INTER-ASSOCIATION SYMPOSIA [ IAGA, IACS, IAG, IAHS, IAMAS, IAPSO, IASPEI, IAVCEI ] The first association in the parenthesis is leading the joint symposium

JA01 - Geophysical Constraints on the Earth's Core and Its Relation to the Mantle (IAGA, IASPEI, IAG)

Convener: Jon Aurnou (USA, IAG)

Co-Conveners: Michael Bergman (USA, IAG), Carla Braitenberg (Italy, IAG), George Helffrich (Japan, IASPEI), Tine Thomas (Germany, IASPEI)

Description

This symposium seeks contributions covering from core to mantle, including observations, material properties, structure and dynamics. In the mantle, composition, rheology, density, electric and magnetic properties are required to define the dynamical evolutionary path through space-time. The recent satellite missions GRACE, GOCE and SWARM, and novel teleseismic methods give new insights into deep Earth physical properties and state. Models of mantle convection and the interaction with lithospheric plates and subducted relics use these data as input to define the models in greater detail. Geodetic and seismic data provide inputs necessary for constraining possible stable layers in the outer core, with high resolution models of the geomagnetic field required to make further progress in our understanding of core dynamics and dynamo generation. Seismology and mineral physics continue to work in tandem to further our understanding of inner core structure and dynamics. We also welcome studies concerning global-scale coupling, including the dynamical interaction between the inner, outer core, the mantle and earth rotation.

> U05

JA02 - Geophysical Data Assimilation (IAGA, IACS, IAG, IAHS, IAMAS, IAPSO, IASPEI, IAVCEI)

Convener: Sabrina Sanchez (Germany, IAGA)

Co-Conveners: Marie Bocher (Switzerland, IASPEI), Matthias Morzfeld (USA, IAGA/IAMAS), Takemasa Miyoshi (Japan, IAMAS), Entcho Demirov (Canada, IAPSO), Julien Brajard (France, IAPSO/IACS), Salvatore Grimaldi (Italy, IAHS), Pavel Novak (Czech Republic, IAG),
Alessandro Bonforte (Italy, IAVCEI)

Description

Data assimilation has become a valuable tool for improving our understanding of the Earth and its different dynamical layers, such as the core, mantle, oceans, atmosphere and magnetosphere. By merging sparse observations, complex physical models and their respective errors, data assimilation attempts to unveil hidden features of a given system as well as predicting its evolution. Although its long-term development in the field of meteorology has led to a well-established framework, data assimilation methodologies still bear considerable challenges. Amongst those we can cite the numerical stability of ensemble-based methods such as the Ensemble Kalman Filter, the identification and handling of model errors and biases, the hybridization of variational and sequential approaches, and the usage of multi-model ensembles for parameter estimation. Moreover, in many fields of application, such as core and mantle dynamics, as well as volcanism and space weather, data assimilation remains fairly exploratory. However, these novel applications can provide a platform for further analysis of the aforementioned challenges. This symposium aims at promoting a constructive dialogue between the different geophysical communities with a shared interest in the development of innovative strategies in data assimilation. We therefore particularly encourage the participation of contributions connected to emerging research fields of geophysical data assimilation, as well as the development of libraries, testbeds and computationally efficient data assimilation schemes.

> U03

JA03 - Geophysical Records of Tectonic and Geodynamic Processes (IAGA, IASPEI, IAG, IAVCEI)

Convener: Fernando Poblete (Chile, IAGA)

Co-Conveners: Leonardo Sagnotti (Italy, IAGA), Matthias Morzfeld (USA, IAGA/IAMAS), Marie Bocher (Switzerland, IASPEI), Haluk Ozener (Turkey, IAG)

Description

This symposium aims to bring together a wide range of investigations related to paleomagnetism, magnetic anisotropy, gravimetry, seismic, volcanologic and other geophysical studies intended to unveil tectonic and geodynamic processes at different scales and their links to Earth Dynamics. Thus, presentations may include:

• Characterization of subsurface structures and implications in tectonic evolution
• Tectonic evolution of subduction related orogens
• Geodynamic processes in a collisional setting
• Geodynamic processes at convergent/divergent plate margins
• Plate kinematics

JA04 - Global Electrodynamics and Energetics of Atmospheric Regions from Ground to Space (IAGA, IAMAS)

Convener: Irina Mironova (Russia, IAGA) and Colin Price (Israel, IAMAS)

Co-Conveners: Martin Fullekrug (UK, IAGA), Earle Williams (USA, IAGA) and Eugene Rozanov (Switzerland, IAMAS)

Description

The global atmospheric electric circuit (GEC) comprises the thunderstorm activity maintaining a time-varying, globally-uniform electrical potential difference between the ionosphere and the Earth as well as downward electric currents in the fair weather regions.  The strength of the currents depends on the atmospheric conductivity and ionization produced mostly by galactic cosmic rays. The atmospheric electric field can be measured near the ground at different geographical locations, in particular in pristine atmosphere over Antarctic. The other powerful electrodynamic phenomena related to the intense lightening discharges and the transient luminous events (TLE) are observed by modern satellite-based instruments. The GEC variability is believed to affect cloud properties and modulate the atmospheric state.

The symposium solicits contributions which may advance our knowledge in all areas related to  ionospheric potential, electrical currents, TLE, lightning physics, energetic radiation, energetic particles, and their impact on the Earth's atmosphere, ionosphere and the magnetosphere.

Interdisciplinary studies which emphasize the electrodynamic connection between atmospheric layers, meteorological effects of GEC and possible impact to the climate change are particularly welcome.

JA05 - Solar Influence on the Atmosphere  (IAGA, IAMAS)

Convener: Christoph Jacobi (Germany, IAGA)

Co-Conveners: Katja Matthes (Germany, IAGA/IAMAS), Nicholas Pedatella (USA, IAGA), Peter Pilewskie (USA, IAMAS), Joanna Haigh (UK, IAMAS)

Invited speakers: Hiuxin Liu (Japan), Dimitry Pokhotelov (Germany), Margit Haberreiter (Switzerland)

Description

Solar influence on climate keeps attracting much interest presently. This includes in particular the role of the Sun both in the past climate as in future climate variability as an important aspect. State-of the art climate models include a well resolved stratosphere and partly mesosphere. This allows the prediction of global climate and its changes taking into account expected solar related variability at short to long time scales.

JA06 - Space Weather Throughout the Solar System: Bringing Data and Models Together (IAGA, IAMAS, IAG)

Convener: Enrico Camporeale (Netherlands, IAGA)

Co-Conveners: Sarah Gibson (USA, IAGA), Kyung-Suk Cho (Korea, IAGA), Giuseppe Consolini (Italy, IAGA), Christina Plainaki (Italy, IAGA), Donald Hassler (USA, IAMAS), Earle Williams (USA, IAMAS), Klaus Börger (Germany, IAG)

Description

We encourage contributions pertaining to recent progress in the effective incorporation of data into space weather modeling and prediction at any point along the chain from sun to planets. Moreover, we welcome approaches that are less traditional in the space weather community but possess potential for significant progress in forecasting and understanding space weather, and that draw upon "lessons learned" or "best practices" from applications to non-space-weather problems.

JA07 - Geoscience Data Licensing, Production, Publication, and Citation (IAGA, IACS, IAG, IAHS, IAMAS, IAPSO, IASPEI, IAVCEI)

Convener: Masahito Nosé (Japan, IAGA)

Co-Conveners: Simon Flower (UK, IAGA), Yasuhiro Murayama (Japan, IAMAS), Helle Pedersen (France, IASPEI), Attilio Castellarin (Italy, IAHS), Gabriel Guimarães (Brazil, IAG), Toru Suzuki (Japan, IAPSO), Aude Chambodut (France, UCDI), Giuseppe Puglisi (Italy, IAVCEI)

Description

A number of national and international geoscience research infrastructures have been created in recent years, for example, EPOS (the European Plate Observing System), Copernicus (European Union's Earth Observation Programme), IUGONET (the Inter-university upper atmosphere global observation network), EarthCube (the ‘system of systems’ infrastructure for geosciences) and AuScope (the Autralian geoscience and geospatial infrastructure). At the same time the World Data System is evolving and certification of data repositories (ICSU-WDS, CoreTrustSeal) is becoming an important concern. Together these initiatives make it possible for users to easily access huge archives of disparate geoscience data and metadata in a secure and reliable manner, a task that was complex and time consuming before these initiatives were available.

Clear licensing of geoscience data gives users clarity over how they can use and share the data, protects the rights of data providers and promotes integrated research. Data publication and citation will benefit data suppliers by giving them proper credit, professional recognition and rewards for their works, in a similar manner to the way that publication of scientific results benefits scientific researchers. Licensing, publication and citation of data are becoming a requirement for contribution to geoscience infrastructures. The system of licensing, producing, publishing, and citing of geoscience data is a structure for persistent intellectual content identification and management as well as for connection of users with content suppliers.

This symposium solicits contributions presenting actual practices and future plans of data licensing, producing, publication, and citation of scientific data, and possible related topics.

JA08 - Probing the Earth’s Lithosphere and Its Dynamics Using Geophysical Modeling (IAGA, IASPEI, IAVCEI, IAG)

Convener: Foteini Vervelidou (Germany, IAGA)

Co-Conveners: Stavros Kotsiaros (USA, IAGA), Robert Tenzer (Hong Hong, IAG), Jörg Ebbing (Germany, IAG/IAGA), Rob Govers (Netherlands, IASPEI/IAG), Javier Fullea (Ireland, IASPEI), Magdalena Scheck-Wenderoth (Germany, ILP), Silvia Massaro (Italia, IAVCEI)

Description

This symposium focuses on the structure and dynamics of the Earth’s lithosphere. Multiple geophysical observations help us probe the Earth’s lithospheric structure and understand its dynamic behavior. These include the magnetic and gravity field, electromagnetic induction, heat flow and seismological data.

The lithospheric magnetic field reflects properties like composition and temperature and carries information about tectonic, chemical, and thermal alterations that magnetized rocks have undergone throughout their history. Gravity field, apart from information on composition, reveals information about mass exchange mechanisms related to dynamic processes like sea level rise, glacial retreat, and lithospheric flexure. Magnetotelluric studies image Earth’s electrical conductivity from the near-surface to deep within the mantle. Seismological methods including receiver functions map the location of major interfaces like the Moho and the Lithosphere-Asthenosphere Boundary. Seismic velocities can be inverted for density and temperature, and seismic attenuation and seismic anisotropy are correlated with temperature and strain, respectively. Global heat flow measurements help constrain the lithospheric geotherm and Earth’s energy budget. These geophysical data sets provide us with a highly valuable data pool for the study of the Earth’s lithosphere and its mechanical strength.

We solicit contributions focused on any related geophysical data set or combinations of them with the ultimate goal of enhancing our knowledge about the structure, composition and dynamics of the Earth’s crust and uppermost mantle. In this respect, we welcome contributions from studies focusing on data collection and processing, global or regional modeling and interpretation of data and models in terms of tectonic, geological or geophysical implications.

> U04

JA10 - Electromagnetic Signals Generated by Volcanic Eruptions/Activity, Fluid Pressure, Earthquakes and Aseismic Fault Slip (IAGA, IAVCEI, IASPEI)

Convener: Jacques Zlotnicki (France, IAGA)

Co-Conveners: Malcolm Johnston (USA, IAGA/IASPEI), Takeshi Hashimoto (Japan, IASPEI/IAVCEI), Xuhui Shen (China, IASPEI), Yoichi Sasai (Japan, IAVCEI)

Description

Changes in inter-related crustal stress, deformation, pressure/temperature of electrically conducting fluids and pore pressure in crustal rocks all occur in both volcanic regions and regions of seismic and aseismic fault failure. All these processes generate electric and magnetic (EM) fields. Furthermore, global EM effects are observed in the atmosphere and ionosphere with explosive ash eruptions. While co-eruptive effects and co-seismic fault failure effects in EM fields, deformation, seismicity and geochemistry are readily observed and modeled, the inter-relation between various parameters during periods of volcanic unrest and aseismic activity that are driven by perhaps the same underlying physics is much less clear. This symposium focuses on bringing together examples of multi-parameter land and satellite observations during volcanic activity and earthquake rupture (Part 1), non-eruptive volcanic activity (Part 2) and aseismic fault activity (Part 3) in order to identify the dominant but perhaps changing physical processes involved. Knowledge of the non-uniform EM tomography of volcanoes and fault systems is a necessary prerequisite for modeling these different processes.