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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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