A5015717215- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Remote Sensing and LiDAR Applications
- Climate variability and models
- Remote Sensing in Agriculture
- Fire effects on ecosystems
- Advanced Optical Sensing Technologies
- Aeolian processes and effects
- Forest ecology and management
- Advanced Fiber Laser Technologies
- Air Quality Monitoring and Forecasting
- Precipitation Measurement and Analysis
- Geophysics and Gravity Measurements
- Laser-induced spectroscopy and plasma
- Oceanographic and Atmospheric Processes
- Groundwater and Isotope Geochemistry
- 3D Surveying and Cultural Heritage
- Non-Invasive Vital Sign Monitoring
- Laser Design and Applications
- Advanced Measurement and Detection Methods
- Tropical and Extratropical Cyclones Research
Laboratoire des Sciences du Climat et de l'Environnement
2016-2025
CEA Paris-Saclay
2016-2025
Université de Versailles Saint-Quentin-en-Yvelines
2016-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Université Paris-Saclay
2010-2025
Centre d'Enseignement et de Recherche en Environnement Atmosphérique
2014-2023
Institut Pierre-Simon Laplace
2018
Office National d'Études et de Recherches Aérospatiales
2009-2017
Direction des énergies
2016
Trade-wind cumuli constitute the cloud type with highest frequency of occurrence on Earth, and it has been shown that their sensitivity to changing environmental conditions will critically influence magnitude pace future global warming. Research over last decade pointed out importance interplay between clouds, convection circulation in controling this sensitivity. Numerical models represent diverse ways, which translates into different responses trade-cumuli climate perturbations. Climate...
Abstract. The Chemistry-Aerosol Mediterranean Experiment (ChArMEx; http://charmex.lsce.ipsl.fr) is a collaborative research program federating international activities to investigate regional chemistry-climate interactions. A special observing period (SOP-1a) including intensive airborne measurements was performed in the framework of Aerosol Direct Radiative Impact on climate MEDiterranean region (ADRIMED) project during dry season over western and central basins, with focus...
Abstract. Long-range transport of biomass burning (BB) aerosols between North America and the Mediterranean region took place in June 2013. A large number ground-based airborne lidar measurements were deployed western during Chemistry-AeRosol EXperiment (ChArMEx) intensive observation period. detailed analysis potential American aerosol sources is conducted including assessment their to Europe using forward simulations FLEXPART Lagrangian particle dispersion model initialized satellite...
Abstract. The increasing importance of the coupling water and aerosol cycles in environmental applications requires observation tools that allow simultaneous measurements these two fundamental processes for climatological meteorological studies. For this purpose, a new mobile Raman lidar, WALI (Water vapor Aerosol LIdar), has been developed implemented within framework international HyMeX ChArMEx programs. This paper presents key properties device its first to scientific lidar uses an...
Abstract. We performed synergetic daytime and nighttime active passive remote-sensing observations at Minorca (Balearic Islands, Spain), over more than 3 weeks during the Chemistry-Aerosol Mediterranean Experiment/Aerosol Direct Radiative Effect in (ChArMEx/ADRIMED) special observation period (SOP 1a, June–July 2013). characterized aerosol optical properties type low middle troposphere using an automated procedure combining Rayleigh–Mie–Raman lidar (355, 387 407 nm) with depolarization (355...
Abstract. The Infrared Atmospheric Sounding Interferometer (IASI) is a new generation spaceborne passive sensor mainly dedicated to meteorological applications. Operational Level-2 products have been available via the European Organisation for Exploitation of Meteorological Satellites (EUMETSAT) several years. In particular, vertical profiles water vapor measurements are retrieved from infrared radiances at global scale. Nevertheless, robustness such has be checked because only few...
During the Intensive Observing Period 15b of first Special Observation Hydrological Cycle in Mediterranean Experiment ( HyMeX ), a variety mesoscale convective systems MCSs ) impacted Cevennes‐Vivarais CV target area leading to over 100 mm 24 h accumulated rainfall on 20 and 21 October 2012. The was by V‐shaped MCS developing Cevennes mountains, then initiated eastern foothills Pyrenees finally three initiating sea. propagated along well‐defined storm track ahead an approaching upper‐level...
Abstract. In June 2013, a ground-based mobile lidar performed the ~10 000 km ride from Paris to Ulan-Ude, near Lake Baikal, profiling for first time aerosol optical properties all way western Europe central Siberia. The instrument was equipped with N2-Raman and depolarization channels that enabled an speciation of aerosols in low middle troposphere. extinction-to-backscatter ratio (also called or LR) particle (PDR) at 355 nm have been retrieved. LR lower boundary layer (300–700 m) found be...
Abstract. The evolution of the vertical distribution and optical properties aerosols in free troposphere, above stratocumulus, is characterized for first time over Namibian coast, a region where uncertainties on aerosol–cloud coupling climate simulations are significant. We show high variability atmospheric aerosol composition lower middle troposphere during Aerosols, Radiation Clouds southern Africa (AEROCLO-sA) field campaign (22 August–12 September 2017) around Henties Bay supersite using...
Abstract. The Forests gAses aeRosols Clouds Exploratory (FARCE) campaign was conducted in March–April 2015 on the tropical island of La Réunion. For first time, several scientific teams from different disciplines collaborated to provide reference measurements and characterization Réunion vegetation, volatile organic compounds (VOCs), biogenic VOCs (BVOCs), (bio)aerosols composition clouds, with a strong focus Maïdo mountain slope area. main observations obtained during this 2-month intensive...
Abstract. As part of the EUREC4A (Elucidating role cloud–circulation coupling in climate) field campaign, which took place January and February 2020 over western tropical Atlantic near Barbados, French SAFIRE ATR42 research aircraft (ATR) conducted 19 flights lower troposphere. Each flight followed a common pattern that sampled atmosphere around cloud base level, at different heights subcloud layer, sea surface free The aircraft's payload included backscatter lidar Doppler radar were both...
Abstract. The isotopic composition of water vapor is a valuable tool to track atmospheric hydrological processes and evaluate numerical models simulating the cycle. To ensure accurate model-observation comparisons, understanding spatial temporal distribution isotopes in troposphere crucial. challenging task obtaining highly resolved observations typically addressed through airborne measurements performed onboard conventional aircrafts, but these offer limited microscale insights. This study...
Abstract. Numerous field campaigns have been carried out to quantify the water vapour content of atmosphere using vibrational Raman lidar technology. Each them raises question calibration methods, in particular reliability this over time. We present a study on stability WALI developed at Laboratoire des Sciences du Climat et de l’Environnement France (LSCE), period 7 years (2016–2022) and across several campaigns. A method is applied that mainly use radiosondes and, few cases, airborne...
Southern France is often affected by heavy-precipitation events (HPEs) leading to severe flooding in the regions of Occitanie, Provence-Alpes-Côte d'Azur, and Corsica. In many cases, these HPEs are triggered a strong south-easterly moisture transport from Mediterranean lower atmosphere (below 850 hPa). To date forecasting magnitude location challenging for numerical weather prediction models (NWP): false positive alarms as well negative need be minimized. We hypothesize that an...
The Airborne Weather and Aerosol Lidar (A-WALI) is the first airborne meteorological lidar using Raman technology to measure horizontal fields of water vapour, temperature, clouds aerosols, as key weather climate parameters (https://metclim-lidars.aeris-data.fr/). Based on technologies tested in WALI (Totems et al., 2021; Chazette 2014)) ALiAS (Chazette 2020), it was developed meet scientific objectives ERC project MAESTRO (Mesoscale Organisation Tropical Convection,...
<strong class="journal-contentHeaderColor">Abstract.</strong> The complex vertical distribution of aerosols over coastal southern West Africa (SWA) is investigated using airborne observations and numerical simulations. Observations were gathered on 2 July 2016 offshore Ghana Togo, during the field phase Dynamics-Aerosol-Chemistry-Cloud Interactions in project. This was only flight conducted ocean which a downward-looking lidar operational. aerosol loading lower troposphere includes...
Abstract. From 23 January to 13 February 2020, 20 manned research flights were conducted over the tropical Atlantic, off coast of Barbados (13∘30′ N, 58∘30′ W), characterize trade-wind clouds generated by shallow convection. These as part international EUREC4A (Elucidating role cloud–circulation coupling in climate) field campaign. One objectives these was cumuli at their base for a range meteorological conditions, convective mesoscale organizations and times day, with help sidewards-staring...
In June 2013, a ground-based mobile lidar performed the ~10,000 km ride from Paris to Ulan-Ude, near Lake Baikal, profiling aerosol optical properties in cities visited along journey and allowing first comparison of urban aerosols across Eurasia. The instrument was equipped with N2-Raman depolarization channels, enabling retrieval 355-nm extinction-to-backscatter ratio (also called Lidar Ratio (LR)) linear Particle Depolarization (PDR) planetary boundary or residual layer over 11 cities....
Few airborne aerosol research experiments have deployed N2-Raman Lidar despite its capability to retrieve optical properties without ambiguity. Here, we show the high scientific potential of this instrument when used with specific flight plans. Our demonstration is based on (i) a field-experiment conducted in June 2015 southern France, involving embedded an ultra-light aircraft (ULA); and (ii) appropriate algorithmic approach using two-level levels, aiming solve notorious instability...
The Hydrological cycle in the Mediterranean eXperiment ( HyMeX ) was held autumn 2012 during which part of observational effort established on Menorca Island to characterize upwind marine low‐level flow. ground‐based Water‐vapour Raman Lidar WALI ), airborne water‐vapour lidar LEANDRE 2 and boundary‐layer pressurized balloons were implemented first Special Observing Period contributed water vapour variability vicinity Balearic Islands, together with existing network Global Positioning System...