The 26th IUGG Genereal Assembly 2015 will be held in Prague Congress Centre from June 22 to July 2, 2015.
Dear Colleagues,
You may have noticed that the 26th General Assembly of the International Union of Geodesy and Geophysics (IUGG) is fast approaching. This event will be held in Prague, Czech Republic, from the 22nd of June to the 2nd of July 2015. As chairman of the Local Organising Committee IUGG 2015, and on behalf of the entire Czech Geosciences community, I cordially invite you to attend this once-in-a-lifetime scientific and social event.
IUGG holds its general assembly every four years and Prague is proud to be the only city to host this event for the second time. In 1927, Prague hosted the third IUGG General Assembly of 300 participants.
Since then, the IUGG has made admirable breakthroughs in all aspects of Earth Sciences. Currently, IUGG is a composite of eight semi-autonomous associations covering various physical, chemical, mathematical, and environmental disciplines. Concurrently, Prague has flourished in the last two decades and become an affordable destination with high quality services
http://www.iugg2015prague.com/
Key dates to remember September 2014 Registration & Accommodation OPEN
January 15, 2015 Grant applications CLOSE
January 31, 2015 Abstract submission DEADLINE
March 31, 2015 Notification to successfull grantees
April 10, 2015 Registration Early Bird fee DEADLINE
April 10, 2015 Registration DEADLINE for grantees
June 15, 2015 Registration Standard fee DEADLINE
June 22 - July 2, 2015 GENERAL ASSEMBLY IN PROGRESS
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Рекомендуемые секции
- A11 Electrodynamics and Energetics of the Middle Atmosphere Exploration with Ground and Space Experiments (Div. II-A)
Convener: Martin Fullekrug (Bath, U.K.)
Co-conveners: Ondřej Santolík (Prague, Czech Republic), Mitsuteru Sato (Sapporo, Japan), Fernanda Sao Sabbas (Sao Paolo, Brasil)
Description
The recent discovery that lightning discharges can cause energetic radiation, relativistic particles, and transient luminous events in the middle atmosphere has marked a profound advance in our understanding of the Earth's atmospheric electrodynamic behaviour. This symposium explores these novel processes and their impact on the near-Earth environment which is explored by space missions supported by ground based field work. The symposium solicits contributions which advance knowledge in the areas of the global atmospheric electric circuit, lightning physics, transient luminous events, energetic radiation, relativistic particles, and their impact on the Earth's upper atmosphere and the magnetosphere. Interdisciplinary studies which emphasize the connection between atmospheric layers, their electrodynamics and climate change are particularly welcome.
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- A12 Coupling Processes in the Atmosphere-Ionosphere System (Div. II-C/ICMA/SCOSTEP)
Convener: Petra Koucká Knížová (Prague, Czech Republic)
Co-conveners: Erdal Yigit (Ann Arbor, USA), Subramanian Gurubaran (ICMA, Navi Mumbai, India)
Description
The objective of this symposium is to bring new insights into the understanding of the coupling processes in the atmosphere-ionosphere system. Coupling processes covers various dynamical, chemical, and electrodynamical processes. The coupled effects can be expessed in terms of the modulation of waves from lower to 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. Middle atmospheric dynamics, and particularly atmospheric waves, play a leading role in determining the variability of the atmosphere-ionosphere system. The MLT region is a critical region in the coupling between the lower/middle atmosphere and the upper atmosphere/ionosphere. It represents physical filter and shape the flux of waves ascending through the mesosphere into the overlying thermosphere. 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 yet to be understood. This symposium solicits papers dealing with experiments, observations, modeling and data analysis that describe the effects of atmospheric coupling processes within the atmosphere-ionosphere system. It will address both theoretical and empirical recent results concerning the coupling mechanisms through dynamics, composition and electrodynamics. The symposium will be particularly focused on the dependence of coupling processes on the solar and geomagnetic activity, the downward control effects transferring from the strongly solar dependent structure to the lower atmospheric levels and upward propagating structures induced in the lower atmosphere by changing solar activity.
This symposium is co-sponsored by the International Commission on the Middle Atmosphere (ICMA) of IAMAS.
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- A13 Solar-Related Variability of the Lower, Middle and Upper Atmosphere (Div. II-D/ IAMAS-ICMA/IAMAS-IRC)
Convener: Christoph Jacobi (Leipzig, Germany)
Co-conveners: Werner Schmutz (IAMAS-IRCDavos, Switzerland), Katja Matthes (Kiel, Germany), Nicholas Pedatella (Boulder, USA)
Description
The solar influence on the climate system has received increased attention over recent years. In particular the role of the sun in future climate variability is an important aspect taking into account a possible decline of solar irradiance. 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. From available datasets it is not always straightforward to distinguish between solar and meteorological influences. Time series are often too short to clearly identify, e.g., the 11-year solar cycle in the presence of nonlinear trends owing to lower atmospheric variability. The effect of planetary waves at time scales of days to weeks is difficult to extract from time series in the presence of the solar rotation effect and harmonics. 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. Results from observations, including observation and modelling solar forcing, theoretical work and modelling efforts to quantify meteorological and solar effects on the lower, middle, and upper atmosphere and the climate system as a whole are welcome. In particular, results from national and international projects like ROSMIC, and from global modelling initiatives are solicited.
This symposium is co-sponsored by the International Radiation Commission (IRC) and International Commission on the Middle Atmosphere (ICMA) of IAMAS.
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- A14 Equatorial Spread-F, Equatorial Ionization Anomaly (EIA) and F3-Layer Studies During Geomagnetic Quiet and Disturbed Periods (Div. II-E)
Convener: Paulo Roberto Fagundes (Sao Jose Dos Campos, Brasil)
Co-convener: Maxim Klimenko (Kaliningrad, Russia)
Description
The occurrence of equatorial spread-F, equatorial ionization anomaly (EIA) and the development of the F3-layer present a strong day-to-day variability, mainly caused by the thermospheric wind and wave actions (gravity waves, tides, planetary waves, TIDs and MSTIDs). Recent multi-instrument and multi-site observations, as well as, theoretical and simulation investigations have advanced our understanding of these phenomena, both during geomagnetic quiet and disturbed periods. The objective of this symposium is to bring together experimentalists and theoreticians to survey the latest results, examine new ideas and concepts, and to indicate important future directions in equatorial and low-latitude research.
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- A15 Long-Term Trends in the Stratosphere, Mesosphere, Termosphere and Inosphere (Div. II-F/ICMA/SCOSTEP)
Convener: Jan Laštovička (Prague, Czech Republic)
Co-convener: G. Beig (ICMA, Pune, India)
Description
Greenhouse gases and other drivers cause long-term trends at higher levels in the atmosphere and ionosphere, which are much stronger than tropospheric trends. Papers on progress in investigating trends in the stratosphere, mesosphere, thermosphere and ionosphere, based on ground-based as well as satellite-borne observations, model simulations, theoretical analyses, statistics and determination of trends, and laboratory experiments, are welcome. Particular attention should be paid to papers dealing with synthesis of various results and papers dealing with areas of open problems, like the quantitative difference between observations and models or long-term trends in winds and atmospheric wave activity.
This symposium is co-sponsored by the International Commission on the Middle Atmosphere (ICMA) of IAMAS.
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- A16 Energetic Particle Precipitation into the Atmosphere: Sources and Atmospheric Impacts (Div II-D/IAGA Div II-VERSIM/ICMA)
Convener: Craig Rodger (Otago, New Zealand)
Co-conveners: Mark Clilverd (Cambridge, U.K.), Bernd Funke (ICMA, Granada, Spain)
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. 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, or the impact of the precipitation on the ionosphere or atmosphere are welcome. We particularly welcome observations of atmospheric chemical changes caused by energetic particles, new measurements from the Van Allen Radiation Belt Storm Probes or BARREL balloon campaigns showing energetic electron loss examples, or approaches showing how electron precipitation impacts can be applied by the atmospheric community. Results from the SCOSTEP SPeCIMEN and ROSMIC programmes, as well as from SPARC’s SOLARIS-HEPPA activity are solicited.
This symposium is co-sponsored by the International Commission on the Middle Atmosphere (ICMA) of IAMAS.
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- A17 The Earth’s Plasmasphere: Remote Sensing and Modelling (Div. II-VERSIM)
Convener: Janos Lichtenberger (Budapest, Hungary)
Co-conveners: Anders Jorgensen (Socorro, USA), Fred Menk (Callaghan, Australia)
Description
The plasmasphere is a dynamic system governed by solar activity and coupled by electromagnetic fields, currents and particle fluxes to the underlying ionosphere and atmosphere. Populated by dense cold plasma but also straddled by the ring current and radiation belts, dynamics of the plasmasphere plays an important role in Earth’s space weather system. The cold background density is a key parameter in wave-particle interactions in the radiation belts, but information on this is not always known with sufficient spatial and temporal resolution to be able to estimate wave power. Recent advances in modelling the plasmasphere, including physics based, empirical and data assimilative approaches, improve our understanding on the dynamics of this region. These modelling efforts are based on ground based as well as in-situ measurements. Opportunities for ground-based remote sensing have grown rapidly with the deployment of many instrument arrays, while in situ observations are facilitated through multi-satellite missions.
This symposium focuses on:
1. Ground based remote-sensing techniques, including measurements using ULF-ELF-VLF electromagnetic waves,
2. In-situ satellite-based measurements, particularly results on the plasmasphere from the Van Allen Probes and Themis missions and other satellite radio sounding and imaging experiments,
3. Advances on modelling of the plasmasphere and plasma trough and the dynamic behaviour of the plasmapause.
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- A18 Sun-Earth System Response to Extreme Solar Events and Space Weather (Div. II/Div. III)
Convener: Nanan Balan (Sheffield, U.K.)
Co-conveners: Andrew Yau (Calgary, Canada), J. Y. Liu (Jhongli, Taiwan)
Description
The symposium provides a forum to bring together scientists working in different ST disciplines to present and discuss their works on Sun-Earth system response to extreme solar events and space weather. Solar events such as CMEs and ICMEs offer valuable information about the physical processes involved in coupling the Sun-Earth system through magnetic reconnection, wave-particle interaction, ring current intensification, geomagnetic storms, electric field intensification, and thermospheric and ionospheric storms. Important aspects of public interest include space weather effects on satellite systems and astronauts, communication and navigation, power grids and climate, severity of space weather and prediction, etc. Papers based on observations, theory and modeling are solicited.
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- A19 ULF Waves: Space-Ground Coordination (Div. III)
Convener: Colin Waters (Callaghan, Australia)
Co-convener: Mark Engebretson (Minneapolis, USA)
Description
ULF waves are a persistent feature of magnetized planets and are detected by spacecraft and ground instrumentation over all magnetic activity levels. Observations and modeling of these waves provide information on changes of magnetospheric configuration, locations of boundary regions, and associated energy and mass transport processes. This symposium focuses on the detection and interpretation of ULF wave signals ranging from irregular Pi activity to more continuous Pc1-5 waves and associated space and space-ground relationships. These include, but are not limited to, waves in the vicinity of the magnetopause, polar cap ULF wave signatures, solar wind to magnetosphere wave transfer studies, global Pc waves in the outer magnetosphere, and ionospheric influences on ground ULF wave signatures. Due to the limited number of high-altitude spacecraft, ground-based observations are required to maximize the spatial-temporal coverage of magnetospheric dynamics that can be monitored by ULF waves. Contributions addressing the calibration of ground against spacecraft data are particularly welcome, in addition to comparisons that reveal propagation properties (or not) of these waves. Experimental and modeling studies of ULF waves in other planetary systems are also welcome.
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- A20 ULF waves in the inner magnetosphere (Div. III)
Convener: Kazue Takahashi (Laurel, USA)
Co-convener: Peter Chi (Los Angeles, USA)
Description
Observations with multi-spacecraft missions as well as magnetometer arrays, radars, and all-sky imagers continue to improve our understanding of the spatial and temporal structure of ULF waves in the magnetosphere. I addition, numerical techniques have advanced such that 3D MHD simulation is now capable of producing field line resonance and gyro kinetic codes is being used to study ULF wave-particle interaction in the dipole magnetic field. This symposium invites papers on recent observational and theoretical results on ULF waves in the inner magnetosphere, loosely defined to be the region around and inside of the geostationary orbit. Possible topics include, but not limited to, ULF waves generated by solar wind disturbances or internal plasma instabilities, plasmapause and ionospheric effects on wave propagation, and new observational, theoretical, or numerical techniques. Papers specifically addressing the relationship between waves in space and on the ground should be submitted to Symposium A19. Papers specifically addressing wave-particle interaction in the radiation belt and ring current during geomagnetic storms should be submitted to Symposium A21.
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- A21 Wave and Particle Dynamics in the Radiation Belts and Ring Current (Div. III)
Convener: Jacob Bortnik (Los Angeles, USA)
Co-convener: Scot R. Elkington (Boulder, USA)
Description
Recent progress in the understanding of radiation-belt energization and loss processes, as well as ring-current build-up and decay, has shown that the system is highly variable, and relies on a variety of different waves and other transient phenomena to couple the dynamic processes occurring in the inner magnetosphere. Multiple energization and loss process occur simultaneously, over a variety of spatial scales ranging from microscopic wave-particle interactions, to global-scale interactions, and a variety of temporal scales, from milliseconds to hours. In this symposium, we will focus on the dynamical behaviour of radiation-belt and ring-current particles, the global variability and coupling to the inner magnetosphere, and the nature and spatiotemporal distribution of the underlying waves that control this behaviour.
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- A22 Magnetospheric Boundary Layers (Div. III)
Convener: Katariina Nykyri (Daytona Beach, USA)
Description
Physical processes and properties of the magnetospheric boundary layers are crucial in determining the solar wind impact on Earth’s magnetosphere. The main physical mechanisms that facilitate energy, momentum and plasma transport at the magnetopause include Magnetic reconnection, Kelvin-Helmholtz Instability and diffusive mechanisms such as wave particle-interactions. Recent multi-spacecraft missions such as THEMIS and Cluster have made it possible to observe these processes with multi-point measurements enabling calculations of gradients and distinction between temporal and spatial changes. In this symposium we focus on the recent advances in boundary layer physics and properties. We welcome contributions from modelers, theorists and data-analysts to address the importance of boundary layer (magnetosheath, magnetopause, the cusps, high- and low-latitude boundary layer ) processes and properties on magnetospheric dynamics.
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- A23 Different Response Modes of the Magnetosphere to Solar Wind Driving (Div. III)
Convener: Larry Kepko (Greenbelt, USA)
Description
It is well known that magnetospheric activity is directly linked to the input of energy from the solar wind. In response to increased energy input associated with a southward component of the interplanetary magnetic field, the magnetosphere may store and release this energy through a variety of response modes. These include, but are not limited to, substorms, pseudo-breakups, steady magnetospheric convection, and sawtooth events. The coupling response is further complicated by seasonal effects and massloading of the magnetosphere by ion outflow. The unprecedented magnetospheric in situ measurements combined with extensive ground-based instrumentation and advanced simulations have greatly increased our knowledge of how the magnetosphere responds to different solar wind driving conditions. We invite investigations that examine the different response modes of the magnetosphere, including substorms, SMCs and sawtooth events, and how these responses manifest in all areas of geospace.
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- A24 The Plasmasheet - Ionosphere, a Coupled System: Sinks, Sources, Transport and the Roles of Field-Aligned Currents and Ion Outflow (Div. III/Div. II)
Convener: Simon Wing (Laurel, USA)
Co-conveners: Jay Johnson (Princeton, USA), Larry Lyons (Los Angeles, USA), Göran Marklund (Stockholm, Sweden), Kanako Seki (Nagoya, Japan)
Description
Observations, modeling, and theory have now reached the point where the plasma sheet and its coupling to the ionosphere can be considered as a whole at Earth as well as at other planetary bodies, rather than treated as separate issues within ionosphere or plasma sheet physics. The plasma sheet is formed from particles entering directly and indirectly from the solar wind and the ionosphere. The structure and asymmetry of its pressure, temperature, density, and entropy are determined by the particle entry, transport, and loss processes. All these processes are in turn strongly affected by the electrodynamical coupling with the ionosphere. The plasma sheet dynamics, in particular through the field-aligned currents, strongly affects the ionosphere via particle precipitation and Joule heating. The ionospheric outflows can affect the transport processes in the plasma sheet. Furthermore, the Region 2 currents cause strong modifications of the global ionospheric electric field distribution, at middle latitudes by shielding and penetrating electric fields, at higher latitudes supporting the SAPS, and in the auroral region causing the Harang electric field reversal. In contrast to Earth, the interaction between the plasma sheet and the ionosphere at the giant magnetospheres is largely driven internally by centrifugal stresses rather than by the solar wind. Plasma from the internal sources is transported radially outward and lost down the magnetotail. Papers are solicited for this symposium on any of the above or related topics, of importance for determining the formation of the plasma sheet (sources and losses), its structure and dynamics, and/or the effects of electrodynamical coupling on ionospheric and magnetospheric processes. Papers dealing with the system as a whole or the coupling processes are also appropriate.
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- A25 Auroral Processes (Div. III)
Convener: David Knudsen (Calgary, Canada)
Co-convener: Goran Marklund (Stockholm, Sweden)
Description
The auroral ionosphere and the field lines that thread it define a region of greatly enhanced energy transfer between the solar wind, magnetosphere, ionosphere, and thermosphere. Decades of in-situ measurements and centuries of ground-based observations have led to identification of key aspects of auroral physics, including the connection between auroral arcs and field-aligned currents, electric potential drops parallel to the geomagnetic field, and the role of ionospheric conductivity in determining the frequency and intensity of auroral arcs. However, there remains no widely-accepted, self-consistent theory able to account for the generation, morphology, particle acceleration and energy flux characterizing even the most common auroral forms. This symposium will provide a forum for new theoretical, experimental, and simulation results pertaining to all auroral phenomena. Critical reviews of the current state of understanding of the discipline are also encouraged.
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- A26 High-Latitude Electrodynamics and the Polar Cap (Div. III)
Convener: Steve Milan (Leicester, U.K.)
Co-convener: Lasse Clausen (Oslo, Norway)
Description
The polar caps and auroral zones are a key energy sink for the coupled solar wind-magnetosphere-ionosphere-thermosphere system, and also provide a screen on which magnetospheric dynamics can be imaged and explored. Auroral morphology, including the occurrence of transpolar arcs, and the size of the polar cap provide an indication of magnetospheric structure, whereas ionospheric plasma drifts are a measure of flux transport in the magnetospheric convection cycle. Patches of enhanced ionization drifting across the polar cap, entrained within the convection flow, are an indication of ionospheric structuring by time-dependent electrodynamics. The auroral zones are the seats of energy deposition through particle precipitation and Joule heating, but are not passive recipients of magnetospheric energy and play an active role in the dynamics of the magnetosphere by providing current closure and ionospheric outflow. Understanding the complex coupling of high-latitude electrodynamics, ionospheric structuring and outflow, and magnetospheric dynamics - and the role of substorms and geomagnetic storms in modulating these - is of vital importance to space physics. Papers on modelling studies and ground- and space-based multi-instrument observations of this coupling are solicited. Comparisons of numerical simulations with observations from multiple platforms are also welcome to this symposium.
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- A27 Reporter Review for Div III
Convener: Clare Watt (Reading, U.K.)
Description
New and exciting research from Division III scientists published in 2013-2015 will be summarised by the Reporters, following eight themes: (1) Magnetopause and boundary layer, (2) Auroral phenomena, (3) ULF waves, (4) Tail dynamics, (5) Inner-magnetosphere, (6) Wave-particle interaction in the inner-magnetosphere, (7) Global magnetospheric dynamics, and (8) Magnetospheres other than Earth. The symposium will consist of eight solicited talks.
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- A28 New advances in Solar and Interplanetary Physics (Div. IV)
Convener: Spiros Patsourakos (Ioannina, Greece)
Co-conveners: Yuan-Kuen Ko (Washington, USA), Nour Eddine Raouafi (Laurel, USA)
Description
This symposium is dedicated to new observational results from present space and ground-based observatories, and latest theoretical and modelling work on the dynamics and structure of the Sun and the interplanetary medium. We in particular welcome presentations on new advances about the physics of solar eruptions, heating of the corona, origin and acceleration of the solar wind, acceleration and transport of energetic particles, plasma waves and turbulence as well as their interactions with particles, and the dynamics/structure in the interplanetary space. We also solicit presentations on planned new space missions and ground instrumentation. The symposium is aimed at stimulating discussions and exchanges from different perspectives to improve our understanding of the Sun and the interplanetary medium as a system.
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- A29 Wave and Turbulence in the Solar Atmosphere and Solar Wind (Div. IV)
Convener: Valery Nakariakov (Warwick, U.K.)
Co-conveners: Bo Li (Weihai, China), Gang Li (Huntsville, USA)
Description
Waves and turbulence in the solar corona and solar wind are a critical topic on both theoretical and observational grounds. Remote-sensing observations have recently revealed magnetohydrodynamic (MHD) waves in the solar corona. Meanwhile, sophisticated numerical MHD simulations become available that shed light on how these waves are generated and dissipated, as well as the possible role of kinetic effects. Solar wind turbulence in interplanetary space remains a hot topic, with remarkable observational and theoretical progresses in terms of wave-vector anisotropy, nature of turbulence at kinetic scales, intermittent heating, and so on. Solar wind models are also improved to incorporate important effects of wave and turbulence. In this symposium, we solicit contributions on both the observational analysis and theoretical modeling of waves and turbulence in the solar corona and wind. We look forward to get a comprehensive overview of what we have known about waves and turbulence in this context, and discuss recent results and anticipated future breakthroughs.
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- A37 Geophysical and Geomagnetic Diagnosis of the Sun and Near-Earth Space (Div. V/Div. III)
Convener: Renata Lukianova (Moscow, Russia)
Co-conveners: Paola De Michelis (Rome, Italy), Kalevi Mursula (Oulu, Finland)
Description
Dynamic processes that occur in the near-Earth space and are mainly driven by solar variability, produce perturbations in the various geophysical parameters. In particular, observations of geomagnetic variations provide a valuable method to monitor and quantify processes taking place in different locations of the near-Earth space and have been used as proxies for solar wind, IMF and solar activity. Measuring various geophysical parameters, such as electromagnetic fields and waves, neutral and charged particles, density, velocity and energy distributions allows us to explore atmospheric dynamics and composition, ionospheric and magnetospheric electrodynamics, solar wind conditions and, eventually, the evolution of the Sun. This symposium calls studies related to the analysis and interpretation of the spatial-temporal variations of the geomagnetic field and geophysical parameters in order to examine phenomena occurring in the Sun and in near-Earth space. Both short-term event studies of space weather, long-term studies of the space climate, modeling of the space environment and development of diagnosis tools for these purposes are welcome.
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- A39 Geomagnetic Observatories, Variometers and Repeat Surveys: Instrumental and Operational Developments and Applications (Div. V)
Convener: Bill Worthington (Denver, USA)
Co-conveners: Jurgen. Matzka (Potsdam, Germany), Bhaskarapantula Veenadhari (Navi Mumbai, India)
Description
Geomagnetic measurements are performed at a variety of locations and for different purposes, such as secular variation and space physics, which sometimes overlap. Data from geomagnetic observatories and repeat stations are both used for producing absolute magnetic data useful for main field modeling. Variometers are an integral part of geomagnetic observatories and repeat stations, yet can be used independently for external field studies and can be used to produce long-term time series. The world magnetic observatory network and associated large data series enhances the investigation of space weather studies, magnetospheric-ionospheric coupling, solar quiet, and secular variations. This symposium deals with advancements in equipment and methodology for all three types of measurements and the progress made in distributing the data through global networks and databases. Contributions are invited for the subjects mentioned, including geomagnetic observatory instrumentation and operations, data processing and management, variometer networks, one-second data, and improvements of the global coverage of geomagnetic measurements.
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- A40 Use of Indices and Recovered Analogue Records in Geophysical Data Analysis (Div. V)
Convener: Heather McCreadie (Durban, South Africa)
Co-convener: Aude Chambodut (Strassbourg, France)
Description
Geomagnetic indices and recovered analogue records have provided and continue providing long-term data sets for describing magnetic field variations and monitoring near Earth space conditions over many solar cycles. These valuable databases allow exploration of both short-term changes in space weather and the long-term evolution called the space climate. In this symposium, we solicit papers that address any of a versatile range of topics related to geomagnetic indices and historical analogue records such as: special solar-terrestrial events and processes; description of geomagnetic activity and magnetic storminess; short-term and long-term drivers of magnetic disturbances and storms and their relation to the Sun; indices and geomagnetic observations in research and applications; short-term variability of the space environment and space weather; and longterm variability and space climate.
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- A43 Characterization of Ionospheric and Magnetospheric Processes from Ground and Satellite Observations and Their Connection to Space Weather (ICDC/Div. II/Div. III/Div. V)
Convener: Inez S. Batista (Sao Jose Dos Campos, Brasil)
Co-convener: Hisao Takahashi (Sao Jose Dos Campos, Brasil), Archana Bhattacharyya (Navi Mumbai, India)
Description
This symposium will accept contributions for both oral and poster presentations on general studies of the upper atmosphere, ionosphere, and magnetosphere. The emphasis will be on characterization of ionospheric and magnetospheric processes using ground and /or satellite observations, as well as theoretical and simulation studies. Contributions involving the coupling processes between atmosphere/ ionosphere/ magnetosphere are strongly encouraged. Special emphasis will be given to the connection between the different processes and Space Weather studies, particularly concerning their relevance to the research conducted in developing countries and contribution to the space-related technology and applications.
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- Joint inter-association symposia
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- JA1 Joint Inversion and Mutually Constrained Inversion of Geophysical Observations (IAGA, IAG, IASPEI)
Convener: Oliver Ritter, Potsdam, Germany (IAGA)
Co-conveners: Pavel Novak, Plzen, Czech Republic (IAG); Malcolm Sambridge, Canberra, Australia (IASPEI); Max Moorkamp, Leicester, U.K. (IAGA)
Description
We invite contributions on novel inversion methods with application across the geosciences. Of particular interest are 3D imaging, joint inversion of geodetic, geophysical and geochemical datasets, and multi-disciplinary interpretation approaches such as integration of gravity, EM and seismic data or thermo-mechanical modelling studies constrained by physical parameters.
State-of-the-art geophysical inversions are typically non-unique, suffer from poorly constrained or low sensitivity model domains, sometimes in agreement with, more often ignoring geological, other geophysical or geochemical a priori information. The additional information gained from multi-method inversions of a single physical parameter (such as in seismic imaging and tomographic inversion or full waveform inversion approaches) or combined multi-physics inversion approaches (e.g. by combining mass density, electrical conductivity and elastic properties) may eventually lead to more consistent information on structure and processes present in the subsurface. Constrained joint inversions may also enhance our way of imaging temporal changes at depth, both in the long term (e.g. for understanding the physics of geodynamic processes) or in short term (e.g. fluctuations caused by geotechnical installations such as enhanced hydrocarbon recovery or geothermal systems).
We encourage papers on methodological and numerical advances for geophysical inverse modelling. Contributions demonstrating applicability of joint or constraint inversion approaches with real data are particularly welcome.
This symposium will follow up on Union Symposium U6.
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- JA2 Modelling of Space Weather Effects: Solar, Magnetospheric and Earth Resistivity Constraints (IAGA, IAMAS)
Convener: Alan Thomson, Edinburgh, U.K. (IAGA)
Co-conveners: Larisa Trichtchenko, Ottawa, Canada (IAGA)
Description
Space weather has the potential to impact many modern technologies, such as spacecraft, satellite operations, communications, aircraft and power grids. Examples of relatively recent major space weather events, with known impacts, include the severe magnetic storms of 1989 and 2003. Understanding, modelling and predicting the extent to which space weather can affect systems draws on skills from across many scientific disciplines, requiring input from both space and Earth scientists. In this symposium we welcome contributions on all aspects of the modelling of space weather and its effects, from the Sun to Earth. This includes the modelling of the various interactions between travelling solar storms and the solar wind, magnetosphere, ionosphere and solid Earth and the validation of models through measurements. Contributions on models developed to aid end-users, such as satellite and power grid operators, survive the impact of space weather are also encouraged.
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- JG2 Modelling the Atmosphere and Ionosphere by Space Measurements (IAG, IAGA, IAMAS, IACS)
Convener: Marcelo Santos, New Brunswick, Canada (IAG)
Co-conveners: Hanli Liu, Boulder, USA (IAGA)
Description
Space measurements of various types play a fundamental role in our growing understanding of the various processes in the Earth’s atmosphere, especially the coupling of its different layers. The different disciplines of geodesy, aeronomy, geomagnetism and meteorology contribute and benefit in a multi-disciplinary way. They involve observing satellite systems, whether dedicated or not, and the development and application of models and techniques to treat, assimilate, represent and interpret those measurements.
We encourage the submission of papers dealing with methodology, applications, as well as with inter-comparisons and validation. They include the assessment, validation and discussion of current and future satellite systems; the modelling of atmospheric corrections for geodesy; GNSS-based atmospheric sounding; advancements in the modelling of the atmosphere, including tomographic techniques; modelling and interpretation and modeling of space weather and its coupling with the terrestrial weather; assimilation of measurements into numerical models; and use of long-term space-based monitoring and numerical models for a variety of applications, including terrestrial and space climate. We accept contributions dealing with global and regional scales.
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