SEARCHING: IAGA



A01 New Frontiers in Rock and Environmental Magnetism

Convener(s): Aldo Winkler (Italy)

Co-Convener(s): Andrea Biedermann (Switzerland) Juan Cruz Larrasoaña Gorosquieta (Spain)

Description
Rock and environmental magnetism have developed considerably over the last years, both from a theoretical, experimental and methodological point of view and for their wide range of multidisciplinary applications, connecting the geosciences to physics, chemistry, biology and environmental science, and even cultural heritage and archeological investigations. This session welcomes contributions on the numerous applications of rock and environmental magnetism, including but not limited to, climate change, anthropogenic pollution, iron biomineralization, and depositional and diagenetic processes in sediments. In particular, we encourage studies that focus on the multidisciplinary advancement of measurement and interpretation techniques. This session provides a platform to foster and deepen collaboration between rock and environmental magnetism and any researcher involved in the study of the sources and the impact of multi-scale natural and anthropogenic environmental processes.



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A02 Electrodynamics and Energetics of the Middle Atmosphere

Convener(s): Martin Füllekrug (UK)

Co-Convener(s): Earle Williams (USA) Colin Price (Israel) Gaopeng Lu (China) Mitsuteru Sato (Japan)

Description
This symposium explores ground and space-based measurements and the corresponding theory and simulations which enable studies of the impact of thunderstorms and lightning on the Earth’s middle atmosphere and their relation to global climate change. The session solicits contributions which advance knowledge in all of the above areas as part of the global atmospheric electric circuit, including thunderstorm quasi-static electric fields, lightning discharges and their electromagnetic radiation in all frequency ranges, transient luminous events, energetic charged particles, and their impact on the Earth's middle atmosphere and near-Earth space. Interdisciplinary studies which emphasize the connection between atmospheric layers, their electrodynamics and climate change are particularly welcome.



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A03 Coupling Processes in the Atmosphere-Ionosphere System

Convener(s): Christina Arras (Germany)

Co-Convener(s): Petra Koucká Knížová (Czech Republic) Subramanian Gurubaran (India) Loren Chang (Taiwan, Province of China) Igo Paulino (Brazil) Erdal Yigit (USA)

Description
The objective of this symposium is to bring new insights into the understanding of the coupling processes in the atmosphere-ionosphere system. The symposium will address fundamental physical, chemical, and electrodynamical processes covering whole atmosphere system. The coupled effects can be expressed in terms of the modulation of waves from the lower to the upper atmosphere as well as from low- to high latitudes, electrodynamic and compositional changes, plasma drifts, electric fields and plasma irregularities at different latitudinal regions of the globe due to the varying energy inputs. The manner in which the couplings take place due to varying energy inputs from the Sun and from the lower atmosphere is a question that is not completely understood. This symposium solicits papers dealing with experiments, observations, modelling and data analyses that describe the effects of atmospheric coupling processes within the whole atmosphere-ionosphere system. The symposium is proposed by IAGA WG II-C Meteorological effects on the ionosphere in cooperation with the Scientific Committee on Solar Terrestrial Physics (SCOSTEP) along with its PRESTO science program and the Interdivisional Commission on Developing Countries (ICDC).



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A04 Advances in Mid-Latitude, Low-Latitude and Equatorial Aeronomy

Convener(s): Michael Pezzopane (Italy)

Co-Convener(s): Venkatesh Kavutarapu (India) Paulo Roberto Fagundes (Brazil) Alessio Pignalberi (Italy)

Description
Papers are invited for a symposium on the recent advances in the field of mid-latitude, low-latitude and equatorial aeronomy from observational (ground-based and space-borne), theoretical and simulation studies. The occurrence of equatorial Spread-F, plasma bubbles, equatorial ionization anomaly (EIA), equatorial electrojet (EEJ), ionospheric disturbances induced by SSWs, and multiple F-layer stratifications present a strong daily, day-to-day, and seasonal variability, mainly caused by the ionospheric electrodynamics, thermospheric winds and wave actions (gravity waves, tides, planetary waves, TIDs and MSTIDs). Recent multi-instrument and multi-site observations, various satellite borne experiments, as well as, theoretical and simulation investigations have advanced our understanding of these phenomena, during both quiet and disturbed periods including geomagnetic storms, sub-storms, solar flares, solar eclipses, sudden stratospheric warmings and different meteorological events. The objective of this symposium is to bring together the experimentalists and theoreticians to survey the latest results, examine new ideas and concepts, and to pave the way for future directions in equatorial and low-latitude research. The session will include both solicited and contributed (oral and poster) papers.



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A05 Space Weather and Electrodynamics of the Ionosphere and Atmosphere into the Polar Regions

Convener(s): Eugene Rozanov (Switzerland)

Co-Convener(s): Tamas Bozoki (Hungary) Irina Mironova (Russia) Earle Williams (USA)

Description
The Polar ionosphere-atmosphere system as well as the electrodynamics of the global electrical circuit depends on solar wind magnetosphere interactions. The symposium solicits contributions to interdisciplinary studies that emphasize the connection between the ionosphere-atmosphere system and the magnetosphere, as well as the coupling between atmospheric layers, ionospheric potential, electrical currents, lightning physics, energetic radiation, energetic particles, and their impact on the Earth's atmosphere, ionosphere and the magnetosphere. In particular, we welcome reports on the impact of energetic particle precipitation on the Earth's ionosphere and atmosphere, their atmospheric and climate effects, the formation of electrical currents and changes in conductivity. This symposium is focused on both satellite and ground-based observations, as well as modelling studies of electrodynamics of the ionosphere-atmosphere system and its coupling to the space environment. The symposium also invites contributions from the SCOSTEP/PRESTO program (Pillar 2: Space Weather and Earth’s Atmosphere and Pillar 3: Solar Activity and its Influence On Climate).



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A06 Energetic Particle Precipitation Impacts on the Ionosphere, Upper Atmosphere, and Climate System

Convener(s): Mark Clilverd (UK)

Co-Convener(s): Craig Rodger (New Zealand) Pekka Verronen (Finland)

Description
This symposium is targeted at both satellite and ground-based and experimental observations, as well as theoretical investigations, into the precipitation of energetic particles into the D-region ionosphere and below - along with the impact of the energetic precipitation on the upper atmosphere and the coupling of these impacts on the climate system. Particle precipitation into the atmosphere is one of the mechanisms for energetic electron loss from the Van Allen radiation belts. This is particularly significant during and after geomagnetic storms, when the loss rate, and the source population, can both increase. Submissions describing other examples of energetic particle precipitation affecting the mesosphere and stratosphere, for example solar proton events or hard-spectrum substorm precipitation, are also relevant for this symposium. Papers considering the precipitation drivers, the nature of the particle fluxes, the impact of the precipitation on the ionosphere or atmosphere, and the climate system response are welcome. Results from the SPARC’s SOLARIS-HEPPA community, as well SCOSTEP's PRESTO programme are solicited.



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A07 Radiation Belt and Ring Current: Emergence and Loss in Geospace, and the Role of the Cold Plasma Background

Convener(s): Drew Turner (USA)

Co-Convener(s): Ioannis Daglis (Greece) Jacob Bortnik (USA) Yoshizumi Miyoshi (Japan) Balazs Heilig (Hungary)

Description
Relativistic electrons in geospace form the Van Allen radiation belts and are a major space weather agent, as they pose a significant threat to space assets. Their emergence and loss are driven, to a large extent, by magnetospheric plasma waves of various frequencies. These processes are mediated by the cold plasma density through wave-particle interactions over a large scale of spatial extent. Loss of relativistic electrons occurs through the magnetopause to interplanetary space and through precipitation to the Earth’s atmosphere. Precipitating relativistic electrons have a significant impact on the dynamics of the upper atmosphere which can cause catalytic destruction of mesospheric ozone and feed back into space affecting the convection electric field. This session invites studies of the emergence, loss, precipitation and atmospheric impacts of relativistic electrons in geospace, as well as  the dynamic behaviour of the plasmasphere and the radiation belt using in-situ and ground based observations, physics-based models, machine learning and/or numerical simulations.



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A08 DIV III Reporter Review

Convener(s): Simon Wing (USA)

Co-Convener(s): George Balasis (Greece)

Description
Contributions to this session are by invitation only. This session presents reviews of the scientific progress in the Div III in the last few years.



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A09 Magnetosphere-Ionosphere-Thermosphere Coupling during Enhanced Geomagnetic Activity

Convener(s): Toshi Nishimura (USA)

Co-Convener(s): Yaqi Jin (Norway) Simon Wing (USA)

Description
Determining the effects of energy deposition and transport, and momentum exchange across regions and different spatial and temporal scales during disturbed times such as storms and substorms is an important objective in the M-I-T system. Coupling across multiple scales is also a critical challenge since observational and modeling methodologies for bridging different scales do not presently exist. This session solicits presentations on a wide range of coupling processes in the M-I-T system from global to local processes. Relevant topics include (but are not limited to) (1) density structures and temperature gradients (polar cap patch, cusp, plume, trough, irregularities); (2) convection (fast flows, SAPS, penetration electric field) and currents; (3) energy transfer and deposition by precipitation, conductivity, aurora, and heating; (4) ion-neutral interaction (thermospheric density and wind) and (5) coupling and feedback into the magnetosphere (including waves and instabilities). Discussions by all means of observations, modeling and data science are encouraged.



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A10 The Expanding Regimes of ULF Wave Research

Convener(s): Jayashree Bulusu (India)

Co-Convener(s): Kazue Takahashi (USA) Masahito Nosé (Japan)

Description
ULF wave research has a long-standing history and equally significant on-going efforts in explaining some of the fundamental problems of magnetospheric research viz: energy transport during dynamic coupling of solar wind-magnetosphere, wave particle interaction, flux rope disruptions during active geomagnetic conditions. The research has a far-reaching implication in magnetoseismology using field line resonances and extends to higher frequencies covering the IAR (Ionospheric Alfven resonator) and ELF bands in probing the lowest ionospheric layers. This ULF session focuses on the advancement in the understanding of ULF wave propagation and transport of energy in the geospace and other planetary environments, as well as in the use of ULF waves to probe the magnetosphere, such as in magnetoseismology. Papers are invited from observations of ULF waves with satellites and ground-based experiments depicting transmission of energy from the solar wind, internal ULF instabilities, magnetosphere-ionosphere coupling, field line resonances, investigations of IAR and SR (Schumann Resonances) and their relation to ULF waves. Papers depicting the developments in analytic, numerical, and machine learning techniques are also encouraged.



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A11 Magnetotail Dynamic Processes

Convener(s): Jay Johnson (USA)

Co-Convener(s): Chih-Ping Wang (USA)

Description
Decades of space explorations have shown that plasma and energy transport processes in the magnetotails of Earth and other planets play a critical role in the dynamics of their magnetospheres. These processes occur over a diverse range of spatial and temporal scales, involving steady and/or intermittent mass loading, momentum, and energy transport often culminating in explosive events that completely reorganize the plasma sheet and drive processes in the inner magnetosphere, ionosphere, and boundary layer. Multipoint observations within the boundary layers, the plasma sheet and the ionosphere have been key to developing a more comprehensive view of the role of various transport processes. However, many unsolved questions remain about the underlying transport mechanisms and their coupling to the inner magnetosphere and ionosphere, which can only be resolved using multiple approaches that include theory, simulation, and observation. This session provides a forum to present the latest results on magnetotail processes at Earth and other planets.



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A12 Magnetospheric Processes

Convener(s): Simon Wing (USA)

Co-Convener(s): George Balasis (Greece)

Description
The magnetosphere is the outermost layer of the atmosphere where the primary physical processes involve plasma, waves, electric currents, electric and magnetic fields. At its outer boundary, the magnetosphere interacts with the solar wind, forming a bow shock and magnetopause boundary. Electric currents flow within the magnetosphere and between magnetosphere and ionosphere, providing a fundamental link for the magnetosphere-ionosphere coupling. Mass and energy are transported between the solar wind and magnetosphere and between magnetosphere and ionosphere. This session welcomes contributions that highlight processes within the magnetosphere, solar wind-magnetosphere interactions, and magnetosphere-ionosphere interactions. Studies that involve satellite and ground observations, modeling and simulations, theory, and laboratory experiments are welcomed.



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A13 Magnetospheric Boundary Layers

Convener(s): Xuanye Ma (USA)

Co-Convener(s): Andrew Dimmock (Sweden) Kareem Sorathia (USA) Ya-Hui Yang (Taiwan, Province of China)

Description
Planetary magnetospheres have long been known to be spatially bounded by the fast solar wind, such that plasmas and fields observed inward of the boundary (magnetopause) are distinct from plasmas and fields outside the boundary.  Additional examples of boundaries in typical magnetospheres include but are not limited to the outer edge of the magnetotail plasma sheet, the upstream bow shock, and the plasmapause. These boundaries of finite thickness not only spatially separate different regions but also have a profound impact on their neighboring regions, which are rich environments for study since they contain an array of multi-scale processes. Examples include magnetic reconnection, waves, instabilities, and non-linear structures, which can be coupled across electron-ion-fluid scales.  Recent spacecraft missions and ground-based observatories have made it possible to make observations from multiple vantage points, at varying spatial scales, and at high temporal resolution. This has enabled important new insights into the fundamental physical processes associated with boundary layers under different solar wind conditions and different types of magnetospheres. In this session we focus on recent advances in the understanding of magnetospheric boundary layers. We encourage contributions from data analysis studies, first-principles and empirical modeling, machine learning, and theory that address the physics of magnetospheric boundary layers and their influence on magnetospheric dynamics.



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A14 Dayside Magnetosphere Interactions

Convener(s): Hui Zhang (USA)

Co-Convener(s): Bertrand Lembege (France) Qiugang Zong (China)

Description
The Earth’s magnetosphere is significantly affected by transient solar wind features. During the interaction between the solar wind transients and the Geospace system, important energy transfer and transport occur. Solar energy in various forms can propagate into the magnetosphere and ionosphere. In the meanwhile, charged particle energy can be transformed to electromagnetic energy, and vice versa. In-depth understanding of how the magnetosphere responds to transient solar wind features will enhance our knowledge on the solar wind-magnetosphere-ionosphere coupling. This special session will address the processes by which solar wind mass, momentum, and energy enter the magnetosphere. Regions of interest include the foreshock, bow shock, magnetosheath, magnetopause, cusps, the dayside magnetosphere, and the dayside ionosphere. This special session will provide a forum for the latest results from in-situ spacecraft observations, ground-based observations, and simulations. Coordinated multi-point observations are especially encouraged. Planetary dayside magnetospheric interaction studies are also welcome.



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A15 Advances and Upcoming Developments in Solar and Heliospheric Physics

Convener(s): Mari Paz Miralles (USA)

Co-Convener(s): Noé Lugaz (USA) Spiros Patsourakos (Greece) Jin-Yi Lee (Republic of Korea) Xochitl Blanco-Cano (Mexico) John Richardson (USA) Cnythia Lopez Portela (Mexico)

Description
Continuous observations have advanced our knowledge of the physical and dynamical properties of the Sun, the heliosphere, and the interstellar medium. These observations, along with theory and models, continue to pose challenges to our understanding of the relevant physical processes. This session invites contributions covering new results from space- and ground-based observations, theory, and modeling of different aspects of the Sun and the heliosphere, including the solar interior, magnetic field, atmosphere, solar wind, and interstellar medium. This session will stimulate exchange and promote discussion of upcoming developments from the latest research and instrumentation in the field. In addition, we also invite contributions from the SCOSTEP/PRESTO program (Pillar 1: Sun, interplanetary space, and geospace).



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A16 Waves and Turbulence in the Solar Corona and Wind

Convener(s): Luca Franci (UK)

Co-Convener(s): Emauele Papini (Italy) Francesco Valentini (Italy) Sergio Servidio (Italy) William Matthaeus (USA)

Description
Turbulence is ubiquitous in space and astrophysical plasmas and it is a fundamental ingredient in their dynamics. It is directly responsible for transferring energy from macroscopic fluid scales down to sub-electron scales and it also plays a role in particle heating and acceleration and in energy dissipation, all processes of great interest for the astrophysical community. Plasma environments that are directly accessible to spacecraft such as the solar wind, and more recently the solar corona, represent unique natural laboratories to probe the plasma dynamics. In situ spacecraft observations, combined with theoretical models and numerical simulations, are key to advancing our understanding of the different phenomena at play. This session will focus on current research on plasma turbulence in the solar corona and the solar wind. It will address its properties and evolution, its interaction with magnetic reconnection, instabilities, wave-particle interactions, and the solar wind expansion, and its role in the particle dynamics and in energy dissipation. We welcome diverse and complementary contributions from theory, simulations, and observations which focus on different aspects (e.g., spectral properties, cross-scale energy transfer, intermittency, and all related mechanisms).



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A17 Interplanetary Shocks, Particle Acceleration, and Transport in Solar and Heliospheric Physics

Convener(s): Manolis Georgoulis (Greece)

Co-Convener(s): Alexis Roulliard (France) Camilla Scolini (USA ) Robert Wimmer-Schweingruber (Germany) Alessandro Bemporad (Italy)

Description
Collisionless shock waves produced by coronal mass ejections and corotating interaction regions are known to accelerate solar energetic particles (SEPs). The enhancements in energetic particle fluxes at Earth can pose a hazard to humans and technology in space and at high altitudes. The mechanisms that accelerate particles in shock waves are still debated and include, for instance, shock-drift, diffusive shock, and betatron acceleration. The shock geometry and strength and the presence of pre-energized seed particle populations are also thought to significantly affect the capacity of shock waves to accelerate particles. The advent of Solar Orbiter and Parker Solar Probe has opened a new era in this branch of high-energy solar physics by allowing detailed measurements of SEPs closer to the Sun, thereby alleviating some challenges by allowing more in-depth studies of the relative effects of acceleration and transport processes on SEP events. This session addresses the acceleration and transport of energetic particles at shock waves by inviting research contributions focused on the analysis of particles measurements in the inner heliosphere by the current fleet of operating spacecraft as well as through theoretical studies including numerical simulations.



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A18 Space Weather and Space Climate: Data and Models 

Convener(s): Laure Lefevre (Belgium)

Co-Convener(s): Suiyan Fu (China) Ian Mann (Canada)

Description
With the growing human technology and space exploration, understanding and modeling of space weather and climate driven by solar activity is becoming exceedingly important. Accordingly, the amount of scientific data from numerous missions in the heliosphere is growing rapidly, as is the number and variety of models. This large amount of data evokes novel, data-driven models. In order to use these novel methods, a rigorous examination of the available data, applied techniques, and statistical properties of the system is necessary. We solicit contributions related to recent progress in handling data sources, data quality issues, forecasting techniques and modeling of space weather and space climate. Especially, but not exclusively, we encourage contributions describing novel approaches based on data assimilation techniques and machine learning. Contributions regarding data collection, data formats, metadata standards, distribution interfaces, and any issues associated with these are also encouraged. 



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A19 Solar Eruptions (CMEs, Flares, Filaments), Their Source Region Evolution, and Forecast

Convener(s): Bernhard Kliem (Germany)

Co-Convener(s): Lucie M. Green (UK) Jie Zhang (USA) Manolis Georgoulis (Greece)

Description
The physical processes in solar eruptions -- filament/prominence eruptions, coronal mass ejections (CMEs), and flares -- continue to be debated, despite expanding observational capabilities from space (SDO, SolO) and the ground (e.g., NVST, DKIST), ever increasing complexity and realism of their numerical modeling, and progress in analytical treatments. Magnetohydrodynamic instabilities and magnetic reconnection are at work, but their interplay and relative importance remain elusive. The topology of the source-region field, which rules these processes, is difficult to infer. Opposing processes in active-region evolution at the photospheric level, like flux emergence and cancellation, are both capable of driving the coronal field up to the onset of eruption, and it remains unclear which of them is most relevant for the strongest eruptions. Of particular relevance for forecasts is the question at which evolutionary stage of emerging regions major eruptions begin to occur. Shear and rotational motions increase the complexity. Understanding these relationships and the onset conditions will help advancing phenomenological eruption forecasts to so-called physics-based ones. The session invites contributions on these and related aspects of solar eruptions, including observations and modeling.

It is anticipated that the symposium will be structured around the following themes:
1) Mechanisms of Eruptions
2) Source-region Evolution (incl. Flux Emergence and Cancellation)
3) Eruptions from High Altitudes and Stealth Events
4) Progress Toward Physics-based Forecast of Eruptions.

Solicited speakers: Tibor Török (Predictive Science, Inc., USA), Jiong Qiu (Montana State University, USA), Shin Toriumi (JAXA/ISAS, Japan), Alphonse Sterling (NASA/MSFC, USA), Nathalia Alzate (NASA/GSFC, USA), Benjamin Lynch (University of California, Berkely, USA), Ioannis Kontogiannis (Astrophysical Institute Potsdam, Germany), Gherardo Valori (Max Planck Institute for Solar System Research, Germany)

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A20 The Rising Phase of Solar Cycle 25 and Comparisons to Previous Cycles

Convener(s): Nishu Karna (USA)

Co-Convener(s): Lisa Upton (USA) Frederic Clette (Belgium) Duncan Mackay (UK)

Description
The eleven-year solar cycle is driven by the periodic evolution of the solar magnetic field, a dynamo process involving the transformation of the Sun’s poloidal magnetic field into a toroidal active region belt and back again from the toroidal bands to a new poloidal field of the opposite polarity. This cyclic variation has been observed for centuries by changes of activity markers at the solar surface, but this variability is also present in the Sun’s interior, throughout the interplanetary medium, and in the response of the Earth’s magnetosphere and atmosphere. In this session, we solicit contributions on aspects of solar, heliospheric, and geospace phenomena that are modulated by the solar cycle. This includes, but is not limited to solar flows; sunspots and active regions; filaments and prominences; coronal cavities, streamers, and holes; the solar wind; solar irradiance; and the Earth’s magnetosphere, ionosphere, and thermosphere. We look forward to getting a comprehensive overview of the ongoing rise to the solar cycle 25 maximum, and investigating the similarities and differences with previous solar cycles, in order to improve our predictions of the rest of the current cycle, and possibly, of the cycles that will follow.



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A21 Satellite-Based Geomagnetic Field Measurements and Modeling

Convener(s): Gauthier Hulot (France)

Co-Convener(s): Patrick Alken (USA)

Description
Geomagnetic field measurements from space have played a crucial role in enhancing our understanding of our planet's magnetic field and its interaction with the solar wind for the past two decades. Space-based measurements provide global coverage at all longitudes and local times, allowing the separation of magnetic signals originating in the core, lithosphere, ionosphere, and magnetosphere. This session invites presentations on upcoming satellite missions designed for geomagnetic observations, as well as the use of existing and future satellite datasets to advance our capabilities for modeling all sources of the geomagnetic field.



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A22 Planetary Magnetic Fields and Secular Variation at All Temporal Scales

Convener(s): William Brown (UK)

Co-Convener(s): Hannah Rogers (UK) Courtney Sprain (USA)

Description
Magnetic fields are a key characteristic of Earth and many other planetary bodies. Their study can provide insight into a planetary body’s workings, from core to space. Magnetic fields vary across a wide range of temporal and spatial scales, and the secular variations generated by dynamo processes are windows to the past, present, and future state of these bodies. This session covers observations, simulations, and theory of planetary magnetic fields, with particular focus on all timescales of paleo-, archeo-, and geo-magnetic secular variations.

Solicited speaker: Shivangi Sharan (Nantes Université, France)

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A23 Current Developments of Ground Geomagnetic Observations and Integration With Space Based Data

Convener(s): Katia Pinheiro (Brazil)

Co-Convener(s): Seiki Asari (Japan) Vincent Lesur (France)

Description
Ground geomagnetic observations play a crucial role in generating high quality and consistent long term data sets. On the other hand, satellites produce high quality data with global coverage. The combination of ground and satellite data open new possibilities for studying space weather, space physics, magnetosphere-ionosphere coupling, secular variation, and for geomagnetic field modelling. This session aims to bring together the most recent results from experimental and theoretical improvements in data acquisition and their application. We invite contributions on all aspects of advances in developing new techniques for operating ground observatory, magnetometer station and satellites, as well as application of their data. These include the techniques for measurement, instrumentation, data processing, modelling, and any other applications in a global or regional context.



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A24 Geomagnetic Observations, Indices and Products for Space Science, Space Weather and Space Climate Applications

Convener(s): Anna Willer (Denmark)

Co-Convener(s): Jürgen Matzka (Germany) Tanja Petersen (New Zealand) Phani Chandrasekhar (India)

Description
Space weather describes the changing conditions in the near-Earth space environment. The increasing awareness of how space weather events can affect our technological systems, environment, human life and health, has increased the need for scientific investigations and space weather product developments. Magnetic field measurements obtained on Earth, in Low Earth Orbit and further out in space, provide us with crucial data for post priory analysis, and enable us to develop predictions and to monitor the geomagnetic condition in near real time. This session presents geomagnetic observations, indices and products specific to space science, space weather and space climate applications.



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A25 Geoelectric Field Measurements and Modeling for Space Weather Applications

Convener(s): Juliane Huebert (Germany)

Co-Convener(s): Ciaran Beggan (UK) Ikuko Fujii (Japan) Joana Ribeiro (Portugal)

Description
Understanding the spatial and temporal variation of geoelectric fields on a regional level is vital, for example, in computing and forecasting geomagnetically induced current effects from space weather activity. Long term measurements have been ongoing for decades to over a century in some countries while more recently many short term magnetotelluric campaigns have produced information on the local response to magnetic field change. In this session, we seek contributions from historic records of the geoelectric field and modern measurements, as well as their use in 1D and 3D modelling of the geoelectric field during magnetically active periods. We seek to bring together data and models to achieve a better understanding of how the geoelectric field varies spatially and temporally in all space weather conditions.



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JOINT



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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JA03 Analogue Data for the Future: Preservation and Present-Day Utilization of Historical Data in the Geosciences (IAGA, IACS, IASPEI, IAHS, IAG, IAPSO)

Convener(s): Ciarán Beggan (UK, IAGA)

Co-Convener(s): Lauren Vargo (New Zealand, IACS), Kirsten Elger (Germany, IAG), Hisashi Hayakawa (Japan/UK, IAGA), Alberto Viglione (Italy, IAHS), Satheesh S.C. Shenoi (India, IAPSO), Josep Batlló Ortiz (Spain, IASPEI), Kristine Harper (Denmark, IAMAS), Roberto Carniel (Italy, IAVCEI)

Description
In many areas of geophysical and geological studies, long running measurements at a fixed location or over a wider region exist in analogue (physical) form including, amongst others, on photographic paper, in journals or as published tables. It is highly advantageous to convert analogue records to digital values, allowing modern computational techniques and analysis to be applied. However, it is often challenging to convert analogue records as formatting, the type of information recorded, accompanying metadata, and unit metrics change over time. Campaigns to digitize temperature or climate-related measurements have been very successful, especially with the recruitment of keen citizen scientists. However, more scientific formats, such as graphs with technical information or notation, are less amenable to generalist help. Historic analogue records frequently offer significant scientific implications, forming a baseline for analyses of long-term variability and/or short-term extreme hazards in multiple scientific aspects. In this context, it is important to compare these analogue records with one another and document their individual instrumental details for cross-calibrations. This session looks at methods for preservation, extraction, and analysis of historic analogue records, including by manual, image processing or machine learning techniques. This session also accommodates documentation of instrument detail and calibration methods for historical observations. This session welcomes new analyses using data that have previously been in analogue form, and case studies of long-term geophysical variability or individual short-term extreme events. We seek submissions from across all associations.



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JA04 Marine Geodesy and Geophysics – Opportunities & Hazards (IAGA, IAG, IASPEI, IAVCEI)

Convener(s): Sebastian Hölz (Germany, IAGA)

Co-Convener(s): Valérie Ballu (France, IAG), Heidrun Kopp (Germany, IASPEI), Paraskevi Nomikou (Greece, IAVCEI)

Description
More than 70% of the Earth surface is covered by ocean. The seafloor is the critical interface where geology, climate, ecosystems, and human activities converge. Yet, a high percentage of the ocean’s seafloor and the subsurface below the seafloor remain unexplored and is both a source of opportunities in terms of unexplored resources (e.g. massive sulfides and hydrothermal fluids) as well as hazards (e.g. due to earthquakes, tsunamis, volcanoes or the exploitation of marine mineral resources). A responsible and sustainable use of resources and mitigation of geohazards require an enhanced knowledge about short- and long-term processes that shape the current sea floor, as well as about its role in the Earth System. Innovative methods help us to better identify and monitor structures, which can be related to geohazards as well as resources. This session invites all contributions of marine geophysical and geodetic research ranging from small to large scales aimed at characterizing structures and dynamics of the Earth’s interior and the seafloor. Solicited fields of research include instrumentation, survey design, data acquisition and novel data processing, visualization, modeling and interpretation procedures. We invite contributions from various fields of offshore geophysical investigations including seismological and seismic, electromagnetic methods as well as contributions from seafloor geodesy.



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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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JA07 Interdisciplinary Observations of Pre-Earthquake Processes. The Concept of Lithosphere- Atmosphere- Ionosphere Coupling (IAGA, IASPEI (EMSEV))

Convener(s): Mala Bagiya (India, IAGA)

Co-Convener(s): Dimitar Ouzounov (USA, IASPEI/EMSEV), Sergey Pulinets (Russia, IASPEI/EMSEV), Katsumi Hattori (Japan, IASPEI/EMSEV), Patrick Taylor (USA, IASPEI/EMSEV)

Description
This symposium concerns the multidisciplinary observations that could lead to understanding processes preceding earthquakes. New results were obtained from seismometers, magnetometers, magnetotelluric stations, GNSS receivers, and Low-Earth-orbiting satellites: DEMETER, Swarm, CSES, etc. This joined analysis of atmosphere-ionosphere connection, seismic records (foreshocks /aftershocks), geochemical, electromagnetic, and thermodynamic processes related to stress changes in the lithosphere established the foundation for the new lithosphere-atmosphere-ionosphere coupling (LAIC) mechanism. This multi-instrumental approach can help support the missing data of the LAIC tools before, during, and after large earthquakes. Presentations will include but are not limited to: observations, modeling; analyses, seismic; geochemical, electromagnetic; and thermodynamic processes; and histories related to stress changes in the lithosphere and their statistical and physical validation. Presentations on the latest developments in earthquake predictability are welcomed.



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JA08 Ground and Satellite Electromagnetic Observations Related to Earthquakes, Tsunami's and Volcanic Activity (IAGA, IASPEI (EMSEV), IAVCEI)

Convener(s): Ramesh Singh (India/USA, EMSEV)

Co-Convener(s): Ken'ichi Yamazaki (Japan, EMSEV), Qingjua Huang (China, IASPEI/EMSEV), Takeshi Hasimoto (Japan, IAVCEI/EMSEV)

Description
The earthquakes, tsunamis, and volcanic eruptions are associated with deep ground and the ocean, and the effects are observed through various observing systems deployed on the ground surface, in the borehole, and the ocean. The multispectral satellites and airborne and drone sensors provide information at a high spatial and temporal resolution of the Earth, Ocean, meteorological, atmosphere, and ionosphere. The global navigation satellite system (GNSS) has proved an added advantage globally to observe signals associated with these natural hazards. Recent observations and data analysis has shown a strong coupling between land, ocean, atmosphere, meteorological and ionospheric parameters with earthquakes, tsunamis, and volcanic eruptions. The changing climate system is believed to play an important role in the slow deformation and stress changes and frequency of these disasters. The session invites contributions based on laboratory, modeling, all kinds of ground and field, borehole, and satellite data analysis to understand the physical mechanism associated with these natural hazards.



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JG02 Theory and Methods of Potential Fields (IAG, IAGA)

Convener(s): Dimitrios Tsoulis (Greece, IAG)

Co-Convener(s): Sten Claessens (Australia, IAG), Maurizio Fedi (Italy, IAGA)

Description
Heterogeneous data sets of increasing spatial resolution describing the shape and structure of the Earth and other celestial bodies as well as their gravity and magnetic fields are currently available. This brings about new developments in the theory and methods of potential fields. Densely sampled Digital Elevation Models, global crustal models and an abundance of potential field models up to and beyond degree and order 5480 provide a dynamic framework for revisiting and updating the methodological apparatus that deals with all aspects of the theoretical description and numerical evaluation of potential functions and their spatial derivatives. The symposium welcomes contributions that fall into this topic and deal with new theoretical or methodological advances in modeling and evaluating potential fields for geodesy and geophysics. Terrain modeling and reductions at all spatial scales, spherical harmonic analysis and synthesis, spheroidal and ellipsoidal harmonics, ultra-high degree and order expansions, and analytical, numerical and multiresolutional techniques in potential field modeling are some of the encouraged keywords. Also welcomed are contributions that deal with source modeling through joint or separate inversion of potential fields.



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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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JH01 New, Large, and Open Data for the Earth and Environmental Science Community (IAHS, IAPSO, IACS, IAGA, IASPEI)

Convener(s): Heidi Kreibich (Germany, IAHS)

Co-Convener(s): Charles Fierz (Switzerland, IACS), Masahito Nosé (Japan, IAGA), Elena Tel Pérez (Spain, IAPSO), Florian Haslinger (Switzerland, IASPEI)

Description
Data is essential for understanding, modeling and managing earth and environmental processes, their interactions and their dynamics. Therefore, the acquisition, management and use of data is a central component of all earth and environmental sciences. New data sources and advanced monitoring methods, including new sensors and instruments on the ground, at sea and in the air, web crawling technology and citizen science, as well as the strong trend towards open data and data sharing, open up fantastic opportunities but also bring challenges. There are concerns, for example, about ensuring and appropriately documenting data quality in particular with respect to ‘new data’, as well as about creating sufficient incentives for monitoring, data sharing and monitoring downstream usage (attribution) with persistent identifiers, or about adequate long-term curation of raw data and derived products. The aim of this symposium is to present and discuss new opportunities, but also challenges of these developments. We want to learn from each other how to support and implement the UNESCO recommendation for open science, the WMO Unified Data Policy, and the IOC/IODE recommendations in the framework of the UN Ocean Decade. For example, issuing and managing persistent identifiers throughout the data lifecycle, building FAIR and CAREful 'open' services, enforcing proper citation, are approaches that help achieving the vision of FAIR (Findable, Accessible, Interoperable and Reusable) and CARE (Collective benefit, Authority to control, Responsibility and Ethics) data that support quality action and research in the open science environment.



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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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JP01 Tides (IAPSO, IAHS, IAGA, IASPEI, IAG)

Convener(s): Joanne Williams (UK, IAPSO)

Co-Convener(s): Jean-Paul Boy (France, IAG), Nick Pedatella (USA, IAGA), Christophe Cudennec (France, IAHS), Philip Woodworth (UK, IAPSO), Evgeny Podolskiy (Japan, IASPEI)

Description
The session will be open to submissions on any aspect of the tides of the ocean, estuaries, lakes, solid earth, and atmosphere. Tides are fundamental to many geophysical processes, driving ocean mixing, contributing to coastal erosion and sediment transport, and influencing ocean biogeochemistry and ecosystems. Tides affect port operations and coastal infrastructure and modulate the severity of storm surges and coastal flooding. Energy from ocean tides is harnessed for electricity generation. In the cryosphere, tides are also important, including for sea ice dynamics, transport and mixing processes. Icy worlds are not only affected by tides but also modulate them. For example, sea ice dampens tidal amplitudes and currents. At the same time, tides regulate the growth of sea ice, contribute to melting of glacial/sea ice, and can be a pacemaker of glacier flow, deformation, and fracture. Interannual variability in the tides may arise from variations in sea ice extent, changes in ocean stratification or regional climate processes. Tides also play an important role throughout Earth's atmosphere, as well as in other planetary atmospheres. Coastal, regional and global models of tides and internal tides continue to develop, as do techniques for observing tides and reconstructing historical tidal data. We welcome presentations on these methods, and discoveries about past and future long-term changes in tides, tidal variability, tidal dynamics, and the impacts of tides.



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JP06 Electromagnetic Studies of the Ice and Ocean System (IAPSO, IACS, IAGA)

Convener(s): Jan Saynisch-Wagner (Germany, IAPSO)

Co-Convener(s): Kenichi Matsuoka (Norway, IACS), Ingo Wardinski (France, IAGA), Neesha R. Schnepf (USA, IAGA), Graham Hill (Czech Republic, IAGA), Christopher Irrgang (Germany, IAPSO)

Description
Electromagnetic signals are sensitive to a wide range of oceanographic and cryospheric system properties, e.g., salinity, temperature, aggregate state, velocity or transport. Electromagnetic observations come from a range of sources: stationary magnetometer observatories providing long time series of data; tracks from ships, gliders, buoys, or planes; measurement expeditions; ocean bottom magnetometers; and observations from passive deep sea telecommunication cables. The session invites studies that utilize the available data to infer information about the state of, or changes in, the ocean-cryosphere system. In addition, we invite numerical or theoretical studies that focus on the respective sensitivities.



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JS03 Probing the Earth’s Lithosphere: Understanding Tectonic, Volcanic, Cryotonic and Geodynamic Processes Using Geophysical Methods (IASPEI, IAG, IAGA)

Convener(s): Uli Achauer (France, IASPEI)

Co-Convener(s): Holger Steffen (Sweden, IAG), Foteini Vervelidou (France, IAGA)

Description
The emergence of many new high-resolution datasets in almost all different disciplines of geosciences over the last two decades further emphasized that most geoscientific objects are so complex, that only interdisciplinary efforts and combination of datasets provide a pathway to decipher their complex structures and variability with time.
Cratonic domaines, hotspot track systems, rifted continental margins, subduction zones, continental baby plumes, intraplate seismicity, coastal subsidence, and impact cratering are just few examples of such processes pertaining in particular to Earth's lithosphere. In this symposium we welcome studies which shed new light on the evolution and geodynamic development of complex geological processes and structures of Earth's lithosphere using geophysical methods. Terrestrial and space-borne studies making combined use of data from different fields in earth sciences, e.g., potential fields like magnetic field and gravity, tectonics, geochemistry, and structural geology, as well as studies including geodynamic modelling are especially welcome. We further invite presentation on multidisciplinary national and international research infrastructures for integrated use of data and their products.



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JS04 Monitoring, Imaging and Mapping of Volcanic Areas (IASPEI, IAG, IAVCEI, IAGA)

Convener(s): Thomas Walter (Germany, IASPEI)

Co-Convener(s): Ronni Grapenthin (USA. IAG), Takeshi Hashimoto (Japan, IAGA), Federico Lucchi (Italy, IAVCEI)

Description
Over 1500 volcanoes are considered active, and are in reach of an estimated 10% of the global population. Volcanoes are curse and blessing for the population, as they are a source of significant hazards difficult to predict, and provide fertile soil and exploitable resources. Thanks to field-constrained eruptive histories of active centers and improved instrumental monitoring on the ground, complemented by high resolution remote sensing and complex modelling, the involved time scales, dimensions of volcanic processes and diversity in eruptive style are much better understood. All this allows identifying the internal structure and unrest, intrusion of magma in reservoirs and dikes, hydrothermal activity and degassing at the surface, and material transport processes to distance. Despite these advances, significant volcano eruptions and location is unpredictable, and the duration, rates, or scale remain largely speculative, as vividly demonstrated for the recent eruptions at Nyiragongo (DR Congo), at Hunga Tonga (SW Pacific), Fagradallsfjall (Iceland), or at La Palma (Canary Islands), and elsewhere. The aim of this joint symposium is to bring together scientists elaborating volcanic areas using monitoring, imaging and modelling techniques, to better understand the past, present, and future of volcanoes, and to access the hazards and benefits of volcanic areas. In particular, we invite contributions using broad techniques from geophysical imaging, seismology, geodesy, as well as from active and passive remote sensing, geochemistry, gas analysis and petrology, in order to exchange on how volcanoes prepare for eruptions, undergo unrest, hydrothermally exhalate during periods of quiescence, and evolve in the short and long term. Moreover, interaction of volcanoes and their surrounding will be discussed in this symposium, trying to better understand and exchange on the role of the tectonics, glaciers, earthquakes, ocean, and climate.



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JS06 Joint Inversion of Different Geophysical Data Sets (IASPEI, IAGA, IAG, IAVCEI)

Convener(s): Christel Tiberi (France, IASPEI)

Co-Convener(s): Mareen Lösing, (Germany, IAG), Max Moorkamp (Germany, IASPEI/IAGA), Alexander Grayver (Switzerland, IAGA), Luca D'Auria (Spain, IAVCEI)

Description
The Earth is composed of various materials with different physical properties. Therefore understanding its structure and dynamics requires a combination of multiple observations and complementary tools. For decades now, the joint use of different geophysical and geological datasets in inversion or modelling has become a popular way of investigating Earth structure and dynamics at many different scales. In this symposium, we will address all aspects of research that utilize the combination of multiple datasets in multiple parameter inversion or modelling. This includes methodological concepts to improve the performance of integrative imaging, innovative applications and case studies of these techniques, theoretical developments and multi-scale approaches. We welcome contributions from all disciplines that use data integration for a better quantitative understanding of the structure and dynamics of the Earth, from the subsurface down to its core.



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JS07 Geophysical Constraints on the Earth’s Deep Interior Combining Modelling and Observations (IASPEI, IAGA, IAG, SEDI)

Convener(s): Jérémy Rekier (Belgia, IASPEI)

Co-Convener(s): Carla Braintenberg (Italy, IAG), David Cebron (France, IAHS)

Description
This symposium aims to bring together contributions from different fields aiming to elucidate the physics of the deep Earth, in particular the Core-Mantle interactions. Recent satellite missions GRACE, GOCE and SWARM have provided invaluable data that can be used to constrain the planet’s deep interior dynamics and physical state. Combined with geodetic and seismic observations, these can be used to constrain the existence of density stratification in the outer core which would affect models of geodynamo, and long-term thermal evolution. With the addition of magnetic observations, magnetohydrodynamics models can be employed to constrain the electric conductivity near the CMB and its direct effect on the Earth’s nutation and length of Day. We also welcome contributions concerning the inner core composition and dynamical interactions with the outer core and mantle.



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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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JV06 Geophysics of Solar System Planets (IAVCEI, IASPEI, IAG, IAGA)

Convener(s): Alessandro Bonforte (Italy, IAVCEI)

Co-Convener(s): Kumiko Hori (Japan, IAGA), Philippe Lognonné (France, IASPEI)

Description
Observations of the distribution, form, and composition of planetary bodies, where subduction, erosion, and vegetation does not obscure surface features. In this session we invite all contributions relating to planetary geology encompassing remote sensing, geomorphology, sample-based, experimental and numerical modelling, and Earth-analogue studies that utilize planetary data to provide a deeper understanding of this fundamental planetary process



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JV07 The Architecture of the Lithosphere in Volcanic Regions (IAVCEI, IASPEI, IAGA, ILP)

Convener(s): Luca Caricchi (Switzerland, IAVCEI)

Co-Convener(s): Kate Selway (Australia, IAGA), Christine Thomas (Germany, IASPEI), Gabi Laske (USA, IASPEI)

Description
The chemical and physical properties of the Earth's lithosphere controls geodynamic processes, the distribution of seismicity and the accumulation and migration of magma to the surface. We welcome research contributions on observations and modeling of lithosphere architecture in volcanic regions as well as the determination of relationships with seismicity, magma chemistry and its transfer to the surface.



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