilities, and cause more intense floods and drought as well, with significant social consequences. A better understanding of variabilities, dynamics and physics of monsoon systems at different scales in rapid and intensifying climate change and their role in Earth's energy budget and water cycle and extreme weather and climate events so as to better improve prediction and projection of monsoon systems is therefore of a great importance. This symposium invites presentations on all aspects of monsoon system studies, including observational, diagnostic, theoretical, attribution, modelling, prediction and projection research.
Losses from extreme weather and geophysical events have increased globally over the last decades and are expected to further increase in the future because of climatic and socio-economic changes. These losses arise from a complex interplay between human and environmental systems, for which the outcomes are often hard to predict. Yet, developing plans and policies for managing risks from extreme weather and geophysical events is an urgent and paramount task for societies. The inherent interdisciplinary nature of complex climate risks and extremes requires to bring together scientists and practitioners from widely different fields related to the modeling of risk and extremes in human and environmental systems. We will highlight the interdisciplinary nature of these approaches, with the aim of gaining a deeper understanding of complex climate risks and extremes. In this session we welcome contributions focused on:
- Risk quantification and management tools e.g., natural catastrophe models, agent-based models, system dynamic models
- How extreme events and their impacts have varied or are likely to vary under climate change
- How well climate models and reanalysis products capture observed extreme events
- Attribution of extreme events and their impacts
- Emergent constraints on extremes
- Linking dynamical systems extremes to geophysical extremes
- Downscaling of weather and climate extremes and their impacts
- Predictability of extremes using numerical, statistical, simple theoretical, and AI
- Linking the dynamics of climate extremes to their impact
- Tele-coupling and cascading extremes between the climate and socio-economic systems
Regional climate models can be used not only for dynamical downscaling of the GCMs results but for the analysis of a broad spectrum of problems, e.g. in land surface interaction, cloud processes, atmospheric chemistry and many others purposes. The recent trends emphasize increasing resolution, shifting from a few tens of km towards just a few kilometers where so-called convection-permitting mode can significantly contribute to the reality how some processes are captured. This is especially true for precipitation, as well as for introduction of very local processes, like urbanization and local atmospheric chemistry. However, it should be said that this approach is very demanding in terms of computational resources. This lead already in the past to the broader cooperation between the groups (CORDEX), which despite of the demands enable to provide strong ensembles of the simulations for regions of interest with full coverage of necessary scenarios for climate projections. Higher resolution simulations from RCMs can significantly improve the applicability of scenarios outputs for climate change impacts assessment and for further climate services and decission made for adaptation on these changes.
Contributions addressing all these above mentioned aspects, i.e. mountains and land-use effects, impacts of urbanization, effects of the regional climate and atmospheric chemistry interactions, specific regions problems like in polar or tropical areas, as well as broader regional climate modelling science development are welcome to be submitted for this session.
This symposium will focus on atmospheric boundary layer processes. ABL plays a key role in weather and climate, but also in air quality and renewable energy. Still, the comprehensive understanding of the dynamical processes driving ABL evolution and modification, its interactions with the underlying surface and scale interactions with overlying free atmosphere, remain a challenge for meteorology. This is especially true over complex terrain and under strong stratification. We therefore welcome theoretical, observational and numerical studies that target the physical processes occuring in the ABL, including turbulence, interactions with the surface, and interactions with the free atmosphere. Topics encouraged within the session include results from observational campaigns focusing on ABL processes (especially over heterogeneous or mountainous terrain, urban or glaciated surfaces), interactions between the ABL and larger scale flows such as downslope windstorms, Surface Energy Balance closure studies, ML and other advances in turbulence closure and surface turbulence parametrizations, representation of complex and heterogeneous terrain in numerical models of the atmosphere.