SEARCHING: IAMAS





JA01 Machine Learning in Geo-, Ocean and Space Sciences (IAGA, IAVCEI, IAHS, IASPEI, IAMAS, IAPSO)

Convener(s): Peter Wintoft (Sweden, IAGA)

Co-Convener(s): Hristos Tyralis (Greece, IAHS), Dave Reusch (USA, IAMAS), Istvan Szunyogh (USA, IAMAS), Fatma Jebri (UK, IAPSO), Gesa Maria Petersen (USA, IASPEI), Silvia Massaro (Italy, IAVCEI)

Description
Modern artificial intelligence (AI), machine learning (ML) and deep learning (DL) techniques are in the process of transforming many different fields of geosciences including for example seismology, the modelling of hydrological systems, space weather studies and oceanography. The progress in the development of ML algorithms combined with the increasing availability of geophysical data and computational power deliver a great promise for transformational advancements with the novel computational techniques. In this joined session, we invite presentations on a broad variety of AI, ML and DL methods, that both, establish new or improve commonly performed data processing, detection, clustering, interpretation, prediction and imaging tasks. In particular, we welcome contributions on the integration of ML techniques to improve the quality of oceanographic, geosciences and space sciences research approaches. The goal of the session is to establish the state of AI, ML and DL across multiple geoscientific fields, and to pave the path forward in taking full advantage of the exciting developments in ML/DL.



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JA02 Data Assimilation and Statistical Learning in Earth and Space Sciences (IAGA, IACS, IAHS, IAMAS, IASPEI)

Convener(s): Tomoko Matsuo (USA)

Co-Convener(s): Patricia de Rosnay (UK, IACS), Julien Aubert (France, IAGA), Larry Kepko (USA,IAGA), Salvatore Grimaldi (Italy, IAHS), Craig Bishop (Australia, IAMAS)

Description
This symposium will serve as a forum on the latest research and development in data assimilation and statistical learning across Earth and Space Science community. Data assimilation is a powerful statistical learning framework that combines models, observations, and their respective uncertainties, allowing us to unify data-driven scientific induction with first principle-based deductions. The framework in the general form can be applied to any geophysical system, providing the common ground for our forum. On the other hand, applications of data assimilation and statistical learning techniques to sparsely observed geophysical systems (such as the core, mantle, cryosphere, hydrosphere, thermosphere and ionosphere, and magnetosphere) face considerable challenges, requiring innovative adaptation of methods to maximize the use of sparse observations, and considerable research efforts to quantify model and observational uncertainties. This symposium solicits papers that address unique application challenges faced by different disciplines so that we can learn from each other and further our common interest in advancing data assimilation and statistical learning applications in the Earth and Space Sciences.



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JA05 Solar Influence on the Atmosphere and Climate (IAGA, IAMAS)

Convener(s): Christoph Jacobi (Germany, IAGA)

Co-Convener(s): Luc Damé (France, IAGA), Odele Coddington (USA, IAMAS)

Description
The role of the Sun’s influence on past climate as well as in future climate variability keeps attracting much interest presently. State of the art climate models now include a well resolved stratosphere and mesosphere. This allows the prediction of global climate and its changes taking into account expected solar related variability, particularly in the ultraviolet, at short to long time scales. In the middle and upper atmosphere solar related electromagnetic and particle variability is one dominant forcing mechanism for atmospheric variability at time scales from days to decades. In this session we aim to stimulate discussion on the solar variability that drives Earth-system change on time scales from days to centuries. We welcome results from observations, including observations of solar radiation, theoretical work and modeling efforts that facilitate the implementation of solar irradiance in Earth science applications and that quantify meteorological and solar effects on the lower, middle, and upper atmosphere. We also welcome discussions on new missions or observational means to address these issues. Advances in reconstructing past climate and in projecting future climate considering the role of extraterrestrial forcing are also desired.



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JA06 Long-Term Changes in the Stratosphere, Mesosphere, Thermosphere, and Ionosphere (IAGA, IAMAS/ICMA)

Convener(s): Liying Qian (USA, IAGA)

Co-Convener(s): Jan Lastovicka (Czech Republic, IAGA), Bernd Funke (Spain, UAMAS)

Description
Long-term changes of greenhouse gas concentrations not only cause troposphere climate change, they also cause long term changes in the middle and upper atmosphere. Other drivers, such as the long-term changes of the Earth's magnetic field, solar irradiance, and geomagnetic activity, can also contribute to the long-term changes in the atmosphere, especially in the upper atmosphere. Note that in atmospheric science, long term changes, or trends, refer to changes on a time scale longer than one solar cycle (~ 11 years). We welcome papers on investigating trends in the stratosphere, mesosphere, thermosphere, and ionosphere, dealing with ground based as well as satellite borne observations, model simulations, theoretical analyses, long term data quality issues, methods of determination of trends, and related laboratory experiments.



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JC03 Coupling Processes Between the Atmospheric Boundary-Layer and Snow - Ice Surfaces: Modelling at Convection and Snowdrift-Permitting Scales (IACS, IAHS, IAMAS)

Convener(s): Richard Essery (UK,IACS)

Co-Convener(s): Vincent Vionnet (Canada, IACS), Tobias Jonas (Switzerland, IAHS), Rebecca Mott (Switzerland, IAMAS)

Description
This symposium addresses fundamental exchange mechanisms of mass and energy between the cryosphere and the atmospheric boundary layer in snow and ice covered regions. The interaction between the near-surface atmosphere and the cryosphere can lead to significant spatial and temporal variations of momentum, mass and energy exchanges as well as complex atmospheric flow patterns modulated by complexities in topography. These processes strongly affect the evolution of seasonal snow cover, permafrost and glaciers, and drive snow and ice hydrology. Moves towards convection-permitting scales in numerical weather prediction have also brought benefits for resolving atmospheric flows and precipitation in mountainous topography, but coupled modelling at smaller “snowdrift-permitting” scales for which there can be significant redistribution of snow between model grid cells has not yet been so widely investigated. We invite contributions on, but not limited to, the following topics: modelling of turbulent fluxes to snow and ice surfaces in stable boundary layers; advection of energy to snow cover and glaciers, and impacts on snow and ice melt; orographically-induced precipitation and preferential deposition of snowfall; wind-induced snow transport and associated sublimation. Studies in level and mountainous terrains are welcome. We particularly encourage abstracts that propose advances in modelling techniques to represent the physics of coupling the atmospheric boundary layer to snow and ice surfaces, and in applications of high-resolution snow and ice mass balance modelling.



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JC04 Atmospheric Circulations and Surface Mass Balance of Ice Sheets (IACS, IAMAS)

Convener(s): Charles Amory (France, IACS)

Co-Convener(s): Christoph Kittel (Belgium, IACS), Anais Orsi (Canada, IACS), Irina Gorodetskaya (Portugal, IAMAS)

Description
Atmospheric circulations in high latitudes strongly influence the surface mass and energy balances of ice sheets through transport of heat, moisture and momentum. While our ability to simulate their occurrences is improving, uncertainties persist in their dynamical responses to climate change, linkages with multi-scale climate variability, and climatological impacts over ice sheets. Advancing our knowledge of the underlying dynamics is therefore crucial for reliable climate projections over ice sheets and for improved interpretations of ice core paleoclimate records. The objective of this session is to advance our understanding of atmospheric circulations in high-latitude regions and to analyse their impacts in past, present, and future climates. We welcome theoretical, observational and modeling contributions on atmospheric circulations such as blocking, atmospheric rivers, foehn and katabatic flows and their linkages to weather and climate extremes and surface mass balance of ice sheets.



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JC05 Atmosphere-Ocean-Sea Ice Interactions: Physical and Chemical Processes (IACS, IAMAS, IAPSO)

Convener(s): Takenobu Toyota (Japan, IACS), Xin Yang (UK, IAMAS)

Co-Convener(s): Kim Strong (Canada, IAMAS), David Tarasick (Canada, IAMAS), William Perrie (Canada, IAPSO)

Description
The rapid change of polar climate over the past several decades has significantly affected the atmosphere-ocean-sea ice (AOI) interface and thereby interactions such as the exchanges of energy and chemical compounds through physical and chemical processes. These processes are linked together via chemical compound and particle exchanges at air-snow interfaces, snow processes, polynya formation, sea-ice production and deep-water formation. AOI interactions can be triggered also by short-term synoptic and mesoscale weather phenomena such as cold air outbreaks, katabatic winds, and polar lows. Thus, changes in polar weather and meteorology may influence the natural processes involved in polar atmospheric chemistry. However, the representation of these physical and chemical processes and interactions at different spatial and temporal scales remains a major challenge for current weather and climate models. This symposium aims to brings together researchers working in the areas of atmospheric chemistry (Part I) and physics (Part II) to demonstrate their latest findings, highlight gaps in our understanding of the physical and chemical aspects of polar climate and the polar surface boundary layer, and inspire further investigation and collaboration. Part I focuses on but is not limited to: lower tropospheric oxidizing capacity; ozone; reactive halogens and nitrogen; mercury; snow chemistry on sea ice, tundra and ice sheets; sea salt aerosol from blowing snow; and particulate chemistry. Part II focuses on but is not limited to: atmospheric and oceanic boundary layers, sea ice and snow-cover processes as well as global change related to the marine Arctic and Antarctic. Further focus is on snow cover modelling, ablation and accumulation on sea ice; and processes or parameterizations of physical and chemical exchange, and transport, including the influence of sub-mesoscale ocean dynamics, where observational challenges can be addressed. Contributions dealing with theoretical and observational studies, remote sensing, or numerical modelling are welcome.



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JG03 Remote Sensing and Modelling of the Atmosphere (IAG, IAGA, IAMAS, IAVCEI,)

Convener(s): Michael Schmidt (Germany, IAG)

Co-Convener(s): Ehsan Forootan (Denmark, IAG), Loren Chang (Taiwan, China, IAGA), Claudia Stubenrauch (France, IAMAS), Fabio Dioguardi (Italy, IAVCEI)

Description

Satellite observations provide a continuous survey of our planet’s surrounding atmosphere, which is structured into distinct layers, according, e.g. to temperature or charge state.

Space weather effects are observed in the magnetosphere, ionosphere, plasmasphere and thermosphere; its impacts and risks are gaining more and more importance in politics and sciences, because the demands of communications and precise positioning are ever increasing in the modern society.

Stratosphere and troposphere and their constituents are essential for life on our planet, and tropospheric water vapour is source of clouds and precipitation, which in turn affect the large-scale circulation through heat transfer. Radiative forcing induced by external factors like changes in aerosol and greenhouse gas concentrations leads to feedbacks which are still an important uncertainty source in modelling climate change. The synergistic use of different instruments and modelling is leading to major advances in the understanding of our climate.

This symposium invites contributions on advances in observing, modelling, and understanding our atmosphere – from troposphere to magnetosphere. Specific topics are:

- (near) real-time approaches to monitor and forecast the atmospheric state

- combination of various observation techniques and improvement of the representation of atmospheric key parameters in models

- monitoring the Earth by Global Navigation Satellite Systems (GNSS) and other measurement techniques

- studies on space weather research and coupling processes in the upper atmosphere

- aerosol, cloud, precipitation and radiation processes as well as interactions in the climate system

- data assimilation, model-data fusion, and artificial intelligence techniques for advancing modelling and prediction of atmospheric variables

- use of synergetic satellite observations and modelling for a better understanding of cloud processes and feedbacks

Possible Sessions:

1. Upper Atmosphere: Ionosphere, Thermosphere, Plasmasphere, Magnetosphere

2. From Ionosphere to Troposphere

3. Lower Atmosphere: Monitoring the Earth by Global Navigation Satellite Systems and other measurement systems

4. Lower Atmosphere: Water Vapour, Clouds, Precipitation and Radiation

5. Lower Atmosphere: Monitoring of anthropogenic and natural aerosols and their radiative forcing






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JG05 Geodesy for Climate Research (IAG, IAMAS, IACS, IAPSO, IAHS)

Convener(s): Annette Eicker (Germany, IAG)

Co-Convener(s): Bert Wouters (Netherlands, IACS), John T Reager (USA, IAHS), Adam Scaife (UK, IAMAS), Benoit Meyssignac (France, IAPSO)

Description
This symposium is dedicated to the use of geodetic measuring techniques for innovative climate and Earth system studies. Modern geodetic observing systems document a wide range of changes in the Earth’s solid and fluid layers at very different spatial and temporal scales related to processes as, e.g., the terrestrial and atmospheric water cycle, ocean and atmosphere dynamics, sea level, ice-mass balance, and glacial isostatic adjustment. Different time spans of observations need to be cross-compared and combined to resolve a wide spectrum of climate-related signals. Geodetic observables are also often compared with geophysical models and climate models, which helps to explain observations, test theories, evaluate simulations, and finally merge measurements and numerical models via data assimilation. We appreciate contributions utilizing data from diverse geodetic observation techniques including altimetry and gravimetry satellites, navigation satellite systems, satellite radio occultation and reflectometry, InSAR, VLBI, tide gauges, or remote sensing. We welcome studies that cover a wide variety of applications of geodetic measurements and their combination to observe and model Earth system signals in hydrological, ocean, atmospheric, climate and cryospheric sciences. Any new approaches helping to separate and interpret the variety of geophysical signals are equally appreciated. Contributions working towards any of the goals of the Inter-Commission Committee on "Geodesy for Climate Research" (ICCC) of the International Association of Geodesy (IAG) are very welcome in this symposium.



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JH04 Anthropocene: Perspectives From and Within Geophysics (IAHS, IAMAS, IACS, IASPEI, IAVCEI, IAG, IAPSO)

Convener(s): Christophe Cudennec (France, IAHS)

Co-Convener(s): Richard Essery (UK,IACS), Melita Keywood (Australia, IAMAS/iCACGP), Mark Lawrence (Germany, IAMAS/iCACGP), Domenico Giardini (Switzerland, IASPEI), Roberto Sulpizio (Italy, IAVCEI), Catia Domingues (UK, IAPSO)

Description

As the International Union of Geological Sciences considers the Anthropocene from a stratigraphic perspective, and as other communities are considering a wider definition (see the ICSU-ICS intermediate synthesis in 2016, https://www.sciencedirect.com/journal/global-environmental-change/vol/39/suppl/C) IUGG has to reconsider the concept and to renew its contribution. This session welcomes any communication in that perspective, including about great acceleration, planetary boundaries, change detection and attribution, climate change and other changes to the atmosphere-ocean-cryosphere-hydrosphere system, such as erosion-sedimentation, man-induced seismicity and man-driven geomorphology, along with related farther-reaching topics such as One Health; and assessing these issues and science-informed policy options for mitigation and adaptation together with the socio-geosciences.





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JH05 Citizen Science, Crowdsourcing and Innovative Monitoring for Advancing Geo-Sciences (IAHS, IASPEI, IAGA, IACS, IAMAS)

Convener(s): Fernando Nardi (Italy, IAHS)

Co-Convener(s): Ryan Crumley (USA, IACS), Manoj Nair (USA, IAGA), Thomas Spengler (Norway, IAMAS), Rémy Bossu (France, IASPEI)

Description
Citizen involvement in science has been transformed in the last decade by new and widely accessible data acquisition and processing tools as well as by pervasive low-cost and portable technology. Geospatial technologies and affordable equipment (smart phones, cameras, drones, etc.) allow students, researchers, and citizens to gather, analyze, visualize, and share a wealth of earth system data at different spatial and temporal scales. New opportunities are, thus, arising for addressing the uncertainties and inaccuracies of geophysical models and risk management within different fields, for a better understanding, monitoring, and forecasting of geophysical extremes. Citizen science is supporting a new paradigm for geosciences, where active citizens and crowdsourcing of data have a pivotal role for risk mitigation, communication, and awareness. This transition requires multi-disciplinary and trans-sectoral knowledge, analytical approaches, and data processing methods, spanning from earth-, geo-, hydro-, cryo- sciences to humanities as well as social and communication sciences, to synergistically define the guidelines and procedures that support effective use of human-sensed data. A key challenge in using citizen-science data is the significant noise content in the data collected by untrained users. Recent advances in Machine-Learning (ML) could allow us to build noise-filtering algorithms that can take advantage of high volumes of data created by citizen-science projects.  In this framework, the use of unintended technology along with do-it-yourself and low cost equipment is opening novel observational avenues. This joint symposium seeks contributions on data, tools, methods, and procedures that explore the role, value, and performances of citizen science and innovative sensing for earth science research.



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JH06 Education & Outreach in Geosciences (IAHS, IASPEI, IAGA, IAG, IAVCEI, IACS, IAMAS, IAPSO)

Convener(s): Christophe Cudennec (France, IAHS)

Co-Convener(s): Fabien Maussion (Austria, IACS), Markku Poutanen (Finland, IAG), Katia Pinheiro (Brasil, IAGA), Tereza Kameníková (Czech Republic, IAGA), Thomas Spengler (Norway, IAMAS), Angela Pomaro (Italy, IAPSO), Raju Sarkar (Bhutan, IASPEI), Natalia Pardo (Colombia, IAVCEI)

Description
Sharing scientific knowledge and methods through education and outreach is of high importance to support the societal transition in terms of sustainability, development, and security. Initial and life-long education, training in operational services, and capacity development within institutions and society are facing many challenges, when dealing with environmental and societal changes, disaster risk reduction, and the evolution of techniques along the data – information – knowledge – decision support chain. This symposium welcomes conceptual developments as well as practical study cases from geoscientists, as well as from didacticians and knowledge brokers. The variety of approaches across disciplines and across the diversity of the geosciences will provide a collective overview on education and outreach activities the basics and variants in our fields. The symposium also encourages sharing of lessons learned from the enhanced digitization induced by the pandemic and from the ongoing digital revolution, showcasing perspectives of the knowledge society and the Open Science paradigm.



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JM01 Recent Advances in Regional Climate Modelling (IAMAS, IACS, IAHS)

Convener(s): Tomas Halenka (Czech Republic, IAMAS)

Co-Convener(s): Sven Kotlarski (Switzerland, IACS), Erika Coppola (Italy, IAHS)

Description
Regional climate models (RCMs) are important tools which can be used not only for dynamical downscaling of global climate models (GCMs) but for the analysis of a broad spectrum of problems, e.g. in land surface interaction, cloud processes, atmospheric chemistry and many other purposes. These also include hydrological and cryospheric applications, acknowledging the fact that due to their interactive role in the climate system sophisticated representations of the terrestrial hydrology and the terrestrial cryosphere are incorporated in today's state-of-the-art climate models. A recent trend in RCM development concerns the increase of the spatial resolution, shifting from a few tens towards just a few kilometers. This so-called convection-permitting mode enables the explicit representation of small scale features such as convective precipitation extremes or specific climate features in complex topography. However, this approach is very demanding in terms of computational resources, which requires specific developments in IT and high-performance computing. These challenges already lead to broader cooperations between modelling groups (e.g., CORDEX). These collaborations, in turn, are able to provide larger ensembles for certain regions of interest with a decent coverage of projection uncertainty. In general, high-resolution simulations from RCMs can significantly improve the applicability for climate change impacts assessment - including impacts on the terrestrial hydrology and cryosphere - and for further climate services and the development of adaptation strategies. Contributions addressing all these above mentioned aspects as well as broader regional climate modelling science are welcome to be submitted for this session.



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JM02 Tropical-Polar Interactions, Arctic Amplification and Its Influence on Midlatitude Weather (IAMAS, IACS, IAPSO)

Convener(s): Xichen Li (China, IAMAS)

Co-Convener(s): Anais Orsi (Canada, IACS), Lee Welhouse (USA, IAMAS), Sheeba Nettukandy Chenoli (Malaysia, IAMAS), Jonathan Wille (USA, IAMAS), Matthew England (Australia, IAPSO)

Description
The Earth’s tropical and polar regions are not isolated climate systems and are in a constant cycle of feedback regarding heat, moisture, and momentum exchanges. The interactions between polar regions and lower latitudes play a crucial role in the earth climate system. On the other hand, Arctic and Antarctic experienced dramatic climate changes in recent decades. The surface temperature trend over the Arctic is more than twice as fast as the global warming rate, associated with a rapid Arctic sea-ice retreat, which is known as the Arctic Amplification. Rapid Arctic changes contribute to a series of climate changes in mid-latitudes. This symposium invites discussions on the rapid climate changes over the Arctic and Antarctic regions and their impacts on lower latitudes, as well as the teleconnections between tropics/mid-latitudes and the polar regions and resulting impacts on the polar atmosphere-ocean-sea ice system. An understanding of tropospheric and stratospheric pathways of the tropical-polar interaction is essential for both short-term and seasonal forecasting along with calibrating future climate change projections. The Arctic amplification has broad implications on the cold winter over the Eurasian continent and extreme weather events over the Northern Hemisphere during both winter and summer. These will be the main focus of this symposium. Topics of discussion welcomed in this symposium include any studies that connect the lower latitudes and the higher latitudes such as empirical and modelling approaches to Rossby wave and jet stream dynamics, stratosphere-troposphere coupling, meridional moisture transport, ocean-atmospheric linkages, and how these processes impact the earth climate system in the past, present, and future. If a butterfly flaps its wings in the tropics or polar regions, can we model its impacts in the Arctic and Antarctic or lower latitudes?



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JM03 Polar Regions Instrumentation (IAMAS, IACS, IASPEI)

Convener(s): Tracy Moffat-Griffin (United Kingdom, IAMAS)

Co-Convener(s): Alexis Berne (Switzerland, IACS), Matthew Lazzara (USA, IAMAS), Adam T. Ringler (USA, IASPEI)

Description
There are many ways to study and characterize the atmosphere, from the use of ground-based instrumentation and balloons to satellite observations. This symposium welcomes submissions that cover different atmospheric instrument approaches to studying the depth of the polar atmosphere: the surface, the troposphere and beyond. New atmospheric instrumentation and their results, new analysis techniques or planned projects/observational research campaigns will be highlighted. Observational studies that feature polar instrumentation applications are also encouraged in this symposium.



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JM04 Weather and Climate Extremes: Understanding, Modeling, Prediction, and Impacts (IAMAS, IAHS)

Convener(s): Julie Mireille Thériault (Canada, IAMAS), Jiwen Fan (USA, IAMAS)

Co-Convener(s): Corinna Hoose (Germany, IAMAS), Hongyi Li (USA, IAHS), Abhishekh K Srivastava (USA, IAMAS), Christopher White (UK, IAHS), Brian Golding (UK, IAMAS)

Description
Weather and climate extremes have been increasing in both frequency and magnitude, imposing significant impacts on society. These include, but are not limited to, heavy rain and rain-on-snow events leading to major flooding events, occurrence of hail damaging crops and infrastructure, heavy wet snow and freezing precipitation causing major power outages and transportation interruptions, excessive heat causing major loss of life. Physical factors affecting extreme event intensity and frequency are particularly complicated by human-natural system interactions. A better understanding of extreme events, especially compound events, and their impacts requires interdisciplinary research, and this session aims to foster cross-discipline discussion and collaboration on this topic. We solicit studies that utilize various tools such as observations, analysis, and modelling, integration with machine learning and artificial intelligence at various scales from the fields of atmospheric and climate sciences, land- and marine-atmosphere interactions, and hydrology to improve (a) understanding of contributing factors, (b) prediction of extremes at various time scales, (c) models across scales, and (d) impacts on society. Work on human-natural interactions (such as interactions with urbanization, greenhouse gases and aerosols and including vulnerability and risk assessment), sub-seasonal and seasonal prediction, and convection-permitting Earth system modeling are particularly welcome. Contributions relevant to the World Weather Research Programme project on High-impact Weather (HIWeather) and to the World Climate Research Programme Grand Challenge on Climate and Weather Extremes including cross-cutting themes are especially encouraged.



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JM05 Earth System Models: Assessing the Earth System’s State and Fate From Regional to Planetary Scales (IAMAS, IAHS, IACS, IAPSO, IAVCEI?)

Convener(s): François Massonnet (Belgium, IAMAS)

Co-Convener(s): Sophie Nowicki (USA, IACS), Richard Petrone (Canada, IAHS), Anna von der Heydt (Netherlands, IAPSO)

Description
Earth System Models (ESMs) have become a cornerstone in geosciences, being used for process understanding, detection and attribution of climate signals, prediction from sub-seasonal to millennial time scales, regional downscaling, and impact analyses. Each generation of ESMs presents refinements compared to the previous one: from one cycle of model development to the next, spatial resolution increases, more components of the Earth system are included, and new processes become explicitly represented. Also, observations and data-driven approaches are increasingly used within ESMs to better predict high-impact events. This symposium encourages contributions dealing with the many facets of Earth System Model development, evaluation, and application, including but not limited to: modeling results from the Coupled Model Intercomparison Project Phase 6, development and assessment of models making use of recent Earth observations from ground- and space-based measurements, prediction of climate on seasonal to centennial timescales, climate change detection and attribution, regional-scale climate modeling and process analysis, high-resolution climate modeling, and subgrid scale parameterization development including statistical and machine learning techniques. Submissions on the latest advances in coupled aspects of the Earth system are particularly encouraged.



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JP05 Tsunamis (IAPSO, IASPEI, IAVCEI, IAMAS, IAG)

Convener(s): Yuichiro Tanioka (Japan, IASPEI)

Co-Convener(s): Maitane Olabarrieta (USA, IAMAS), Diana Greenslade (Australia, IAPSO), Maria Ana Baptista (Portugal, IAPSO), Alexander Rabinovich (Russia, IASPEI), Mohammad Herdarzadeh (UK, IASPEI), Yuichi Nishimura (Japan, IAVCEI)

Description
Tsunamis are one of the most devastating natural disasters, with the potential to cause tremendous damage along coastlines around the world. Catastrophic tsunami events of this century, such as the 2004 Indian Ocean and 2011 Tohoku tsunamis, have demonstrated the increasing risk of disasters for coastal population and infrastructure. As a response to these deadly tsunamis, many new tsunami forecast and warning capabilities have been developed and implemented. The 2018 Sulawesi and Krakatau tsunamis have demonstrated that tsunamis caused by mechanisms other than great earthquakes must also be considered. The more recent 2022 large volcanic eruption in Tonga generated air-sea coupled wave causing damage along the coast around the Pacific. Sea-level rise caused by global warning also presents new challenges for tsunami science. The IUGG symposium will discuss all aspects of tsunami science including: theoretical and numerical research on tsunami generation and inundation; development of forecast and warning methods; investigation of geologic records of past events; response, mitigation, and recovery strategies; observational studies, including collation of historical observations; and hazard and risk studies from tsunamis generated by earthquakes, landslides, volcanic eruptions. The symposium will also include a special session on meteo-tsunamis, including the air-sea coupled wave due to the 2022 Tonga eruption, in association with IAMAS.



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JV02 Dispersal of Volcanic Particulates in the Atmosphere and the Oceans (IAVCEI, IAMAS, IAPSO)

Convener(s): Silvia Massaro (Italy, IAVCEI)

Co-Convener(s): Markku T. Kulmala (Finland, IAMAS), Nadia Lo Bue (Italy, IAPSO)

Description
Among the variety of volcanic processes, explosive eruptions are of particular interest for the scientific community, in the light of mitigating their impact on human lives and activities. In fact, the eruption columns formed during these episodes may represent a great hazard for our society. On the ground, livelihoods and infrastructures can be extensively damaged by the fall of pyroclasts of various sizes and shapes. In the air, volcanic clouds pose a serious threat to aviation safety with immediate and long-term effects on aircraft functionalities. In the oceans, volcanic particles may induce both pollution and fertilization, influencing the biology and chemistry of the water. Volcanic hazard assessment is therefore a fundamental step in the evaluation of the risk associated with the presence of ash particles into the atmosphere and the fall of tephra on the ground. In this session we welcome contributions combining numerical modelling, field observation and monitoring of volcanic ash clouds, supporting the assessment of their hazard.



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JV03 Hunga Tonga (IAVCEI, IAMAS, IASPEI, IAGA, IAG)

Convener(s): Roberto Sulpizio (Italy, IAVCEI)

Co-Convener(s): Ronan Le Bras (Austria, IASPEI)

Description
The cataclysmic January 15 eruption of Hunga Tonga Hunga Ha’apai presents a rare opportunity for researchers to explore new problems in volcanology, petrology and geochemistry, seismology, tsunamigenesis, infrasonics, and atmospheric science.



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