IAGA in Toulouse - Division II Symposium
IDII01 Low latitude atmosphere - ionosphere - magnetosphere coupling, dynamics and energetics (including small scale coupling) (Divisions II and III)
This symposium will address recent results on the dynamics and energetics governing the atmosphere- ionosphere- magnetosphere- interplanetary coupling processes of the equatorial region. Upward transport of wave energy and momentum due to gravity, tidal and planetary waves from below and extra-tropics control the phenomenology of the equatorial atmosphere -ionosphere system. The observed large zonal, day-to-day and interannual variability in the system dynamics stems from these processes, while large variability arises also from magnetospheric/interplanetary forcing through disturbance electric fields and energy deposition at high latitudes with the consequent coupling to equatorial latitudes. The objective is to better understand the possible causes of these variabilities on different time scales, and in function of longitude. Results will be welcome from ground based and satellite borne experiments, and from modeling/theoretical investigations, on the dynamics, electro dynamics, manifestations of coupling process in terms of small and larges structures, and variabilities in winds, temperatures, waves, plasma drifts, electric fields and currents, in general, and especially, those related to the major phenomena of the region: Equatorial plasma bubbles/Spread F, Electrojet and Ionization Anomaly.
Convener: M. A. Abdu, Instituto Nacional de Pesquisas Espaciais - INPE,Ave. dos Astronautas 1758; 12201 970, São Jose dos Campos, SP, Brazil; tel +55 12 345 6797; fax +55 12 345 6990; e-mail: abdu@dae.inpe.br
Co-conveners: Takuji Nakamura, Radio Science Center for Space and Atmosphere (RASC), Kyoto University, Japan; B. T. Tsurutani, Jet Propulsion Laboratory, USA
IDII02 Conjugate and interhemispheric polar studies (Divisions II, III and V)
The Earth's magnetosphere is an electrodynamic system that couples the northern and southern polar ionospheres, each with different geophysical and electrodynamic properties. The unique physical characteristics of the northern and southern polar regions must be considered in models of the fully coupled, global, dynamic geospace system. For example, the separation of geomagnetic and rotation poles, magnetic field strength, and conductivity structures are different in the two polar regions. Further, the solar wind electrodynamic coupling to the northern and southern hemispheres can be very different depending upon the orientation of the interplanetary magnetic field (IMF). New instrument arrays in both hemispheres and the possibility of simultaneous auroral imaging from satellites over both polar regions provide new tools and opportunities to investigate interhemispheric coupling. This symposium solicits the results from research that contrasts and/or considers the coupled, interhemispheric, global system, including consideration of when the two polar ionospheres may not be coupled. Results from observational, theoretical and computer simulation investigations are welcome.
Convener: C. R. Clauer, University of Michigan, Center for Space Environment Modeling,2455 Hayward, Ann Arbor, MI 48109-2143, USA; tel +1-734-476-6248; fax +1-734 763-0437; rclauer@umich.edu
Co-conveners: A. S Rodger, British Antarctic Survey, U.K.; M. Freeman, British Antarctic Survey, U.K.; H. Yamagishi, National Institute for Polar Research, Japan; V. Pilipenko, Institute of the Physics of the Earth, Russia
IDII03 Space weather effects on the ionosphere (Division II and IDCDC)
Space weather studies have become important due to the adverse effects on satellites and disruptions in radio communications caused by severe scintillation associated with some of such events occurring in solar terrestrial system. Anomalies in electron density distribution may also lead to errors in satellite based navigation. The session will highlight the effect of space weather events on ionosphere at low, middle and high latitudes. Studies dealing with the charged particle precipitation at high latitudes and in the region of south Atlantic Magnetic Anomaly will also be covered. The session will also cover magnetosphere-high latitude-low latitude coupling under geomagnetic quiet and disturbed conditions. Contributions on the space weather effects on thermosphere at different latitudes are also welcome.
Convener: H Chandra, Physical Research Laboratory, Navarangpura, Ahmedabad 380 009, India; tel +91-79-26302129 ext. 4556; fax +91-79-26301502;e-mail: hchandra@prl.ernet.in
Co-convener: Santi Basu, Air Force Research Laboratory, Hanscom AFB, USA
IDII04 Electrodynamic processes in the equatorial and low latitudes: Coupling with the global system (Division II and IDCDC)
Theoretical as well as experimental contributions related to electrodynamic processes which play important roles in the transfer of energy to and from the equatorial and low latitude ionospheric regions and in the generation of plasma irregularities in these regions are welcome. Special emphasis will be given to contributions that deal with the coupling of these processes with the large scale global system of fields and currents.
Convenor: Dr. P. Muralikrishna, Instituto Nacional de Pesquisas Espaciais - INPE, C. P. 515, 12 201-970, São José dos Campos-SP, Brazil; tel. +55 12 3945 7148 ; fax: +55 12 3945 6990; e-mail: murali@dae.inpe.br
Co-convenor: Dr. Archana Bhattacharya, Indian Institute of Geomagnetism, Mumbai, INDIA
GAII01 Electrical energy deposition processes in the middle and upper atmosphere
This session is intended to investigate the processes, which deposit electrical energy in the middle and upper atmosphere, and their consequences on the local, regional and global scale. Topics of particular interest are transient luminous events such as sprites, elves and jets, and their environmental initiation conditions. For example, thunderstorm development, lightning activity, gravity- and planetary waves, and the atmospheric conductivity. Consequences of interest are atmospheric chemical composition changes, ionospheric modification, infrasonic wave generation, troposphere/ionosphere coupling and the impact on the global circuit.
Convener: M. Füllekrug, Institiut für Geophysik, Universität Frankfurt am Main, Feldbergstrasse 47, D-60323 Frankfurt am Main, Germany, tel: +49 69 798 23959, fax: +49 69 798 23280, email: fuellekr@geophysik.uni-frankfurt.de
Co-conveners: Fernanda T. São Sabbas, Aeronomy Division (DAE), Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, Brazil; Elisabeth Blanc, Laboratoire de Detection et de Geophysique, Comissariat a l'Energie Atomique (CEA), Bruyeres le Chatel, France.
GAII02 Planetary ionospheres and thermospheres
Planetary ionospheres and thermospheres constitute the outer layer of the planets' upper atmospheres through which they interact with their space environment. In the long term, these layers partly control the loss of chemical species and therefore the evolution of planetary atmospheres. All of these phenomena depend on a diversity of factors : planetary gravity, heliocentric distance, atmospheric/ionospheric species sources and losses, magnetic field intensity and geometry etc. Planetary exploration reveals this diversity in unprecedented detail. This symposium will welcome all contributions to new observations, interpretations and models of planetary thermospheres and ionospheres contributing to the exploration and improved underestanding of this diversity and of the underlying "universal" laws controling the planets' upper atmospheres. New results on the Mars, Saturn and Titan upper atmospheres provided by the Mars and Cassini/Huygens missions will be particularly welcome.
Convener: M. Blanc, Observatoire Astronomique Marseille Provence, 2 place Le Verrier, 13248 Marseille Cedex 04, France ; tel. + 33 4 95 04 41 59 ; fax + 33 4 95 04 41 58 ; e-mail : blanc@oamp.fr
Co-Conveners: H. Waite, Southwest Research Institute, USA; G. M. Keating, George Washington University, Virginia, USA
GAII03 Data assimilation techniques for the ionosphere-thermosphere-magnetosphere system
Over the past decade, data assimilation models have become a dominant tool for specifications and forecasts in meteorology and oceanography. However, in the field of space physics these models are only emerging, largely due to the lack of suitable data in the past. However, this situation is changing rapidly with the significant increase in the number of data that will become available over the next decade. This data, which will come from a variety of sources, will be available in real-time for assimilation into physics-based specification and forecast models. In order to adapt modern data assimilation techniques developed in meteorology and oceanography to the near-Earth space regimes, a rigorous examination of the statistical properties of the system is necessary. Papers dealing with data sources, data quality issues, and data assimilation models and techniques are welcome.
Convener: L.Scherliess, Utah State University, Center for Atmospheric and Space Sciences, Logan, UT 84322, U.S.A; tel. +01 435 797 7189; fax +01 435 797 2992; e-mail ludger@gaim.cass.usu.edu
Co-convener: T. Matsuo, National Center for Atmospheric Research, USA.
