A5101807257- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Aeolian processes and effects
- Meteorological Phenomena and Simulations
- Oil Spill Detection and Mitigation
- Oceanographic and Atmospheric Processes
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Fire effects on ecosystems
- Ocean Waves and Remote Sensing
- Satellite Image Processing and Photogrammetry
- Marine and coastal ecosystems
- Impact of Light on Environment and Health
- Energy and Environment Impacts
- Climate Change Policy and Economics
- Healthcare Systems and Challenges
- Geophysics and Gravity Measurements
- Clinical Nutrition and Gastroenterology
- Tropical and Extratropical Cyclones Research
- Calibration and Measurement Techniques
- Wind Energy Research and Development
- Climate Change and Environmental Impact
Centre National de la Recherche Scientifique
2016-2025
Centre National de Recherches Météorologiques
2017-2025
Météo-France
2016-2025
Université de Toulouse
2013-2025
Center for Neuroscience and Regenerative Medicine
2024
Laboratoire d'Aérologie
2007-2018
Université Toulouse III - Paul Sabatier
2005-2017
Observatoire Midi-Pyrénées
2005
Université de Toulon
2003-2005
Abstract This study introduces CNRM‐ESM2‐1, the Earth system (ES) model of second generation developed by CNRM‐CERFACS for sixth phase Coupled Model Intercomparison Project (CMIP6). CNRM‐ESM2‐1 offers a higher complexity than Atmosphere‐Ocean General Circulation CNRM‐CM6‐1 adding interactive ES components such as carbon cycle, aerosols, and atmospheric chemistry. As both models share same code, physical parameterizations, grid resolution, they offer fully traceable framework to investigate...
We investigate the climatic impact of shortwave and longwave radiative forcing Saharan dust on West African monsoon Sahel precipitation using a regional climate model (RCM) interactively coupled to running for period 1996–2006. Two competing effects are found. First reduction intensity in lower troposphere induced by surface cooling causes precipitation, second an ‘elevated heat pump effect’ higher diabatic warming increase precipitation. In standard configuration, net these is over most...
Abstract. Since the 1980s several spaceborne sensors have been used to retrieve aerosol optical depth (AOD) over Mediterranean region. In parallel, AOD climatologies coming from different numerical model simulations are now also available, permitting distinguish contribution of types total AOD. this work, we perform a comparative analysis unique multi-year database in terms and its apportionment by five main (soil dust, sea-salt, sulfate, black organic carbon). We use 9 satellite-derived...
Abstract Since the 1980s anthropogenic aerosols have been considerably reduced in Europe and Mediterranean area. This decrease is often considered as likely cause of brightening effect observed over same period. phenomenon however hardly reproduced by global regional climate models. Here we use an original approach based on reanalysis‐driven coupled system modeling to show that aerosol changes explain 81 ± 16% 23 5% surface warming simulated for period 1980–2012 Europe. The direct found...
Abstract. Over the past decade, aerosol optical depth (AOD) observations based on satellite and ground measurements have shown a significant increase over Arabia Arabian Sea, attributed to an intensification of regional dust activity. Recent studies also suggested that west Asian forcing could induce positive response Indian monsoon precipitations weekly timescale. Using climate model including interactive slab-ocean schemes, present study investigates possible climatic links between...
Abstract. In the southeast Atlantic, well-defined smoke plumes from Africa advect over marine boundary layer cloud decks; both are most extensive around September, when of resides in free troposphere. A framework is put forth for evaluating performance a range global and regional atmospheric composition models against observations made during NASA ORACLES (ObseRvations Aerosols above CLouds their intEractionS) airborne mission September 2016. strength comparison focus on spatial distribution...
Abstract Direct and semi‐direct radiative effects of biomass burning aerosols (BBA) from southern central African fires are still widely debated, in particular because climate models have been unsuccessful reproducing the low single scattering albedo BBA over eastern Atlantic Ocean. Using state‐of‐the‐art airborne situ measurements Mie simulations, we demonstrate that well‐aged plumes West Africa results presence strongly absorbing refractory black carbon (rBC), whereas brown contribution to...
Abstract. The present work analyses the effect of dust aerosols on surface and top atmosphere radiative budget, temperature, sensible heat fluxes, atmospheric heating rate convective activity over West Africa. study is focused regional impact a major event period 7–14 March 2006 through numerical simulations performed with mesoscale, nonhydrostatic model MesoNH. Due to its importance budgets, specific attention has been paid representation single scattering albedo (SSA) in MesoNH by using...
Several studies have shown the importance of desert dust aerosols in weather forecast models. Nevertheless, has been poorly represented such models and is source some prediction errors, particular for tropical subtropical regions. The purpose this paper to illustrate formation three‐dimensional transport a severe storm which occurred March 2006 over West Africa. An intense haze was transported southward Gulf Guinea thereby generating an aerosol optical thickness (AOT) greater than 4 Nigeria....
Abstract. In this study, vertical profiles and column-integrated aerosol properties retrieved by the GRASP (Generalized Retrieval of Atmosphere Surface Properties) algorithm are evaluated with in situ airborne measurements made during ChArMEx-ADRIMED field campaign summer 2013. framework campaign, two different flights took place over Granada (Spain) a desert dust episode on 16 17 June. The algorithm, which combines lidar sun–sky photometer data measured at Granada, was used to retrieve...
Abstract. In this study, we investigate the shortwave aerosol direct radiative forcing (ADRF) and its feedback on air temperature atmospheric dynamics during a major fire event that occurred in Russia August 2010. The methodology is based an offline coupling between CHIMERE chemistry-transport Weather Research Forecasting (WRF) models. First, simulations for period 5–12 2010 have been evaluated by using AERONET (AErosol RObotic NETwork) satellite measurements of POLarization Directionality...
Abstract. Southern West Africa (SWA) is an African pollution hotspot but a relatively poorly sampled region of the world. We present overview in situ aerosol optical measurements collected over SWA June and July 2016 as part DACCIWA (Dynamics-Aerosol-Chemistry-Clouds Interactions Africa) airborne campaign. The aircraft wide range air masses, including anthropogenic plumes emitted from coastal cities, long-range transported biomass burning central southern dust Sahara Sahel region, well...
Abstract. Estimates of the direct radiative effect (DRE) from absorbing smoke aerosols over southeast Atlantic Ocean (SAO) require simulation microphysical and optical properties stratocumulus clouds as well altitude shortwave (SW) biomass burning (BBAs). In this study, we take advantage large number observations acquired during ObseRvations Aerosols above Clouds their intEractionS (ORACLES-2016) Layered Smoke Interactions with (LASIC) projects September 2016 compare them datasets...
Abstract. Aerosol heating due to shortwave absorption has implications for local atmospheric stability and regional dynamics. The derivation of rate profiles from space-based observations is challenging because it requires the vertical profile relevant properties such as aerosol extinction coefficient single-scattering albedo (SSA). In southeastern Atlantic, this challenge amplified by presence stratocumulus clouds below biomass burning plume advected Africa, since cloud affect magnitude...
à la diffusion de documents scientifiques niveau recherche, publiés ou non, émanant des établissements d'enseignement et recherche français étrangers, laboratoires publics privés.
Abstract. Mineral dust from arid areas is a major component of global aerosol and has strong interactions with climate biogeochemistry. As part the Chemistry-Aerosol Mediterranean Experiment (ChArMEx) to investigate atmospheric chemistry its impacts in region, an intensive field campaign was performed mid-June early August 2013 western basin including situ balloon-borne measurements light optical counter (LOAC). LOAC counter/sizer that provides concentrations 19 size classes between 0.2 100...
Abstract. The automatic and non-supervised detection of the planetary boundary layer height (zPBL) by means lidar measurements was widely investigated during last several years. Despite considerable advances, experimental still presents difficulties such as advected aerosol layers coupled to (PBL) which usually produces an overestimation zPBL. To improve zPBL in these complex atmospheric situations, we present a new algorithm, called POLARIS (PBL estimation based on depolarisation). applies...
Abstract. Aerosols play an important role in Europe and the Mediterranean area where different sources of natural anthropogenic particles are present. Among them ammonium nitrate (A&N) aerosols may have a growing impact on regional climate. In this study, their representation coarse fine modes has been introduced prognostic aerosol scheme ALADIN-Climate model. This new is evaluated over Sea, using two twin simulations period 1979–2016 with without A&N aerosols. evaluation...
Abstract Global and regional climate models (respectively GCMs RCMs) are delivering conflicting messages about summertime change in Europe, revealing notably a weaker warming RCMs. A dedicated multimodel ensemble of nine GCM‐RCM pairs is analyzed to assess the role anthropogenic aerosols these inconsistencies. The expected decrease aerosol concentrations found both modify future evolution shortwave radiation generate an extra warming. For every tenth optical depth drop Central increased at...
Abstract. Investigating the current and future evolution of surface solar radiation (SSR) is essential in context climate change associated environmental issues. We focus on influence atmospheric aerosols, along with cloud cover water vapor content, northern France Benelux spring summer. Our analysis relies National Centre for Meteorological Research–Limited Area Adaptation Dynamic International Development v6.4 (CNRM-ALADIN64) regional model at 12.5 km resolution, which includes an...
Aerosols and clouds play a major role in the Earth Climate systems, while quantification clear understanding of their variabilities, interactions feedbacks remain great challenge. In particular, aerosols strongly impact energy budget by direct modification solar infrared radiation, alteration cloud properties formation processes as well thermodynamic atmosphere. are also most harmful air pollutant, being responsible several millions premature deaths worldwide each year. Even though diverse...
The impact of the dust sea‐surface forcing (DSSF) on oceanic Primary Production (PP) is investigated here by using 1D modelling approach coupling an atmospheric radiative transfer model and a simple PP model. Simulations reveal that are able to induce significant decrease due attenuation light about 15–25% for optical depth (DOD) larger than 0.6–0.7 (at 550 nm). For DOD lower ∼0.2–0.3, influence weak (∼5%). In addition DOD, important role played single scattering albedo (DSSA) also shown....
Microlidar observations have been performed at the Djougou‐Nangatchori site in northern Benin during African Monsoon Multidisciplinary Analysis (AMMA) Special Observation Period 0 dry season, combined with Dust and Biomass‐Burning Experiment (DABEX) from mid‐January to mid‐February 2006. During Djougou area is a region where biomass burning aerosols are heavily produced agriculture fires. The aerosol vertical distribution also controlled by dynamics, penetration of winter monsoon flux north...
An extremely fresh smoke plume (<5 h) was transported over Barcelona on 23 July 2009, just 5 h after an intense Saharan dust event finalized. Both events were observed by sun-photometer, lidar and satellite systems. Results indicate surprisingly large absorption of mixed particles (SSA ∼ 0.83 ± 0.04) with lower SSA than that for (0.86 at 440 nm. Our investigation shows may have during their transport anthropogenic particles. Dust layers are between 1–6 1–4 km, associated ratios 532 nm 51 36...