A5067335548- Oceanographic and Atmospheric Processes
- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies
- Climate variability and models
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Pacific and Southeast Asian Studies
- Tropical and Extratropical Cyclones Research
- Ocean Acidification Effects and Responses
- Island Studies and Pacific Affairs
- Coastal and Marine Dynamics
- Ocean Waves and Remote Sensing
- earthquake and tectonic studies
- Seismic Waves and Analysis
- Maritime and Coastal Archaeology
- Seismic Imaging and Inversion Techniques
- Geophysics and Gravity Measurements
- Wind and Air Flow Studies
- Echinoderm biology and ecology
- Climate Change, Adaptation, Migration
- Solar Radiation and Photovoltaics
- Wind Energy Research and Development
- Marine and environmental studies
- Aquatic and Environmental Studies
University of French Polynesia
2002-2022
Ecosystèmes Insulaires Océaniens
2015-2018
Architecture, Territoire, Environnement
2006
University of the South Pacific
1998
The drifting Fish Aggregating Devices (dFADs) are fishing gears that not used by fishermen in French Polynesia which Exclusie Econimic Zone (EEZ) occupies an area of about 5 million square kilometer. More and more dFADs from foreign purse seiner vessels found EEZ as reported fishermen. Some them drift through the leave but some strand on islands before damaging coral reef may be introducing new species collected during their journey. After attempt to count stranded islands, we realize it is...
This systematic study of the subtropical mode waters in South Atlantic is based on hydrological data (the basin‐wide Ventilation Experiment, Oceanus, and Ajax sections, World Ocean Circulation Experiment (WOCE) sections Brazil‐Malvinas Confluence region), WOCE expendable bathythermograph set, atmospheric forcing produced by National Centers for Environmental Prediction reanalysis. The main ventilation window gyre lies southwest corresponds to southern part recirculation region overshoot...
Chlorophyll a in the Marquesas islands has been analyzed for period 1997–2002 as well simultaneous sea surface height anomaly, temperature, wind and rainfall. For first time, seasonality of phytoplankton blooms is shown around Islands. Clearly, data show three types this area: seasonal blooms, episodic ones, La Niña (related bloom). Initiation due to island mass effect explained by dynamic interaction circulation topography. The are strongly correlated with total (Ekman plus geostrophic)...
Research Article| November 01, 2002 Arago Seamount: The missing hotspot found in the Austral Islands Alain Bonneville; Bonneville 1Centre National de la Recherche Scientifique, Géosciences Marines, Institut Physique du Globe, 4 place Jussieu, Paris, France Search for other works by this author on: GSW Google Scholar Raymond Le Suavé; Suavé 2Centre Département Français pour l'Exploitation Mer, BP 70, 29280 Plouzané, Laurence Audin; Audin 3Université Paul Sabatier, le Développement, 38, rue...
A multiparameter analysis is applied on zonal and meridional hydrographic sections obtained for the South Atlantic Ventilation Experiment (SAVE) to determine spreading mixing of water masses in Ocean, focusing our interest large‐scale flow intermediate deep waters. The method utilizes all information from data set including temperature, salinity, dissolved oxygen, nutrient fields. Mixing proportions are quantified plotted along eight considered. Results show no evidence a primary route...
A quantitative analysis of water masses in the Brazil‐Malvinas Confluence zone is performed with a least squares multiple tracer using data from confluence winter 1989 cruise. The purpose to find mixture source types that best describes composition given sample. This method valuable regions involving strong mixing among various types, as zone. Seven main core layers are identified this region, and all retained for analysis: Thermocline Water (TW), Subantarctic Surface (SASW), Antarctic...
A temporary network of 10 broad-band seismic stations has been installed in French Polynesia for the Polynesian Lithosphere and Upper Mantle Experiment (PLUME). All were either on volcanic islands or atolls various archipelagos a manner which complements geographic coverage provided by regional permanent stations. The primary aim PLUME is to image upper mantle structures related plate motion hotspot activity. However, because its proximity all sites, ocean responsible high level noise data...
Geostrophic transports of the western boundary currents at Brazil/Malvinas Con uence in South Atlantic Ocean are estimated from data set 3 cruise (February 1990) with a nonlinear inverse model which takes into consideration density, current meter and wind data, dynamical (planetary vorticity, Ekman, mass conservation) constraints.Inversions carried out two initial different levels no motion 1500 m (Case A) 3000 B).Consistenciesof water volume provided by both inversions analyzed compared to...
The oceanic circulation in French Polynesia, central South Pacific, is investigated based on a high‐resolution model validated with satellite data. We focus the upper 500 m, where ocean current variability has been barely documented due to lack of situ measurements. Seasonal and El Niño–Southern Oscillation 1997–1999 surface subsurface currents are characterized. In north, Equatorial Current (SEC) follows seasonal cycle winter enhancement corresponding trade wind strengthening. During...
The Confluence 3 cruise during February 1990 provides the first hydrographic survey of Brazil‐Malvinas region ever obtained with such a refined spatial resolution over continental slope. closely spaced stations on slope permit observation branching Malvinas Current near 40°S. eastern branch returns south, while one is squeezed along slope, managing to continue northward as far north 36.3°S. (B‐M) front has north‐south orientation and an east‐west direction offshore. B‐M marked by very strong...
Abstract A remarkable chlorophyll‐a concentration (Chl, a proxy of phytoplankton biomass) plume can be noticed on remotely sensed ocean color observations at the boundary separating equatorial mesotrophic from subtropical oligotrophic waters in central South Pacific Ocean. This prominent biological feature is known as island mass effect Marquesas archipelago. Waters surrounding these islands present high macronutrient concentrations but an iron depletion. In this study, origin Chl...
In order to achieve France’s goal of carbon neutrality by 2050, the French Polynesian administration has set objective producing 100% local electricity requirements from renewable energy resources. To this end, we present wind characteristics at six selected locations in Tahiti. Surface observations 2008 2020 obtained Meteorological Service Polynesia are analysed terms speed, dominant direction and power density identify most suitable for deployment farms. The Weibull distribution is used...
The ventilation of the main thermocline associated with formation Subtropical Mode Water (STMW) and Subantarctic (SAMW) within Brazil/Malvinas Confluence region is investigated using satellite data, hydrographic dissolved CFCs as transient tracers. During winter 1994, two types STMW were observed. Both types, 26.24 σ θ 26.46 formed warm pool South Atlantic Central (SACW). SAMW found on 27.10 density surface. This surface lies in minimum salinity layer Antarctic Intermediate (AAIW). mode...
The Island of Tubuai (Australs Archipelago, South Pacific) was directly hit by the tropical cyclone (TC) Oli on February 5 th , 2010.For first time an island in French Polynesia, we have been able to monitor progress and impact TC as revealed meteorological, GPS sea level pressure data.TC is one most intense cyclones that crossed Polynesia evidenced dropped 957 hPa associated with wind gusts exceeding 180 km/h.Precipitable water series deduced from data shows maximum occurred when Tubuai, at...
Abstract. The South Pacific Subtropical Gyre (SPSG) is a vast and remote area where large uncertainties on variability in phytoplankton biomass production remain due to the lack of biogeochemical situ observations. In such oligotrophic environments, ecosystems are predominantly controlled by nutrients depletion surface waters. However, this character can be disturbed vicinity islands enhancement biological activity known occur (i.e. island mass effect, IME). This study mainly focuses...
The South Pacific Tropical Upper Tropospheric Trough (TUTT) is an elongated trough that appears in summer monthly averaged maps of the upper tropospheric flow over ocean. We provide first comprehensive description TUTT and analyze its impact on regional climate with 42 yr (1979-2020) data from ERA5, radiosonde, rain, keraunic data, lightning flash rate Optical Transient Detector-Lightning Imaging Sensor. confirm presence along a southeast-northwest axis November to May. Located between 100...