A5055854481- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- Precipitation Measurement and Analysis
- Climate variability and models
- Aeolian processes and effects
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Air Quality and Health Impacts
- Linguistics and Discourse Analysis
- Tropical and Extratropical Cyclones Research
- Arctic and Antarctic ice dynamics
- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Oceanographic and Atmospheric Processes
- CO2 Sequestration and Geologic Interactions
- Ionosphere and magnetosphere dynamics
- Industrial Gas Emission Control
- GNSS positioning and interference
- Education, sociology, and vocational training
- Icing and De-icing Technologies
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Ocean Acidification Effects and Responses
- Geophysics and Gravity Measurements
Laboratoire de Météorologie Physique
2013-2025
Université Clermont Auvergne
2009-2025
Centre National de la Recherche Scientifique
2010-2025
Institut Universitaire de France
2023-2025
University of Leeds
2013-2017
Abstract The goal of the Sea2Cloud project is to study interplay between surface ocean biogeochemical and physical properties, fluxes atmosphere, ultimately their impact on cloud formation under minimal direct anthropogenic influence. Here we present an interdisciplinary approach, combining atmospheric physics chemistry with marine biogeochemistry, during a voyage 41° 47°S in March 2020. In parallel ambient measurements composition seawater describe semicontrolled experiments characterize...
Risk mitigation in long-dormant volcanic provinces is a challenge due to the absence of collective memory past disasters as well scarcity, and subtlety, unrest signals that can be monitored. In this study, impact potential limnic eruption assessed at 92-m-deep lake Pavin (French Massif Central). The hosted maar crater formed during last eruptive event metropolitan France (~7 ka) contains dissolved CO2 deepest water layer, below 60 m. Carbon dioxide (CO2) emissions measured surface (0.44 km2)...
Abstract Volcanic emissions can significantly affect the Earth's radiation budget by emitting aerosol particles and gas‐phase species that result in new particle formation (NPF). These scatter solar or modify cloud properties, with consequences on health, weather, climate. To our knowledge, this is first dedicated study detailing how precursors emitted from volcanic plumes influence NPF. A series of airborne measurements were performed around Etna Stromboli volcanoes within framework...
The most important milestone in a mixed-phase cloud’s life is the initiation of ice. If we cannot sufficiently capture this process weather and climate models then it unlikely that properties evolution will be accurately represented. Here focus on improving representation ice-nucleating particles (INPs), which are fundamental link between aerosols primary ice production clouds.We use newly collated dataset 20 campaigns from across northern hemisphere using Portable Ice Nucleation...
Abstract. A significant part of precipitation originates from ice crystals while the representation cloud mixed phase by atmospheric models remains a challenging task. One well-known problem is discrepancy between concentration nucleating particles (INPs) and crystal number concentration. This study explores effect secondary production (SIP) on properties intense event IOP7a observed during HYMEX campaign. The SIP rain assessed turning or off mechanisms in 3D bin microphysics scheme DESCAM....
Abstract Despite having very low atmospheric concentrations, ice‐nucleating particles (INPs) play an important role in the formation of ice crystals at temperatures warmer than −35°C and hence precipitation cycle. Moreover, they tend to have a high spatiotemporal variability. In order understand this variability, long‐term measurements with temporal resolution are essential. This paper presents analysis 3 months online INP (10 min time‐resolved), using PINE cloud chamber (−33°C ≤ T −22°C)....
In this article, we focus on one case study from the Convective and Orographically-induced Precipitation Study (COPS), which took place in north-eastern France south-western Germany during summer of 2007, a low mountain area.We investigate lee side precipitation due to shallow deep convection Intensive Observation Period (IOP) COPS have been well documented by all instruments.For that aim, use set observations radars, radiosoundings, satellite, network Global Positioning System (GPS)...
Abstract A comparison between retrieved properties of the rain drop size distributions (DSDs) from multifrequency cloud radar observations and WRF Model results using either Morrison or Thompson bulk microphysics scheme is performed in order to evaluate model’s ability predict microphysics. This reveals discrepancies vertical profile DSDs for stratiform region squall-line system observed on 12 June 2011 over Oklahoma. Based numerical sensitivity analyses, this study addresses bias at top...
Abstract This study investigates how multifrequency cloud radar observations can be used to evaluate the representation of rain microphysics in WRF Model using two bulk schemes. A squall line observed over Oklahoma on 12 June 2011 is as a case study. recently developed retrieval technique combining vertically pointing radars provides quantitative description drop size distribution (DSD) properties transition and stratiform regions squall-line system. For first time, results this are compared...
The microphysical properties of two mixed-phase clouds (MPCs), one over sea ice, and another open ocean, are investigated using in situ measuring probes a cloud radar installed on-board aircraft during the Arctic CLoud Observations Using airborne measurements polar Day (ACLOUD) field campaign, west Svalbard on 17 June 2017. Comparisons between observations different configurations Weather Research Forecasting (WRF) model conducted reveal discrepancies vertical profile ice crystal...
Abstract Using multifrequency radar observations providing raindrop size distribution evolution with high spatial and temporal resolution, this study aims to assess the ability of different parameterizations self‐collection breakup processes applied in mesoscale models, reproduce statistics derived from observations. The stratiform zones two types precipitating systems are studied, a frontal situation that occurred over Finland June 2014 squall line system observed Oklahoma 2011. An analysis...
Simulations of an idealized stratiform cloud system are performed with the 3D cloud-scale model DESCAM-3D (DEtailed SCAvenging Model) using a bin-resolved microphysics scheme for ice, water and aerosol particles. This case corresponds to numerical simulations moist airflow over narrow isolated mountain gentle slope in order obtain situation where radar bright-band phenomena often visible. For this dynamical impact detailed time-dependent melting has been studied. allows calculation water/ice...
Aerosols are known to significantly affect cloud and precipitation patterns intensity, but these interactions ignored or very simplistically handled in climate numerical weather‐prediction (NWP) models. A suite of one‐way nested Met Office Unified Model (UM) runs, with a single‐moment bulk microphysics scheme was used study two convective cases contrasting characteristics observed southern England. The autoconversion process that converts water rain is directly controlled by the assumed...
Abstract. A convection-permitting limited area model with periodic lateral boundary conditions and prognostic aerosol microphysics is applied to investigate how concentrations of cloud condensation nuclei (CCN) in the marine layer are affected by high-resolution dynamical thermodynamic fields. The microphysics–dynamics model, which resolves differential particle growth composition across size range, a domain designed match approximately single grid square climate model. We find that, during...
Numerical modelling of the airflow and precipitating convective systems are performed to better understand role topography for triggering convection over a moderate mountain region during Convective Orographically induced Precipitation Study (COPS) campaign.A non-hydrostatic cloud scale model with two nested domains is used which permits zoom from mesoscale environment south-western Germany/eastern France, into Vosges Mountains finally small-terrain field experiment, increasing grid...
Abstract. This paper describes an innovative project which has just been launched at the "Laboratoire de Météorologie Physique" (LaMP) in Clermont-Ferrand collaboration with "Meteorologische Institut" Hamburg, where a low cost X-band high resolution precipitation radar is combined supporting measurements and bin microphysical cloud resolving model order to develop adapted Z–R relationships for accurate rain rate estimates over local area such as small catchment basin, urban complex or even...
Abstract. Over the Cévennes–Vivarais region in southern France 5 h intensive rainfall covering an area of 1000 km2 with more than 50 mm rain accumulation was observed during IOP7a HyMeX. This study evaluates performance a bin-resolved cloud model for simulating this heavy-precipitation event. The simulation results were compared observations accumulation, radar reflectivity, temporal and spatial evolution precipitation, min rates, raindrop size distributions (RSDs). different scenarios...
Abstract. Sulfuric acid (H2SO4) is commonly accepted as a key precursor for atmospheric new particle formation (NPF). However, direct measurements of [H2SO4] remain challenging, thereby preventing the determination this important quantity, and, consequently, complete understanding its contribution to NPF process. Several proxies have been developed bridge gaps, but their ability predict under very specific conditions, such those encountered in volcanic plumes (including, particular, high...
We investigated the role of passive volcanic plume Mount Etna (Italy) in formation new particles size range 2.5–10 nm through gas-to-particle nucleation sulfuric acid (H2SO4) precursors, formed from oxidation SO2, and their evolution to with diameters larger than 100 nm. Two simulations were performed using Weather Research Forecasting Model coupled chemistry (WRF-Chem) under same configuration, except for parameterization implemented model: activation (JS1 = 2.0 × 10−6 (H2SO4)) first...
Abstract. A convection-permitting limited area model with periodic lateral boundary conditions and prognostic aerosol microphysics is applied to investigate how concentrations of cloud condensation nuclei (CCN) in the marine layer are affected by high resolution dynamical thermodynamic fields. The high-resolution microphysics–dynamics model, which resolves differential particle growth composition across size range, on a domain designed match approximately single grid square climate model. We...
The recent development of satellite products for observing precipitation based on different technologies (microwaves, infrared, etc.) allows near-real-time meteorological studies. purpose this article is to evaluate 11 (GHE, PDIR, IMERG-Early v6, IMERG-Late CMORPH v0.x, CMORPH-RT GSMaP-NRT v7, GSMaP-NRT-GC GSMaP-NOW GSMaP-NOW-GC and DATABOURG) currently available compare them 2 ground-based radar networks (PANTHERE OPERA) the French rain-gauge network RADOME. Two case studies intense over...