A5037444488- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Aeolian processes and effects
- Cryospheric studies and observations
- Air Quality Monitoring and Forecasting
- Ocean Waves and Remote Sensing
- Wind and Air Flow Studies
- Climate change and permafrost
- Icing and De-icing Technologies
- Air Traffic Management and Optimization
- Aerospace and Aviation Technology
- Oceanographic and Atmospheric Processes
- Tropical and Extratropical Cyclones Research
- Climate variability and models
- Astronomical Observations and Instrumentation
- Atmospheric Ozone and Climate
- Coastal and Marine Dynamics
- Astronomy and Astrophysical Research
- Particle Dynamics in Fluid Flows
- Solar and Space Plasma Dynamics
- Ocean Acidification Effects and Responses
- Laser-induced spectroscopy and plasma
École Polytechnique Fédérale de Lausanne
2025
Cooperative Institute for Research in Environmental Sciences
2021-2024
University of Colorado Boulder
2020-2024
In-Situ (United States)
2023-2024
University of Colorado System
2020-2023
Centre National de la Recherche Scientifique
2017-2021
Météo-France
2016-2021
Laboratoire de l'Atmosphère et des Cyclones
2021
Centre National de Recherches Météorologiques
2017-2019
Seoul National University
2013
With the Arctic rapidly changing, needs to observe, understand, and model changes are essential. To support these needs, an annual cycle of observations atmospheric properties, processes, interactions were made while drifting with sea ice across central during Multidisciplinary Observatory for Study Climate (MOSAiC) expedition from October 2019 September 2020. An international team designed implemented comprehensive program document characterize all aspects system in unprecedented detail,...
Year-round observations of the physical snow and ice properties processes that govern pack evolution its interaction with atmosphere ocean were conducted during Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC) expedition research vessel Polarstern in Ocean from October 2019 to September 2020. This work was embedded into interdisciplinary design 5 MOSAiC teams, studying atmosphere, sea ice, ocean, ecosystem, biogeochemical processes. The overall aim characterize cover...
Abstract. Between 24 January and 15 February 2020, small uncrewed aircraft systems (sUASs) were deployed to Morgan Lewis (Barbados) as part of the Atlantic Tradewind Ocean–Atmosphere Mesoscale Interaction Campaign (ATOMIC), a sister project ElUcidating RolE Cloud-Circulation Coupling in ClimAte (EUREC4A) project. The observations from ATOMIC EUREC4A aimed at improving our understanding trade-wind cumulus clouds environmental regimes supporting them involved deployment wide variety...
Over a five-month time window between March and July 2020, scientists deployed two small uncrewed aircraft systems (sUAS) to the central Arctic Ocean as part of legs three four MOSAiC expedition. These sUAS were flown measure thermodynamic kinematic state lower atmosphere, including collecting information on temperature, pressure, humidity winds surface 1 km, well document ice properties, albedo, melt pond fraction, open water amounts. The atmospheric flights primarily conducted by DataHawk2...
Aerosol number size distributions, along with thermodynamic and dynamic parameters, were measured from the surface to 600 m using a tethered balloon, Helikite. The field measurements carried out at Villum Research Station in Northern Greenland 23rd March 2nd May 2024. During transition winter spring, three types of atmospheric regimes identified: (1) background regime profile uniformly distributed aerosols, represented by low particle concentrations as well distributions vertical axis...
Vertical profile measurements of aerosol properties in the lower atmosphere still constitute a major observational gap. Focusing on polar regions, where planetary boundary layer often forms temperature inversions that inhibit vertical mixing lowermost atmosphere, surface measure-ments can not represent further aloft. However, understanding distribution is critical for several reasons. From climate perspective, Arctic and Antarctic, cloud formation sensitive to availability. Because clouds...
Low-level mixed-phase clouds (LLMPCs) containing both ice and supercooled liquid water are ubiquitous in the Arctic play a crucial role for radiative fluxes. Mixed-phase inherently instable due to competition over between crystals droplets. The persistence of LLMPCs is challenging reproduce models, which affects predictions energy budget. These challenges stem from current uncertainties related complex web interactions aerosol particles, cloud microphysics, atmospheric (thermo-)dynamics...
Abstract. The importance of vertical wind velocities (in particular positive or updrafts) in atmospheric science has motivated the need to deploy multi-hole probes developed for manned aircraft small remotely piloted (RPA). In research, lightweight RPAs (< 2.5 kg) are now able accurately measure vectors, even a cloud, which provides essential observing tools understanding aerosol–cloud interactions. European project BACCHUS (impact Biogenic versus Anthropogenic emissions on Clouds and...
The international research program “ReNovRisk-CYCLONE” (RNR-CYC, 2017–2021) directly involves 20 partners from 5 countries of the south-west Indian-Ocean. It aims at improving observation and modelling tropical cyclones in Indian Ocean, as well to foster regional cooperation improve public policies adapted present future risk this cyclonic basin. This paper describes structure main objectives ambitious project, with emphasis on its observing components, which allowed integrating numbers...
Abstract. Top-down and bottom-up aerosol–cloud shortwave radiative flux closures were conducted at the Mace Head Atmospheric Research Station in Galway, Ireland, August 2015. This study is part of BACCHUS (Impact Biogenic versus Anthropogenic emissions on Clouds Climate: towards a Holistic UnderStanding) European collaborative project, with goal understanding key processes affecting to improve future climate predictions develop sustainable policies for Europe. Instrument platforms include...
Abstract. The science guiding the EUREC4A campaign and its measurements are presented. comprised roughly five weeks of in downstream winter trades North Atlantic – eastward south-eastward Barbados. Through ability to characterize processes operating across a wide range scales, marked turning point our observationally study factors influencing clouds trades, how they will respond warming, their link other components earth system, such as upper-ocean or, or life-cycle particulate matter. This...
OPINION article Front. Sustain., 09 February 2024Sec. Sustainable Organizations Volume 5 - 2024 | https://doi.org/10.3389/frsus.2024.1338660
Abstract. The main goal of the TRacking Aerosol Convection interactions ExpeRiment (TRACER) project was to further understand role that regional circulations and aerosol loading play in convective cloud life cycle across greater Houston, Texas, area. To accomplish this goal, United States Department Energy research partners collaborated deploy atmospheric observing systems region. Cloud precipitation radars, radiosondes, air quality sensors captured characteristics. A dense lower-atmospheric...
Abstract. In the framework of EU-FP7 BACCHUS (impact Biogenic versus Anthropogenic emissions on Clouds and Climate: towards a Holistic UnderStanding) project, an intensive field campaign was performed in Cyprus (March 2015). Remotely piloted aircraft system (RPAS), ground-based instruments, remote-sensing observations were operating parallel to provide integrated characterization aerosol–cloud interactions. (RPA) equipped with five-hole probe, pyranometers, pressure, temperature humidity...
The ReNovRisk-Cyclone program aimed at developing an observation network in the south-west Indian ocean (SWIO) close synergy with implementation of numerical tools to model and analyze impacts tropical cyclones (TC) present a context climate change. This paper addresses modeling part program. First, unique coupled system simulate TCs SWIO is developed. ocean–wave–atmosphere coupling considered along coherent between sea surface state, wind field, aerosol, microphysics, radiation. illustrated...
Abstract. This study analyzes turbulent energy fluxes in the Arctic atmospheric boundary layer (ABL) using measurements with a small uncrewed aircraft system (sUAS). Turbulent constitute major part of budget and influence surface heat balance by distributing vertically atmosphere. However, only few situ vertical profile ABL exist. The presents method to derive from DataHawk2 sUAS turbulence measurements, based on flux gradient parameterization exchange coefficient. is derived high-resolution...
Abstract Water is a critical resource that causes significant challenges to inhabitants of the western United States. These are likely intensify as result expanding population and climate-related changes act reduce runoff in areas complex terrain. To better understand physical processes drive transition mountain precipitation streamflow, National Oceanic Atmospheric Administration has deployed suites environmental sensors throughout East River watershed Colorado part Study Precipitation,...
As part of the Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC), HELiX uncrewed aircraft system (UAS) was deployed over sea ice in central Ocean during summer 2020. Albedo measurements were obtained with stabilized pyranometers, and melt pond fraction calculated from orthomosaic imagery a surface-imaging multispectral camera. This study analyzed flight data to provide insights on temporal spatial evolution albedo MOSAiC floe season as it drifted south through Fram...
Abstract. Between 24 January and 15 February 2020, small uncrewed aircraft systems (sUAS) were deployed to Morgan Lewis (Barbados) as part of the Atlantic Tradewind Ocean-Atmosphere Mesoscale Interaction Campaign (ATOMIC), a sister project ElUcidating RolE Cloud-Circulation Coupling in ClimAte (EUREC4A) project. The observations from ATOMIC EUREC4A aimed at improving our understanding trade-wind cumulus clouds environmental regimes supporting them, involved deployment wide variety...
In this article, we present an overview of the HyIV-CNRS-SecORo (Hydralab IV-CNRS-Secondary Orography and Rotors Experiments) laboratory experiments carried out in CNRM (Centre National de Recherches Météorologiques) large stratified water flume. The were designed to systematically study influence double obstacles on stably flow. experimental set-up consists a two-layer flow tank, with lower neutral upper stable layer separated by sharp density discontinuity. This type layering over terrain...
Abstract. Top-down and bottom-up aerosol-cloud-radiative flux closures were conducted at the Mace Head atmospheric research station in Galway, Ireland August 2015. This study is part of BACCHUS (Impact Biogenic versus Anthropogenic emissions on Clouds Climate: towards a Holistic UnderStanding) European collaborative project, with goal understanding key processes affecting to improve future climate predictions develop sustainable policies for Europe. Instrument platforms include ground-based,...