A5080323007- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Arctic and Antarctic ice dynamics
- Atmospheric Ozone and Climate
- Meteorological Phenomena and Simulations
- Methane Hydrates and Related Phenomena
- Cryospheric studies and observations
- Icing and De-icing Technologies
- Optical Coherence Tomography Applications
- Remote Sensing in Agriculture
- Advanced Optical Sensing Technologies
- Ocular and Laser Science Research
- Climate variability and models
- Ionosphere and magnetosphere dynamics
- Oceanographic and Atmospheric Processes
- Winter Sports Injuries and Performance
- Oil Spill Detection and Mitigation
Centre National de la Recherche Scientifique
2016-2024
Sorbonne Université
2016-2024
Laboratoire atmosphères, milieux, observations spatiales
2015-2024
Université de Versailles Saint-Quentin-en-Yvelines
2018-2024
Institut Pierre-Simon Laplace
2017-2024
Université Paris-Saclay
2023
Université Paris Cité
2018
Abstract Reanalysis datasets from atmospheric models and satellite products are often used for Arctic surface shortwave (SW) longwave (LW) radiative budget analyses, but they suffer limitations require validation against local‐scale observations. These rare in the high Arctic, especially longer periods that include seasonal transitions. In this study, radiation meteorological observations acquired during Norwegian Young Sea Ice Cruise (N‐ICE2015) campaign over sea ice north of Svalbard...
Abstract We have analyzed aerosol properties at the regional scale over high Arctic north of Svalbard between October 2014 and June 2015 from version 4 (V4) CALIOP (Cloud Aerosol Lidar with Orthogonal Polarization) spaceborne observations compared results surface lidar IAOOS (Ice‐Atmosphere‐Ocean Observing System) platforms. data indicate a maximum in occurrence end winter attributed to low‐level (0–2 km) midtropospheric (2–5 particles identified V4 product as being mostly dust origin....
Abstract An international field experiment took place in the Swiss Jura January 2021 as a milestone of European ICE GENESIS project ( www.ice-genesis.eu/ ), which aims to better measure, understand, and model ice/snow particle properties mechanisms responsible for icing rotor-craft aircraft. The campaign was designed collect observations clouds snowfall at prescribed range temperatures (−10° +2°C). suite situ remote sensing instruments included airborne probes imagers on board SAFIRE ATR-42...
The in situ tests of first ever autonomous aerosol and cloud backscatter LIDAR (light detection ranging) systems implemented on buoys for Arctic observations has been achieved 2015 within the French EQUIPEX IAOOS project.The environmental operational constraints were met by adopting a concept fibered microjoule lidar system using laser diode.Two have developed with without polarization analysis capability.A specific optical design was used discrimination.These integrated tested 2014 at...
Abstract. Tropical tropopause layer (TTL) clouds have a significant impact on the Earth's radiative budget and regulate amount of water vapor entering stratosphere. Estimating total coverage tropical cirrus is challenging, since range their optical depth spans several orders magnitude, from thick opaque detrained convection to sub-visible just below During Strateole-2 observation campaign, three microlidars were flown board stratospheric superpressure balloons October 2021 late January 2022,...
Abstract. The Ice, Atmosphere, Arctic Ocean Observing System (IAOOS) field experiment took place from 2014 to 2019. Over this period, more than 20 instrumented buoys were deployed at the North Pole. Once locked into ice, drifted for periods of a month year. Some these equipped with 808 nm wavelength lidars which acquired total 1777 profiles over course campaign. This IAOOS lidar dataset is exploited establish novel statistic cloud cover and geometrical optical characteristics lowest layer....
Abstract. Our study provides new information on aerosol-type seasonal variability and sources in Siberia using observations (ground-based lidar sun photometer combined with satellite measurements). A micropulse emitting at 808 nm provided almost continuous aerosol backscatter measurements for 18 months (April 2015 to September 2016) Siberia, near the city of Tomsk (56∘ N, 85∘ E). total 540 vertical profiles (300 daytime 240 night-time) ratio extinction have been retrieved over periods 30...
A balloon-borne microlidar has been built at LATMOS to monitor cirrus optical properties and convective overshoot topography during long duration flights in the lower tropical stratosphere. Weighting less than 7 kg a reduced volume consuming 10 W, it will be involved CNES-Strateole2 campaign. This instrument paves way use of technology for planetary missions.
Abstract. The Arctic is facing drastic climate changes that are not correctly represented by state-of-the-art models because of complex feedbacks between radiation, clouds and sea-ice surfaces. A better understanding the surface energy budget requires radiative measurements limited in time space High (> 80° N) mostly obtained through specific expeditions. Six years lidar observations onboard buoys drifting Ocean above 83° N have been carried out as part IAOOS (Ice Atmosphere arctic...
Tropical cirrus clouds have a strong impact on the Earth’s climate, modulating both radiative budget and amount of water vapor transported to stratosphere. They are still challenging observe : ground-based airborne observations limited coverage, if space-borne sensors provide invaluable continuous at global scale, they lack sensitivity optically thin clouds. To tackle this issue better characterize tropical new light-weight microlidar, named BeCOOL (Balloon-borne Cirrus convective...
The development of a first ever autonomous aerosol and cloud backscatter lidar system for on-buoy arctic observations has been achieved in 2014, within the French EQUIPEX IAOOS project developed collaboration with LOCEAN at UPMC. This is part larger set-up designed integrated ocean-ice-atmosphere observations. First results have obtained from spring to autumn 2014 after was installed North Pole Barneo Russian camp, winter-spring 2015 during Norwegian campaign N-ICE 2015. buoys were taking as...
Tropical Tropopause Layer clouds have a significant impact on the Earth's radiative budget and regulate amount of water vapor entering stratosphere. They are key component climate system but their observation is still challenging. The Strateole-2 project aims at  better understanding dynamical, transport, processes in (TTL) using long-duration super-pressure balloons flying for several months lower stratosphere along equator belt. From October 2021 to late January 2022, three...
Abstract. Tropical Tropopause Layer (TTL) clouds have a significant impact on the Earth’s radiative budget and regulate amount of water vapor entering stratosphere. During Strateole-2 observation campaign, three microlidars were flown onboard stratospheric superpressure balloons from October 2021 to late January 2022, slowly drifting only few kilometers above TTL. These measurements unprecedented sensitivity thin cirrus provide fine-scale description cloudy structures both in time space....