A5040764190- Climate variability and models
- Tropical and Extratropical Cyclones Research
- Meteorological Phenomena and Simulations
- Ocean Waves and Remote Sensing
- Atmospheric aerosols and clouds
- Oceanographic and Atmospheric Processes
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
- Precipitation Measurement and Analysis
- Flood Risk Assessment and Management
- Climate Change, Adaptation, Migration
- Coastal and Marine Dynamics
- Turtle Biology and Conservation
- Physiological and biochemical adaptations
- Geological and Geophysical Studies
- Hydrology and Drought Analysis
- Marine and coastal ecosystems
- Marine animal studies overview
- Hydrology and Watershed Management Studies
- Aeolian processes and effects
Laboratoire de l'Atmosphère et des Cyclones
2011-2023
Météo-France
2011-2023
Centre National de la Recherche Scientifique
1999-2023
Observatoire des Sciences de l'Univers de la Réunion
2014
Laboratoire d'Aérologie
2011
Université du Québec à Montréal
2004-2009
Laboratoire de Météorologie Dynamique
2009
Ouranos
2004
University of Washington
2004
Oregon State University
2002
Abstract. This paper presents the Meso-NH model version 5.4. is an atmospheric non hydrostatic research that applied to a broad range of resolutions, from synoptic turbulent scales, and designed for studies physics chemistry. It limited-area employing advanced numerical techniques, including monotonic advection schemes scalar transport fourth-order centered or odd-order WENO momentum. The includes state-of-the-art parameterization are important represent convective-scale phenomena eddies, as...
Abstract. This study presents the principles of new coupling interface based on SURFEX multi-surface model and OASIS3-MCT coupler. As can be plugged into several atmospheric models, it used in a wide range applications, from global regional coupled climate systems to high-resolution numerical weather prediction or very fine-scale models dedicated process studies. The objective this development is build share common structure for atmosphere–surface all these involving one hand other ocean,...
Abstract Ocean‐Waves‐Atmosphere (OWA) exchanges are not well represented in current Numerical Weather Prediction (NWP) systems, which can lead to large uncertainties tropical cyclone track and intensity forecasts. In order explore better understand the impact of OWA interactions on modeling, a fully coupled system based atmospheric model Meso‐NH, oceanic CROCO, wave WW3 called MSWC was designed applied case Bejisa (2013–2014). The simulation shows good agreement with literature available...
The wind stress forcing of the Oregon coastal ocean during June–August 1999 is estimated from a regional mesoscale atmospheric model and satellite scatterometer observations, supplemented by moored surface data land‐based profiler. Both mean variable components alongshore increase factors 3–4 north to south along coast. There evidence orographic intensification near Cape Blanco, which supported previous aircraft ship observations August 1995. systematic southward will drive enhanced...
The international research program “ReNovRisk-CYCLONE” (RNR-CYC, 2017–2021) directly involves 20 partners from 5 countries of the south-west Indian-Ocean. It aims at improving observation and modelling tropical cyclones in Indian Ocean, as well to foster regional cooperation improve public policies adapted present future risk this cyclonic basin. This paper describes structure main objectives ambitious project, with emphasis on its observing components, which allowed integrating numbers...
Abstract. The STRAP (Synergie Transdisciplinaire pour Répondre aux Aléas liés Panaches volcaniques) campaign was conducted over the entire year of 2015 to investigate volcanic plumes Piton de La Fournaise (La Réunion, France). For first time, measurements at local (near vent) and regional scales were around island. has become possible thanks strong cross-disciplinary collaboration between volcanologists meteorologists. main observations during four eruptive periods (85 days) are summarised....
Abstract In order to contribute ongoing efforts on tropical cyclone (TC) forecasting, a new, convection‐permitting, limited‐area coupled model called AROME‐Indian Ocean (AROME‐IO) was deployed in the Southwest Indian basin (SWIO) April 2016. The skill of this numerical weather predicting system for TC prediction is evaluated against its coupling (European Center Medium Range Weather Forecasting‐Integrated Forecasting System [ECMWF‐IFS]) using 120‐hr reforecasts 11 major storms that developed...
A set of numerical simulations is relied upon to evaluate the impact air-sea interactions on behaviour tropical cyclone (TC) Bejisa (2014), using various configurations coupled ocean-atmosphere system Meso-NH-NEMO. Uncoupled (SST constant) as well 1D (use a ocean mixed layer) and 3D (full ocean) experiments are conducted oceanic response dynamic processes, with emphasis simulated structure intensity TC Bejisa. Although three shown properly capture track cyclone, spatial distribution sea...
During 2 January 2014, Cyclone Bejisa passed near La Réunion in the southwestern Indian Ocean, bringing wind speeds of 41 m s−1, an ocean swell 7 m, and rainfall accumulations 1025 mm over 48 h. As a typical cyclone to impact Réunion, we investigate how characteristics this could change response future warming via high-resolution, atmosphere–ocean coupled simulations Bejisa-like cyclones historical environments. Future environments are constructed using pseudo global method whereby...
Abstract The Convective and Orographically‐driven Precipitation Study (COPS) carried out in summer 2007 over northeastern France southwestern Germany provided a fairly comprehensive description of the low‐troposphere water‐vapour field, thanks particular to deployment two airborne differential absorption lidar systems. These observations were assimilated using 3D‐Var assimilation system Application Research Operations at MEsoscale (AROME) numerical weather prediction mesoscale model. was for...
The ReNovRisk-Cyclone program aimed at developing an observation network in the south-west Indian ocean (SWIO) close synergy with implementation of numerical tools to model and analyze impacts tropical cyclones (TC) present a context climate change. This paper addresses modeling part program. First, unique coupled system simulate TCs SWIO is developed. ocean–wave–atmosphere coupling considered along coherent between sea surface state, wind field, aerosol, microphysics, radiation. illustrated...
The Reunion Island experienced its biggest eruption of Piton de la Fournaise volcano during April 2007.Known as "the the century", this event degassed more than 230 KT SO 2 .Theses emissions led to important health issues, accompanied by environmental and infrastructure degradations.This modeling study uses mesoscale chemical model MesoNH-C simulate transport gazeous between 2nd 7th, with a focus on influence heat fluxes from lava.This required implementation reduced scheme, basic surface an...
Abstract Signatures of multiple stratospheric intrusions were observed on simultaneous and collocated ozone water vapor profiles retrieved by lidars radiosondes at the Maïdo Observatory, Reunion Island (21°S, 55°E, 2160 m above sea level), during MAïdo LIdar Calibration CAmpaign in April 2013. A singular structure vertical profile with three peaks (in excess 90 ppbv, ~8, ~10, ~13 km altitude) embedded a thick dry layer air suggested origins. The hypothesis is corroborated synoptic analysis...
Surface and sub-surface ocean temperature observations collected by sea turtles (ST) during the first phase (Jan-2019 – April 2020) of Sea Turtle for Ocean Research Monitoring (STORM) program are compared against in-situ satellite measurements, later relied upon to assess performance Glo12 model forecasts over west tropical Indian Ocean. The evaluation profiles STs collocated ARGO drifter measurements show good agreement, with imperceptible discrepancies at all sample depths (0-250m)....
Radial velocity measurements collected by the airborne radar RASTA during Hydrological Cycle in Mediterranean Experiment ( HyMeX) S pecial Observation Period SOP) 1 are used to assess quality of real‐time multiple‐Doppler winds produced southern France from six ground‐based radars French operational network ARAMIS . An original verification procedure based upon exploitation radial velocities is proposed and applied 10 h data HyMeX I ntensive Observing Periods IOPs) 6, 8 15. The statistical...
Abstract Today, resilience in the face of cyclone risks has become a crucial issue for our societies. With climate change, risk strong cyclones occurring is expected to intensify significantly and impact way life many countries. To meet some associated challenges, interdisciplinary ReNovRisk programme aims study tropical their impacts on South-West Indian Ocean basin. This article presentation programme, which divided into four areas: cyclonic hazards, erosion solid transport processes,...
A triply nested mesoscale atmospheric numerical model is used to study the dynamics of diurnal cycle summertime lower atmosphere along central Oregon coast. Simulations four consecutive days in September 1998, during which winds were strong and northerly, are analyzed. Comparisons with profiler observations suggest that performed well enough provide a useful estimate circulation. During interest, low-level wind pattern has broad maximum between Cape Blanco Mendocino, large north–south...
Abstract. This study presents the principles of new coupling interface based on SURFEX multi-surface model and OASIS3-MCT coupler. As can be plugged into several atmospheric models, it used in a wide range applications, from global regional coupled climate systems to high-resolution Numerical Weather Prediction or very fine scale dedicated process studies. The objective this development is build share common structure for all these applications atmosphere-surface coupling, between models...
Doppler radar–derived fields of wind and reflectivity, retrieved temperature perturbations, estimated water vapor, cloud contents are used to initialize a nonhydrostatic cloud-resolving model. Airborne data collected in tropical mesoscale convective system on 9 February 1993 during the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment prepared for this purpose. Different numerical experiments conducted verify reliability approach determine most important...
Volcanic eruptions can cause damage to land and people living nearby, generate high concentrations of toxic gases, also create large plumes that limit observations the performance forecasting models rely on these observations. This study investigates use micro- meso-scale simulation represent predict convection, transport, deposit volcanic pollutants. The case under is 2007 eruption Piton de la Fournaise, simulated using a high-resolution, coupled lava/atmospheric approach (derived from...
Abstract The purpose of this work is to study the added value a regional climate model with respect global analyses used drive simulation, special emphasis on nonlinear interactions between different spatial scales, focusing moisture flux divergence. atmospheric water budget apply spatial-scale decomposition approach, as it key factor in energetics climate. A Fourier analysis performed individually for each field pressure levels. Each involved computation divergence separated into three...