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The geopotential / F. Peng (1989)

Public Titre : The geopotential : modeling techniques and physical implications with case studies in the South and East China sea and Fennoscandia Type de document : Monographie Auteurs : F. Peng, Auteur Editeur : Uppsala : Uppsala University Année de publication : 1989 Collection : Acta Universitatis Upsaliensis, ISSN 0356-6485 num. 25 Importance : 146 p. Format : 17 x 24 cm ISBN/ISSN/EAN : 978-91-554-2365-0 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Géodésie physique [Termes IGN] anomalie de pesanteur [Termes IGN] Chine, mer de [Termes IGN] croute terrestre [Termes IGN] Fennoscandie [Termes IGN] géoïde local [Termes IGN] gradiométrie [Termes IGN] harmonique sphérique [Termes IGN] lithosphère [Termes IGN] marge continentale [Termes IGN] modèle de géopotentiel [Termes IGN] potentiel de pesanteur terrestre Index. décimale : MX Mémoires divers Résumé : (Auteur) Modeling techniques and physical implications of the geopotential are examined in terms of the methods for determining the geopotential and the application of the methods to geophysical problems. Emphasis was given to the modem space methods especially SST (satellite-to-satellite tracking) and satellite gradiometry, which will become the major geopotential modeling techniques in the future. Satellite altimetry observations are used to obtain geoid anomalies for studies of lithospheric structures in selected continental margin and trench areas. The anomalous potential over a trench is interpreted in terms of a lithosphere subduction model. The positive anomalies at the landward flank of the Ryukyu Trench are partly explained by the density variations due to the subduction related thermal structure. The anomalous potential over passive continental margins is interpreted as the consequence of the deflected Moho in response to topographic surface loads. The influence of crustal structure on the anomalous potential over Fennoscandia was investigated. High correlation between the geoid anomaly and crustal thickness at intermediate wavelengths is found, supporting the argument that the crust-mantle boundary contributes significantly to the anomalous potential. Experimental results of geoid determination in the northern part of Fennoscandia using a satellite positioning technique are presented. Gravity gradients at a height of 160 km over Fennoscandia are simulated in order to examine the sensitivity requirement and recoverability of SST or satellite gradiometry. Attention is drawn to the problems in relation to the geopotential modeling and interpretation, including the notion of wavelength in spherical harmonic analysis/synthesis, and the relation between the total disturbed potential and the contributions from individual sources in the wavelength domain. Numéro de notice : 18235 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Monographie Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=55357

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
18235-01	MX	Livre	Centre de documentation	En réserve Mezzanine	Disponible