French contribution to polar gravimetry

• Main Authors: Mémin, Anthony, Rogister, Yves, Hothem, Roger L., Näränen, Jyri, Amos, Matt, O'Brien, J., Gentle, P., Wilson, Terry, Capra, Alessandro, Bernard, Jean-Daniel, Hinderer, Jacques
• Other Authors: Géoazur (GEOAZUR 7329), Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD France-Sud )-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Ecole et Observatoire des Sciences de la Terre (EOST), Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), United States Geological Survey Reston (USGS), Finnish Geospatial Research Institute (FGI), Land Information New Zealand (LINZ), School of Earth Sciences, Ohio State University, Dipartimento di Ingegneria Meccanica e civile, Modena e Reggio Emilia, Résif
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2019
• Subjects: RESIF; Gravimetry; Absolute gravimeter; Instrumentation; Gravimétrie; Gravimètre absolu; [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]; Arctic; New Zealand; Ross Sea; Svalbard; Terra Nova Bay; Terre Adélie; Terre-Adélie; Antarc*; Antarctica; Antarctique*; Mer de Ross
• Online Access: https://hal.archives-ouvertes.fr/hal-02416097; https://hal.archives-ouvertes.fr/hal-02416097/document; https://hal.archives-ouvertes.fr/hal-02416097/file/Memin-contribution-fr-gravimetrie-polaire.pdf

Four campaigns of absolute gravity (AG) measurements were carried out with the FG5 and FG5-X absolute gravimeters in the Ross Sea and Terra Nova Bay region of Antarctica, successively in 2009, 2011, 2015 and 2018. These campaigns are the result of collaboration between French, Finnish, Italian, New Zealand and American agencies and institutes, the 2009, 2011 and 2015 campaigns having been supported by the international POLENET (Polar Earth Observing Network) programme. Absolute gravity was also measured in Terre Adélie in 2000, 2006 and 2019. This poster shows the variations in gravity at different stations, also taking into account previous absolute gravity measurements made in the 1990s. Also presented are the two absolute gravity measurement campaigns carried out in the French southern lands, as well as the one carried out in the Arctic, at Ny-Alesund, Svalbard. This poster was presented at the Résif Scientific and Technical Meetings held in Biarritz in November 2019. Résif is a national research infrastructure dedicated to the observation and understanding of the Earth's internal structure and dynamics. Résif is based on high technology observation networks, composed of seismological, geodetic and gravimetric instruments deployed in a dense manner throughout the French territory. The data collected allow the study of ground deformation, surface and deep structures, local and global seismicity and natural hazards, particularly seismic, on the French territory with a high spatio-temporal resolution. Résif is integrated into the European (EPOS - European Plate Observing System) and worldwide instruments that allow to image the Earth's interior in its entirety and to study many natural phenomena. Quatre campagnes de mesures de la gravité absolue (AG) ont été réalisées avec les gravimètres absolus FG5 et FG5-X dans la région de la mer de Ross et de la baie de Terra Nova en Antarctique, successivement en 2009, 2011, 2015 et 2018. Ces campagnes sont le résultat de la collaboration entre des agences et instituts ...