IAGA in Toulouse - Division III Symposium

GAIII01 The magnetospheric particle accelerator

Energetic particles in the magnetosphere produce fascinating aurora phenomena as well as magnetic storms, and highly energetic particles nowadays cause satellite anomalies or failure. Interest in the energetic particles has been increasing, which stimulates deep scientific understanding when, where and how particles are accelerated in the magnetosphere. This session "magnetospheric particle accelerator" will cover reconnection, aurora, plasma sheet, ring current and radiation belt, and this session further aims to unify the discussion of acceleration processes. Thus we invite papers on recent measurements of the auroral region, plasma sheet, and inner magnetosphere and the theoretical papers by means of advanced computer simulations on particle acceleration in the magnetosphere.

Convener: T. Obara, Applied Research and Standards Department,National Institute of Information and Communication Technology, 4-2-1, Nukuikita, Koganei. Tokyo 184-8795, Japan; tel +81-42-327-6431; fax +81-42-327-6661; e-mail: t.obara@nict.go.jp
Co-conveners: A. Chan, Rice University, Dept. of Physics and Astronomy, USA; J. Birn, Los Alamos National Laboratory, Los Alamos, New Mexico, USA; W. Lotko, Dartmouth College, Hanover, New Hampshire, USA

GAIII.02 Electrodynamics of Aurora

Recent Observations from FAST, Polar, and Cluster as well as sounding rocket missions have continued to make progress in the understanding of the electrodynamic processes that give rise to the aurora. It is useful to organize auroral acceleration into upward current, downward current, and Alfvénic acceleration regions, each of which has their own characteristics. Coordination of data obtained from different satellite missions, ground observations and optical imaging of the aurora is giving an improved picture of the global structure and dynamics of the auroral acceleration process. Theory and modeling efforts emphasizing the dynamics of this region are now becoming sophisticated enough to study the details and time-dependence of auroral acceleration. Papers that emphasize the dynamic interactions that produce the aurora are especially encouraged for this session.

Convener: R. L. Lysak, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN, 55455, USA; tel +1-612-625-1323; fax +1-612-626-2029; e-mail: bob@aurora.space.umn.edu
Co-conveners: R. E. Ergun, Laboratory of Astrophysics and Space Physics, University of Colorado, USA; G. Marklund, Alfvén Laboratory, Royal Institute of Technology, Sweden

GAIII03 Magnetic reconnection: conditions and mechanisms

Since the open magnetosphere model was proposed a wealth of research has provided evidence to show that magnetic reconnection plays a critical role in geospace and that it is the dominant means by which solar wind energy is transferred to the magnetosphere and ionosphere. But the accurate prediction of when, where, how and at what rate reconnection will occur still remains elusive. Papers addressing these issues, in any region of the magnetosphere, are welcome; those that combine observations (from spacecraft or ground-based) with theory/modelling are strongly encouraged. Such papers might examine the relative roles of anti-parallel vs. component merging or the key mechanisms occurring in the diffusion region.

Convener: M. Pinnock, British Antarctic Survey, High Cross, Madingley Rd., Cambridge CB3 0ET, UK; tel +44 1223 221534; fax +44 1223 221534; e-mail: mpi@bas.ac.uk
Co-conveners: M. Øieroset, Space Sciences Laboratory, University of California, Berkeley, USA; M. Shay, Institute for Research in Electronics and Applied Physics, University of Maryland, USA.

GAIII04 Structure and dynamics of the magnetopause and its boundary layers

The structure and dynamics of both the low- and high-latitude magnetopause and its associated boundary layers are the focus of much active interest as these are the prime sites of mass, momentum and energy transfer from the solar wind into the magnetosphere. In situ and remote sensing observations of these regions continue to be returned from a number of ongoing spacecraft missions, such as Polar, Cluster and Image. These observations are being supplemented by new datasets, such as those from the DoubleStar spacecraft, and are further supported by observations from ground based observatories and the results of MHD, hybrid and kinetic simulations.

We welcome contributions on a wide range of magnetopause related topics, including observations of the structure of the magnetopause current layer, its boundary layers and their transient variations, the signatures of the various forms of plasma interactions, such as magnetic reconnection, at the magnetopause and their relevance to solar wind magnetosphere coupling, and the interaction of solar wind disturbances with the magnetosphere. Multi-spacecraft and/or ground based observations which relate the magnetopause signatures to phenomena observed inside the magnetosphere or in the ionosphere are particularly welcome, as are modelling and simulation studies which complement the observations or allow them to be placed in a more global context

Convener: C.J. Owen, Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK ; tel +44 1483 204281; fax +44 1483278312; e-mail: cjo@mssl.ucl.ac.uk
Co-conveners: P. Escoubet , ESA,France; J. Berchem, UCLA,USA; Z.-X. Liu, CSSAR, China

GAIII05 Physics of substorms and current sheet in the near-Earth and mid-tail region

Thanks to new instruments on board GEOTAIL, POLAR and WIND, much progresshas been made recently on the dynamics of the thin current sheets developing in the central region of the geomagnetic tail. More recently, multi-satellite missions have provided major advances via the new observational capabilities such as those now available on Cluster. At thetime of the symposium the Cluster tetrahedron will have successively explored a range of scales (from 200 to 10000 km inter-spacecraft separations). The symposium provides a forum for discussion of the relevant scales for current sheet dynamics and identification of key issues to be addressed with future multipoint missions (MMS, THEMIS, SCOPE....). Contributions on dynamics of thin current sheets and their relation to substorms are solicited. Priority will be given to near Earth and mid-tail regions.

Convener: A. Roux, CETP/UVSQ 10-12 Avenue de l'Europe, 78140 Vélizy, France; tel +33 1 39 25 48 99; fax +33 1 39 25 48 87; e-mail: alain.roux@cetp.ipsl.fr
Co-conveners; T. Nagai, Tokyo Institute of Technology, Japan; C. Cheng, Princeton University, USA

GAIII06 Magnetosphere-ionosphere coupling dynamics

The dynamical evolution of magnetosphere-ionosphere systems is closely related to processes that mediate the exchange of mass, momentum, and energy. Energetic particle fluxes, currents, and Poynting flux associated with magnetospheric flows, plasma populations, and waves carry energy from the magnetosphere into the ionosphere. These dynamical processes can modify ionospheric conductivity and ionospheric current systems; excite plasma instabilities; and dissipate energy through collisional and wave-induced heating processes. Moreover, ionospheric modifications feed back on the magnetosphere through alteration of the current system, radiation/reflection of waves, outflow of plasma, and development of parallel electric fields to maintain quasineutrality. This symposium will focus on the following broad topics:(a) how do magnetospheric flows and current systems evolve when coupled to the ionosphere?, (b) what is the temporal evolution of the global ionospheric current system in the context of M-I coupling? (c) what are the processes involved in plasma inflow/outflow and how do they couple the magnetosphere and ionosphere?, and (d) what role do waves and plasma instabilities play in M-I coupling?

Convener: J. R. Johnson, Princeton University, Plasma Physics Laboratory, Princeton, NJ 08543, USA; tel +1-609-243-2603; fax +1-609-243-2662; email: jrj@pppl.gov
Co-conveners: A. Yoshikawa, Kyushu University, Japan; S. Wing, Applied Physics Laboratory, USA.

GAIII07 Geomagnetic disturbances, storms and radiation belts

Storms and other geomagnetic disturbances are manifestations of enhanced solar wind - magnetosphere coupling, whose effects can be detected as configurational changes and high temporal variability especially in the inner magnetosphere. Solar wind disturbances and southward-oriented interplanetary magnetic field enhance the ring current and radiation belts, distort and disturb the electromagnetic fields, and strongly increase the ionosphere - magnetosphere interaction. This session concentrates on the details of the driver - response relationship, e.g., on the enhancement of the radiation belt electron fluxes, acceleration and decay of the ring current, and the interplay between magnetotail dynamics and the evolution of the inner magnetosphere in response to the solar wind driver. Papers addressing these questions using ground-based and space-borne observations, modeling and simulation techniques, or theoretical analysis are all welcome.

Convener: T. I. Pulkkinen, Finnish Meteorological Institute, POBox 503, FI-00101, Helsinki, Finland, tel. +358-9-19294654, fax +358-9-19294603, e-mail: tuija.pulkkinen@fmi.fi
Co-conveners: R. B. Horne, British Antarctic Survey, UK; M. G. Henderson, Los Alamos National Laboratory, USA.

GAIII08 Global scale synthesis from models and distributed observations

The dramatic and ongoing improvements in both ground-based and space based observational capabilities are being motivated and facilitated in a number of ways. Technological advancements in data storage, retrieval, and communications, new space-based imagning techniques, and ever more cost effective and efficient sensors make collecting more data from more platforms, and the integration of that data into the framework of worldwide virtual arrays an increasingly easy task. Advances in data mining, visualization, and analysis make utilizing these large data sets a manageable though challenging task. The international modeling community, motivated by numerous programs such as CAWSES, GEM CEDAR, ILWS and others, are constantly improving the capacity to integrate data from disparate types of instruments and the assimilation of the resulting product into physical and empirical models. Finally, the practical needs to build predictive physical models for space weather forecasting have led to programs that target specific science questions, and now more than ever needs global data for closure of those science questions.

This symposium will highlight activity relevant to global ground-based and space based data and global models. In particular, we will focus on synoptic observations provided by Mesoscale and global arrays of space science instrumentation, and the integration of these data to provide as complete as possible a specification of the spatio-temporal evolution of the magnetosphere and of ionospheric electrodynamics and precipitation. Together with this observational theme, we will explore the closely related global models, and the assimilative use of data in these models to improve the accuracy of global simulations of actual events.

Convener: E.F. Donovan, Department of Physics and Astronomy, University of Calgary, Calgary, Canada, T2N 1N4; tel +1-403-220-6337; fax +1-403-289-3331; e-mail: eric@phys.ucalgary.ca
Co-conveners: M. Lester, Department Physics and Astronomy, University of Leicester, UK; R. Clauer, Space Physics Research Lab., Univ. of Michigan, USA

GAIII09 Plasma sources, sinks, and transport

This session is devoted to the study of the magnetospheric plasma sources, sinks, energization, and transport using experimental and simulation means. The ionosphere and the solar wind are considered as sources of equal importance. Either one is capable of supplying the observed magnetospheric plasma over a broadband of energy spectrum. Plasma is transported into the magnetosphere from these sources through a variety of mechanisms. The ionosphere supplies plasma through the polar wind, the cleft ion fountain, the auroral region, the cusp ionospheric foot point, the polar cap and the plasmaphere. The solar wind sources are the high latitude cusp, the polar rain, the plasma mantle, the low latitude boundary layer, the distant tail. Furthermore, observations indicate that a boundary layer of magnetosheath- like plasmas can be found just inside all regions of the magnetopause including the nightside equatorial magnetopause. And observations within the magnetotail lobes tend to indicate that plasma continues to enter the magnetotail throughout its entire length.

This session also deals with the wide variety of processes involved in the coupling of energy from the solar wind to the (extended) ionosphere, which produces heating and acceleration of ionospheric ions and electrons and the transfer of solar wind mass into the magnetosphere, the escape of magnetospheric particles into the magnetosheath, and the transport of plasmaspheric material to the Mantle, LLBL and plasma sheet.

The processes of plasma transport and losses are also relevant to this session, including transport in the distant tail, escape of particles through the flanks and plasma flow out of the distant tail, chaotic scattering and acceleration, fast plasma flows in the plasma sheet, formation of the ring current and radiations belts, as well as losses by charge exchange, wave-particle interactions, coulomb collisions.

Convener: J.-A. Sauvaud, CESR, B.P. 4346, 9, Avenue Colonel Roche, F-31029, France; e-mail: Jean-Andre.Sauvaud@cesr.fr
Co-conveners: K. Seki, STEL, University of Nagoya, Japan; T.E. Moore, Goddard Space Flight Center, USA; V. Sergeev, University of St Petersburg, Russia

GAIII10 Characterizing and forecasting space environment hazards

A key task of the space physics community in the space weather efforts is to provide reliable forecasting schemes for hazardous conditions based on up-to-date scientific understanding of space weather phenomena. At the same time the community running space weather-sensitive systems needs to collect accurate information about various hazards from the relatively unharmful to the really serious. Finally these two approaches have to be put together in order to issue scientifically sound warnings with grading of the severity of the expected problems. To this symposium we solicit contributions on various methods of forecasting space environmental conditions that are hazardous to both space-borne and ground-based systems and on studies of actual hazards and their relationships to the environmental conditions.

Convener: H.E.J. Koskinen, University of Helsinki, Department of Physical Sciences,
P.O.Box 64, FIN-00014 University of Helsinki, Finland; tel +358 9 191 50675; fax +358 9 191 50610; e-mail: Hannu.Koskinen@fmi.fi
Co-convener: R.L. McPherron, UCLA, USA

GAIII.11 Spacecraft-plasma environment interactions

Active and passive spacecraft systems interact with the plasma environment via various processes which may lead to changes of electrostaticpotential,electrical currents, induced plasma, sparks, torques and forces. On one hand these effects can be a limiting factor for certain space plasma measurements and for the operation of space systems. On the other hand, they can be exploited to control the electrostatic environment, generate thrust and power or to investigate new classes of plasma phenomena in space. Topics to be covered include, but are not limited to, spacecraft electrostatic sheath, spacecraft charging, in-flight plasma instrument calibration and data correction, spacecraft borne particle emitters, tether systems, artificial magnetospheres, active plasma devices and experiments in space.

Convener: Alain Hilgers, ESA-ESTEC, 2200AG Noordwijk, The Netherlands; e-mail: Alain.Hilgers@esa.int
Co-convener: Andrew Coates, Mullard Space Science Laboratory, UK.

GAIII12 Monitoring and specification of magnetospheric dynamics using ULF waves

Magnetospheric disturbances such as geomagnetic storms and substorms generate ULF waves, which are detected both on the ground and in space. Through observation of the waves we can monitor the changes of configuration of the magnetosphere and the associated energy and mass transport processes. In the context of space weather programs there is increased need for monitoring the magnetosphere continuously and with great accuracy. This symposium focuses on detection and interpretation of ULF wave signals in relation to the dynamic behavior of the magnetosphere. Papers describing recent development in ground-based multipoint measurements, radar and optical remote sensing techniques, ground-satellite conjunction observations, and calibration of ULF wave techniques against global simulations and satellite-based global images are encouraged for the symposium.

Convener: Kazue Takahashi, Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723-6099, USA; tel.+1-240-228-5782; fax +1-240-228-0386; e-mail: kazue.takahashi@jhuapl.edu
Co-convener: Colin Waters, School of Mathematical and Physical Sciences, University of Newcastle, Australia

GAIII13 Fundamental processes: lessons from other magnetospheres

While the terrestrial magnetosphere shares many common features with planetary magnetospheres, it is their differences we propose to highlight with reports in this session. Our focus will be on lessons learned from remote and in situ investigations of Jupiter and Saturn that impact our understanding of Earth's magnetosphere and perhaps suggest broader themes relevant to astrophysical systems. Given that planetary magnetospheres can have satellites, rings, dust, and high densities of neutral gas imbedded deep within them, there is much to be gained in asking how processes of transport, auroral generation, and others are maintained in these different environments and which processes are unique only to Earth or to some planets. This session will provide a review of the theoretical, modeling, and data analysis results which emphasize a comparison with Earth. We suggest these ideas are topical for the upcoming Messenger and BepiColombo missions to Mercury and the Pluto/Kuiper Belt Missions.

Convener: J. Woch, Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany; tel. +49 5556 979447; fax +49 5556 979240; e-mail: woch@linmpi.mpg.de
Co-conveners: C. Paranicas, Johns Hopkins University Applied Physics Laboratory, USA; R. J. Walker, Institute of Geophysics & Planetary Physics, University of California at Los Angeles, USA.

GAIII14 Reporter reviews

This session is composed of talks reviewing important topics from the research areas covered by Division III.

Convener: M. Fujimoto, Tokyo Institute of Technology, Department of Earth and Planetary Sciences, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 Japan; tel +81 3-5734-3535; fax +81 3-5734-3537: e-mail: fujimoto@geo.titech.ac.jp

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