FN Archimer Export Format
PT J
TI Densification of the Ground-Based GNSS Observation Network in the Southwest Indian Ocean: Current Status, Perspectives, and Examples of Applications in Meteorology and Geodesy
BT 
AF Bousquet, Olivier
   Lees, Edouard
   Durand, Jonathan
   Peltier, Aline
   Duret, Anne
   Mekies, Dominique
   Boissier, Patrice
   Donal, Thomas
   Fleischer-Dogley, Frauke
   Zakariasy, Lova
AS 1:1;2:1;3:1;4:2,3;5:4;6:1;7:2,3;8:4;9:5;10:6;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Laboratoire de l’Atmosphère et des Cyclones, UMR 8105 (Reunion University/Meteo-France/CNRS), Réunion Island, France
   Institut de Physique du Globe de Paris, Université de Paris, Paris, France
   Observatoire Volcanologique du Piton de la Fournaise, La Plaine des Cafres, France
   Institut National de l’Information Géographique et Forestière, Saint-Mandé, France
   Seychelles Islands Foundation, Mahé, Seychelles
   Institut Supérieur de Technologie d’Antisiranana, Antsiranana, Madagascar
C2 METEO FRANCE, FRANCE
   IPGP, FRANCE
   OBSERVATOIRE VOLCANOLOGIQUE DU PITON DE LA FOURNAISE, FRANCE
   IGN, FRANCE
   SEYCHELLES ISLANDS FND (SIF), SEYCHELLES
   IST ANTISIRANANA, MADAGASCAR
IN DOAJ
IF 2.892
TC 9
UR https://archimer.ifremer.fr/doc/00651/76324/77302.pdf
   https://archimer.ifremer.fr/doc/00651/76324/77303.docx
LA English
DT Article
DE ;Southwest Indian Ocean;GNSS - Global Navigation Satellite System;water vapor cycle;Madagascar;Mayotte;geodesy;NWP (numerical weather prediction);AROME Indian Ocean
AB In the frame of the research project IOGA4MET, a new ground-based GNSS network is being deployed in the Southwest Indian Ocean (SWIO) since November 2017. This new network opens up for new research opportunities in geodesics and atmospheric sciences in this area regularly exposed to natural hazards, and significantly expands the International GNSS System (IGS) network, which only includes eight stations so far in the SWIO. After a description of the current status of IOGA4MET, several examples of regional applications in meteorology (climatology and numerical modeling) and geodesy (monitoring of ground deformations) are presented using data collected in northern Madagascar and small neighboring islands in 2018–2020. The observed water vapor cycle is shown to exhibit different characteristics and important variability at all locations. At the seasonal scale, maximum IWV values are similar everywhere, minimum values decrease away from the equator and a sharp IWV gradient can be noticed during the wet–dry transition period. At this time scale, the seasonal IWV cycle analyzed with the high-resolution NWP system AROME-IO matches observations with little discrepancies. At the diurnal scale, IWV characteristics show different behavior on each side of Madagascar, which emphasizes the important role of this island in driving the regional circulation. Finally, examination of ground displacements measured by GNSS stations in relationship with the ongoing Mayotte seismic-volcanic crisis indicates that ground deformation associated with the current off-shore volcanic activity east of Mayotte does not extend up to 250 km, or is currently too low to be detected in very far field. 
PY 2020
PD SEP
SO Frontiers In Earth Science
SN 2296-6463
PU Frontiers Media SA
VL 8
IS 566105
UT 000573820600001
DI 10.3389/feart.2020.566105
ID 76324
ER

EF