Lydie Sichoix
University of French Polynesia
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Publication
Featured researches published by Lydie Sichoix.
Journal of remote sensing | 2014
J. Serafini; Jean-Pierre Barriot; Lydie Sichoix
The Island of Tahiti (French Polynesia) has a complex meteorological context governed by the South Pacific convergence zone on a large scale and the topography of a high volcanic island on the orographic scale. The island is subject to heavy rainfall (up to 8000 mm year–1 in some areas), mainly during the rainy season (November to April), generating significant geo-morphological changes and property damage each year. To better understand the underlying complex mechanisms leading to precipitation over a broad range of timescales (from hourly to seasonal), we have analysed eight years of data (2001–2008) coming from five sources: a radiometer, radiosoundings, a GPS, Era-Interim reanalysis, and two rain gauges, all located close to or inside the Matatia valley, a small typical Tahitian valley. In particular, we have decomposed the precipitable water distribution into two statistical distributions corresponding to the dry and wet seasons. The time evolution of precipitable water in the dry season is characterized by a log-normal distribution, while the precipitable water time evolution in the wet season is characterized by a reverse log-normal distribution. The bimodality of the probability distributions describing the dynamical processes involved in the Tahiti climate is confirmed by the study of the diurnal evolution in absolute humidity, precipitable water, and precipitation.
Journal of Marine Science and Technology | 2012
Jean-Pierre Barriot; Jonathan Serafini; Lydie Sichoix; Dominique Reymond; Olivier Hyvernaud
We present here the network of tide gauges spanning French Polynesia, and the set of records made by this network of the tsunami wave of March 11, 2011 (Tōhoku earthquake). We also outline the least-squares procedure used to separate the tsunami signal from the oceanic tides signal.
Remote Sensing of the Atmosphere, Clouds, and Precipitation IV | 2012
Jonathan Serafini; Jean-Pierre Barriot; Marania Hopuare; Lydie Sichoix; Abdelali Fadil
The integrated precipitable water vapor (IPW) is characterized by strong spatial and temporal variability, especially over tropical regions where the troposhere is not purely in hydrostatic equilibrium (convection). As an evidence, the survey of water vapor distibution as permanently as possible is an important issue and should serve as inputs for tropical climate modelling. In this paper, we present an estimation of the IPV from ground ba,.sed GPS receivers, which we compare to radiosondes and microwave radiometer. The data used here were collected in the vicinity of French Polynesia University site, during eight years from 2001 to 2008. In addition, we also include the IPW calculated using Era-Interim reanalyses (ECMWF). The main purpose of this paper is to highlight precision, qualities and limitations of each method available on the Island of Tahiti. During wet periods, the radiosondes vertical profiles of water vapor show an efficient mixing of water vapor between the the boundary layer (below trade winds inversion at Tahiti) and the free troposphere. Thus the rainy event detection allows to better constrain the validity range of a model of the vertical distribution of water vapor, which is based on a pseudo-adiabatic saturated evolution of the temperature.
Comptes Rendus Geoscience | 2011
Abdelali Fadil; Lydie Sichoix; Jean-Pierre Barriot; Pascal Ortega; Pascal Willis
Earth, Planets and Space | 2015
Hsuan-Chang Shih; Cheinway Hwang; Jean-Pierre Barriot; Maxime Mouyen; Didier Lequeux; Lydie Sichoix
E3S Web of Conferences | 2016
Lucie Pheulpin; Alain Recking; Lydie Sichoix; Jean-Pierre Barriot
Open Access Library Journal | 2016
Jean-Pierre Barriot; Jonathan Serafini; Keitapu Maamaatuaiahutapu; Lydie Sichoix
Archive | 2016
Jean-Pierre Barriot; Jonathan Serafini; Keitapu Maamaatuaiahutapu; Lydie Sichoix
Archive | 2010
Frank Q. Ye; Lydie Sichoix; Jean-Pierre Barriot; Jonathan Serafini
Archive | 2010
Jean-Pierre Barriot; Jonathan Serafini; Lydie Sichoix; Mehdi Benna; Wlodek Kofman; Alain Herique