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Author |
Georges J.Y. |
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Distribution en mer, sites d'alimentation et régime alimentaire du manchot royal. Relations avec les conditions oceanographiques autour des îles Crozet. |
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1994 |
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D.E.A des Sciences de l'Environnement marin |
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109 |
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1799 |
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Author |
Barnola J.M. |
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Title |
Our atmosphere over the last 400.000 years. |
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2000 |
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French IGBP-WCRP News letter |
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Fevrier |
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60-63 |
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355 |
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1803 |
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Tchistiakov V.K., Kracilev A., Lipenkov V.Y., Balestrieri J.P.H., Rado C. & Petit J.R. |
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Title |
Behavior of a deep hole drilled in ice at Vostok Station. |
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Journal Article |
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1994 |
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Mem. national inst. polar res. spec. issue |
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49 |
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247-255 |
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159 |
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1806 |
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Razouls S., De Bovee F., Delille D., Fiala M. & Mayzaud P. |
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Title |
Temporal variability of bacteria, phytoplankton and zooplankton assemblages of the sub-Antarctic Morbihan Bay (Kerguelen Archipelago). |
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1997 |
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Antarctic Communities: Species, Structures and Survival |
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86-92 |
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193 |
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1809 |
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Barraclough D.R., Williams L. & Quinn J.M. |
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Title |
US/UK candidates for the definitive geomagnetic reference field modelDGRF-85 and the predictive geomagnetic reference field model IGRF-90. |
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1992 |
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J. geomag. geoelectr. |
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44 |
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719-734 |
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139 |
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1826 |
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Dauncey M.J., Burton K.A., White P.A., Harrison A.P., Gilmour R.S., Duchamp C. & Cattaneo D. |
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Title |
Nutritional regulation of growth hormone receptor gene expression. |
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1994 |
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FASEB |
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8 |
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81-88 |
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131 |
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yes |
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1829 |
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Author |
Pourchet M., Furdada G. & Corbera J. |
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Title |
Determinación del 137 Cs en sondeos de hielo para el estudio del balance de masa del glaciar Hurd. |
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Conference - National - Article without Reading Comitee |
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1996 |
Publication |
VI Simposio Español de Estudios Antarticos |
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VI Simposio Español de Estudios Antarticos |
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254 |
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1839 |
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Author |
Andre R. |
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Title |
Etude des Structures Fines de la Convection Ionosphérique Observées par SuperDARN : Structures à Forte Divergence de Vitesse = Study of Fine Structures in the Ionospheric Convection Recorded by SuperDARN : Structure with High Velocity Divergence |
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1997 |
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Solar terrestrial relation ; Polar ionosphere ; Convection ; Radar observation ; Fine structure ; Scattering theory ; Analysis method ; Velocity distribution |
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Thèse de Dotorat, Université d'Orléans. Discipline: Physique des Gaz et des plasmas
La chaîne de radars à diffusion cohérente SuperDARN observe dans les régions polaires, les mouvements de convection du plasma ionosphérique qui sont induits par les interactions Soleil-Terre. Le premier objectif de ce travail est de mettre en place des outils permettant l'étude des structures fines se développant dans la convection ionosphérique. Deux thèmes complémentaires sont développés : – L'application d'une théorie de la diffusion collective permet d'extraire des paramètres (temps de cohérence, coefficient de diffusion) caractérisant la turbulence micro-échelle (L?15 m) donnant naissance au signal enregistré par les radars. On utilise ces paramètres pour séparer différents régimes de turbulence, pour mettre en valeur des zones de transfert d'énergie entre l'ionosphère et la magnétosphère. – La deuxième direction consiste à mettre en place une méthode d'analyse permettant de construire des cartes vectorielles de vitesses qui optimisent la résolution de base du radar (L?45 km). Une telle méthode doit faire face à des difficultés propres aux radars utilisés, à savoir une localisation incertaine de la mesure, introduite par l'utilisation d'une onde haute fréquence (HF), et une dépendance des vecteurs entre eux due à la forme des volumes analysés. Ces problèmes sont résolus par une étude détaillée sur la propagation des ondes HF et sur la localisation des mesures, puis par la mise en place d'une méthode d'analyse spectrale haute résolution performante qui augmente la quantité d'information déduite d'une seule donnée radar. Cette méthode de cartographie à haute résolution a permis de mettre en évidence dans les données SuperDARN, des structures caractérisées par une très forte divergence des vitesses, qui sont en contradiction avec l'hypothèse largement admise d'un mouvement sans divergence. L'ensemble des caractéristiques macro-échelles (45 km) et micro-échelles (15 m) de ces structures, conduit à une interprétation en termes de démagnétisation locale et temporaire des ions du plasma dans l'ionosphère aurorale. Cette étude se termine par la proposition de mécanismes capables de reproduire ces observations. |
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312 |
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Bachelor's thesis |
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1841 |
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Chapuis J.L. |
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Title |
Eradiquer les allogènes pour sauvere les indigènes. |
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1995 |
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Le st hubert |
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Août / Sep |
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57-62 |
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276 |
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1843 |
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Author |
Boulard V. |
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Traitement des données DIDD. |
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2000 |
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Projet de recherche, 2ème année de l'Ecole de Physique du Globe, Maîtrise de Sciences de la Terre |
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139 |
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