A5073377992- Meteorological Phenomena and Simulations
- Atmospheric aerosols and clouds
- Wind and Air Flow Studies
- Climate variability and models
- Atmospheric and Environmental Gas Dynamics
- Plant Water Relations and Carbon Dynamics
- Fluid Dynamics and Turbulent Flows
- Geophysics and Gravity Measurements
- Ocean Waves and Remote Sensing
- Atmospheric chemistry and aerosols
- Oceanographic and Atmospheric Processes
- Cryospheric studies and observations
- Landslides and related hazards
- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- Aeolian processes and effects
- Aerospace Engineering and Energy Systems
- Traffic Prediction and Management Techniques
- Statistical and numerical algorithms
- Liquid Crystal Research Advancements
- Time Series Analysis and Forecasting
- Adaptive optics and wavefront sensing
- Hydrology and Sediment Transport Processes
- Solar and Space Plasma Dynamics
- Air Quality Monitoring and Forecasting
Université de Toulouse
2009-2024
Centre National de la Recherche Scientifique
2009-2024
Centre National de Recherches Météorologiques
2016-2024
Météo-France
2016-2024
Laboratoire d'Aérologie
2010-2016
University of Leeds
2011-2016
National Centre for Atmospheric Science
2012
Centre d'Enseignement et de Recherche en Environnement Atmosphérique
2011
Abstract The mostly ice covered Arctic Ocean is dominated by low‐level liquid‐ or mixed‐phase clouds. Turbulence within stratocumulus primarily driven cloud top cooling that induces convective instability. Using a suite of in situ and remote sensing instruments we characterize turbulent mixing stratocumulus, for the first time estimate profiles gradient Richardson number at relatively high resolution both (10 min) altitude m). It found occurs cloud, as expected, wind shear instability near...
Irrigation in semi-arid regions induces thermal heterogeneity across a range of spatial scales that impacts the partitioning energy at surface, development atmospheric boundary layer, and bidirectional interactions between atmosphere surface. In this analysis, we use data from Land Surface Interactions with Atmosphere Iberian Semi-Arid Environment (LIAISE) experiment combined coupled land–atmosphere model to understand role irrigation-induced, on surface fluxes consequently, diurnal...
The HYdrological cycle in the Mediterranean Experiment (HyMeX) Special Observing Period 2 (SOP2, January 27–March 15, 2013) was dedicated to study of dense water formation Gulf Lion northwestern Mediterranean. This paper outlines deep convection winter 2012–2013 and meteorological conditions that produced it. Alternating phases mixing restratification are related periods high low heat losses, respectively. High-resolution, realistic, three-dimensional models essential for assessing intricacy...
Abstract. This study presents the first deployment in field campaigns of a balloon-borne turbulence probe, developed with sonic anemometer and an inertial motion sensor suspended below tethered balloon. system measures temperature horizontal vertical wind at high frequency allows estimation heat momentum fluxes as well turbulent kinetic energy lower part boundary layer. The was validated during three experiments different convective boundary-layer conditions, based on measurements from...
Abstract. A RPG-HATPRO ground-based microwave radiometer (MWR) was operated in a deep Alpine valley during the Passy-2015 field campaign. This experiment aims to investigate how stable boundary layers wintertime conditions drive accumulation of pollutants. In order understand atmospheric processes valley, MWRs continuously provide vertical profiles temperature and humidity at high time frequency, providing valuable information follow evolution layer. one-dimensional variational (1DVAR)...
Abstract. Turbulent dissipation rate retrievals from cloud radar Doppler velocity measurements are evaluated using independent, in situ observations Arctic stratocumulus clouds. In validation data sets of derived sonic anemometer a tethered balloon and high frequency pressure variation research aircraft, both flown proximity to stationary, ground-based radars. Modest biases found among the particularly low- or high-turbulence regimes, but general radar-retrieved values correspond well with...
Abstract During the AMMA experiment, French ATR aircraft flew in lower troposphere south Niger, with instruments that allow fast measurement of wind, temperature and humidity. Stacked legs flown between early June mid‐August into moist southwesterly monsoon flow dry northeasterly Saharan Air Layer (SAL) above, enable us to study interaction two flows at turbulence scale role planetary boundary layer (PBL) transfers them. We describe fluctuations observed top PBL their evolution during...
Abstract During the African Monsoon Multidisciplinary Analysis (AMMA) field campaign, ATR research aircraft made observations of fluxes and thermodynamics during three 15‐day periods, which allowed seasonal evolution atmospheric boundary‐layer (ABL) characteristics to be monitored before after monsoon onset. As expected, temperature humidity showed a contrast between dry warm conditions moister cooler from one period other. Most time, wind blew west (northwesterly southwesterly) in ABL east...
Abstract A modelling case study designed from observations the African Monsoon Multidisciplinary Analysis (AMMA) is presented and discussed. It aims at investigating issue of initiation convection in a semi‐arid environment. This corresponds to development local daytime mainly controlled by boundary layer characteristics rather than atmospheric synoptic scales. high‐resolution three‐dimensional simulation extensively evaluated against numerous available for 10 July 2006 AMMA campaign. The...
Abstract. This study evaluates the ability of three operational models, with resolution varying from 2.5 to 16 km, predict boundary-layer turbulent processes and mesoscale variability observed during Boundary Layer Late-Afternoon Sunset Turbulence (BLLAST) field campaign. We analyse representation vertical profiles temperature humidity time evolution near-surface atmospheric variables radiative fluxes over a total 12 intensive observing periods (IOPs), each lasting 24 h. Special attention is...
Abstract. Observations of turbulence are analysed for the afternoon and evening transition (AET) during Boundary-Layer Late Afternoon Sunset Turbulence (BLLAST) experimental field campaign that took place in Lannemezan (foothills Pyrenees) summer 2011. The case 2 July is further studied because properties lower atmosphere (up to 300 m above ground level) were sampled with Meteorological Mini Aerial Vehicle (M2AV) from turbulently mixed stably stratified atmospheric conditions. Additionally,...
Abstract During winter, cold air outbreaks take place in the northwestern Mediterranean sea. They are characterized by local strong winds (Mistral and Tramontane) which transport dry continental across a warmer In such conditions, high values of surface sensible latent heat flux observed, favor deep oceanic convection. The HyMeX/ASICS‐MED field campaign was devoted to study these processes. Airborne measurements, gathered Gulf Lion during winter 2013, allowed for exploration mean turbulent...
11 ultra‐high‐frequency (UHF) and very‐high‐frequency (VHF) wind‐profiler radars were in operation for 13–18 months during the international Hydrological Cycle Mediterranean Experiment (HyMeX) field campaign, devoted to study of atmospheric marine water cycle western basin. These profilers provided vertical profiles wind vector, turbulence, precipitation height boundary layer tropopause. The inland three VHF aimed document upstream or downstream synoptic flow conditions. Five UHF lower...
Abstract Under wintertime quiescent conditions, thermally driven circulations represent one of the only sources tracer dispersion over mountainous terrain. Those can be unequally developed at a valley scale since they strongly depend on local morphological arrangement. At same time, very heterogeneous pollutant distribution observed, as for instance in French Alpine basin located Arve River valley. This complex regularly shows large variations concentrations with certain sectors suffering...
Abstract. This study proposes the use of a data-driven statistical model to freeze errors due differences in environmental forcing when evaluating surface turbulent heat fluxes from weather and climate numerical models with observations. It takes advantage continuous acquisition over approximately ten years near-surface sensible latent (H LE respectively) together ancillary parameters supersite "Météopole" French national research infrastructure ACTRIS-FR, located Toulouse. The consists...
Abstract Mountainous terrains are known for driving their own dynamics which respond to the local morphological arrangement of area. Thermally driven flows in particular develop at slope and valley scales ensure a certain degree pollutant dispersion under quiescent wintertime synoptic conditions. The present study focuses on section Arve River situated close Mont Blanc frequently suffers from severe pollution episodes stable conditions whilst surrounding valleys appear be less affected....
<p align="justify"><span>Fog strongly perturbs the aviation, marine and land transportation, leading to human losses high financial costs. The primary objective of SOFOG3D is advance our understanding fog processes at smallest scale improve forecasts events by numerical weather prediction (NWP) models.</span></p><p align="justify"><span>Specifically, conducts process...
Abstract. This study evaluates the ability of three operational models, AROME, ARPEGE and ECMWF, to predict boundary-layer turbulent processes mesoscale variability observed during Boundary Layer Late-Afternoon Sunset Turbulence (BLLAST) field campaign. AROME is a 2.5 km limited area non-hydrostatic model operated over France, global with 10 grid-size France ECMWF 16 grid-size. We analyze representation vertical profiles temperature humidity time evolution near surface atmospheric variables...