On equatorial geophysics studies: a review on the IGIRGEA results during the last decade.
In: ISSN: 1364-6826 ; Journal of Atmospheric and Solar-Terrestrial Physics ; https://hal.science/hal-00155769 ; Journal of Atmospheric and Solar-Terrestrial Physics, 2005, 67 (4), pp.301-313. ⟨10.1016/j.jastp.2004.10.001⟩, 2005
academicJournal
Zugriff:
During the years 1993–1994, a continuous campaign of measurements has been held in the frame of the International Equatorial Electrojet Year (IEEY) with a network of 10 magneto-telluric stations and a network of three ionosondes. Other instruments have participated during shorter periods, HF radar and optical Fabry-Perot 630 nm interferometer.After the IEEY campaigns, the International Group of Research in Geophysics in Europe Africa (IGRGEA created in January 1995), has organized the research in geophysics. This paper report the main results of the IGRGEA during the last decade at local, regional and planetary scales.At a local scale, the HF radar data highlighted the complex structure of echoes in the equatorial zone and allowed to explain the “necklace” echoes as due to oblique propagation into the type I instability levels. This radar observed atmospheric storm electric field discharges at Es layer for the daytime and Equatorial Spread F at night-time. A series of original results concern Doppler spectra and the electric field change on plasma drifts across the ionosphere, gravity waves effects as well the ESF multi-process sources.At a regional scale, magnetic data were used to parametrize the Equatorial Electrojet (EEJ). Ionospheric data, magnetic data and UARS satellite were brought together as input parameters of the Richmond's EEJ model to reproduce the EEJ and the magnetic field variations associated to EEJ. The comparisons between magnetic data, and the magnetic field computed from the physical model and from the parametrization of the EEJ are all in good agreement. Ionosonde data were included in the IRI. Ionosonde data revealed the field aligned f 0 F 2 crests of ionization at mid morning and early afternoon hours. Measurements of equatorial night-time wind variations, obtained for the first time over African equatorial zone with the Fabry-Perot interferometer, shown the strong variability of atmospheric winds.At a planetary scale, the parametrization of the EEJ was done using the magnetometers ...
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On equatorial geophysics studies: a review on the IGIRGEA results during the last decade.
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| Autor/in / Beteiligte Person: | Amory-Mazaudier, Christine ; Kobea, A. ; Vila, P. ; Achy-Seka, A. ; Blanc, E. ; Boka, K. ; Bouvet, J. ; Cecile, J. F. ; Cohen, Y. ; Curto, J. J. ; Dukhan, M. ; Doumouya, V. ; Fambitakoye, O. ; Farges, T. ; Goutelard, C. ; Guisso, E. ; Hanbaba, R. ; Hougninou, E. ; Kone, E. ; Lassudrie-Duchesne, P. ; Lathuillère, Chantal ; Leroux, Y. ; Menvielle, Michel ; Obrou, E. ; Ogunade, S.O. ; Onwumechili, C.A. ; Petitdidier, Monique ; Rees, D. ; Sambou, E. ; Sow, Moustapha ; Vassal, J. ; Centre d'étude des environnements terrestre et planétaires (CETP) ; Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) ; Laboratoire de Physique de l’Atmosphère Abidjan ; Université Félix Houphouët-Boigny (UFHB) ; Laboratoire de Détection et de Géophysique (CEA) (LDG) ; DAM Île-de-France (DAM/DIF) ; Direction des Applications Militaires (DAM) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) ; Institut de Physique du Globe de Paris (IPGP) ; Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) ; Observatori de l'Ebre (OE) ; Consejo Superior de Investigaciones Cientificas España = Spanish National Research Council Spain (CSIC)-Universitat Ramon Llull Barcelona (URL) ; Institut Français de Recherche Scientifique pour le Développement et la Coopération Scientifique ; Laboratoire Signaux et systèmes ; Conservatoire National des Arts et Métiers CNAM (CNAM) ; HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM) ; France Télécom Recherche et Développement Lannion (FTR&D) ; Télécom, France ; Laboratoire de Planétologie de Grenoble (LPG) ; Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) ; University of Obafemi ; Center for Atmospheric and Space Sciences Logan ; Utah State University (USU) ; Université Cheikh Anta Diop de Dakar Sénégal (UCAD) |
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| Zeitschrift: | ISSN: 1364-6826 ; Journal of Atmospheric and Solar-Terrestrial Physics ; https://hal.science/hal-00155769 ; Journal of Atmospheric and Solar-Terrestrial Physics, 2005, 67 (4), pp.301-313. ⟨10.1016/j.jastp.2004.10.001⟩, 2005 |
| Veröffentlichung: | HAL CCSD ; Elsevier, 2005 |
| Medientyp: | academicJournal |
| DOI: | 10.1016/j.jastp.2004.10.001 |
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