A5028414898- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Atmospheric aerosols and clouds
- High-pressure geophysics and materials
- Geological and Geophysical Studies
- Methane Hydrates and Related Phenomena
- Climate variability and models
- Seismic Waves and Analysis
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- Cryospheric studies and observations
- Geological and Geophysical Studies Worldwide
- Geochemistry and Geologic Mapping
- Air Quality Monitoring and Forecasting
- Tree-ring climate responses
- Earthquake Detection and Analysis
- Geology and Paleoclimatology Research
- Tropical and Extratropical Cyclones Research
- Spaceflight effects on biology
- Climate Change and Geoengineering
- Abdominal Trauma and Injuries
- French Urban and Social Studies
Laboratoire d'Optique Atmosphérique
2015-2024
Université de Lille
2015-2024
Centre National de la Recherche Scientifique
2013-2024
Library of America
2022
Laboratoire de Recherche Scientifique
2019
Laboratoire de Météorologie Dynamique
2013-2016
École Polytechnique
2013-2016
Sorbonne Université
2016
École Normale Supérieure - PSL
2013-2014
University of Cambridge
2009-2013
Abstract The underwater Hunga Tonga-Hunga Ha-apai volcano erupted in the early hours of 15th January 2022, and injected volcanic gases aerosols to over 50 km altitude. Here we synthesise satellite, ground-based, situ radiosonde observations eruption investigate strength stratospheric aerosol water vapour perturbations initial weeks after quantify net radiative impact across two species using offline transfer modelling. We find that produced largest global perturbation since Pinatubo 1991...
Abstract. Depending on the magnitude of their eruptions, volcanoes impact atmosphere at various temporal and spatial scales. The volcanic source remains a major unknown to rigorously assess these impacts. At scale an eruption, limited knowledge parameters, including time variations erupted mass flux emission profile, currently represents greatest issue that limits reliability cloud forecasts. Today, growing number satellite remote sensing observations distant plumes are becoming available,...
Abstract. In this paper we combine SO2 and ash plume dispersion modelling with satellite surface remote sensing observations to study the regional influence of a relatively weak volcanic eruption from Mount Etna on optical micro-physical properties Mediterranean aerosols. We analyse episode 25–27 October 2013. The evolution along trajectory is investigated by means FLEXible PARTicle Lagrangian (FLEXPART) model. data set includes true colour images, retrieved values ash, estimates emission...
Abstract Eruptive activity shapes volcanic edifices. The formation of broad caldera depressions is often associated with major collapse events, emplacing conspicuous pyroclastic deposits. However, subsidence may also proceed silently by magma withdrawal at depth, more difficult to detect. Ambrym, a basaltic island, hosts 12-km wide and several intensely-degassing lava lakes confined intra-caldera cones. Using satellite remote sensing deformation, gas emissions thermal anomalies, combined...
Abstract The underwater Hunga Tonga-Hunga Ha-apai (HT) volcano violently erupted on January 15th, 2022, injecting volcanic gases and aerosols at over 50 km altitude. Here we show the stratospheric aerosol water vapour perturbations due to HT eruption, plume evolution during first month dispersion estimate its short-term radiative impact. eruption produced largest perturbation of since Pinatubo in 1991. During three weeks following cooling dominates plume’s heating/cooling rates, reaching...
Abstract Stratospheric sulfate aerosols play a key role on atmospheric chemistry and Earth’s radiation budget, but their size distribution, critical parameter in climate models, is generally poorly known. We address such gap for the 2022 Hunga Tonga–Hunga Ha'apai (HT–HH) volcanic eruption by exhaustively analyzing set of satellite observations (TROPOMI, IASI, AHI, CALIOP) together with photometric ground from worldwide open‐access AERONET network. document rapid growth HT–HH days following...
The open access VOLCPLUME web platform (https://volcplume.aeris-data.fr) is part of the Volcano Space Observatory portal under development within framework Horizon Europe EOSC FAIR EASE project. This interface aims at supporting near-real-time monitoring volcanic emissions and multi-scale analysis plumes in atmosphere from local to global scales (Boichu Mathurin, 2022).To reach this goal, allows users jointly analyse a broad set satellite ground-based active/passive remote sensing...
Under the umbrella of EOSC ecosystem, FAIR-EASE project funded under HORIZON-INFRA-2021-EOSC-01-04 aims to facilitate access interoperable data and services for earth environmental multi-disciplinary use cases, demonstrating capabilities support open science (https://fairease.eu/). Based on three its pilots more specifically: Volcano Space Observatory pilot, Ocean Biogeochemical Observations pilot Coastal Dynamic partners would like highlight both synergy new emerging interdisciplinary...
Forecasting the dispersal of volcanic clouds during an eruption is primary importance, especially for ensuring aviation safety. As emissions are characterized by rapid variations emission rate and height, (generally) high level uncertainty in parameters represents a critical issue that limits robustness cloud forecasts. An inverse modeling scheme, combining satellite observations with regional chemistry-transport model, allows reconstructing this source term at temporal resolution. We...
Abstract. This paper uses a method of atmospheric flow analogues to reconstruct an ensemble variables (namely sea-level pressure, surface temperature and wind speed) between 1781 1785. The properties this are investigated tested against observations temperature. goal the is assess whether circulation during Laki volcanic eruption (in 1783) subsequent winter were similar conditions that prevailed in 2009/2010 spring 2010. We find 3 months following June 1783 barely had cold 1783/1784 yielded...
Abstract. Volcanic sulfate aerosols play a key role in air quality and climate. However, the rate of oxidation sulfur dioxide (SO2) precursor gas to (SO42-) volcanic plumes is poorly known, especially troposphere. Here we determine chemical speciation as well intensity temporal persistence impact on from 2014–2015 Holuhraun flood lava eruption Icelandic volcano Bárðarbunga. To do so, jointly analyse set SO2 observations satellite (OMPS IASI) ground-level measurements monitoring stations...
Abstract. Sulfur-rich degassing, which is mostly composed of sulfur dioxide (SO2), plays a major role in the overall impact volcanism on atmosphere and climate. The accurate assessment this currently hampered by poor knowledge volcanic SO2 emissions. Here, using an inversion procedure, we show how assimilating snapshots load derived from Infrared Atmospheric Sounding Interferometer (IASI) allows for reconstructing both flux altitude emissions with hourly resolution. For purpose, regional...
Abstract. The 2014–2015 Holuhraun lava-flood eruption of Bárðarbunga volcano (Iceland) emitted prodigious amounts sulfur dioxide into the atmosphere. This caused a large-scale episode air pollution throughout Western Europe in September 2014, first event this magnitude recorded modern era. We gathered chemistry-transport simulations and wealth complementary observations from satellite sensors (OMI, IASI), ground-based remote sensing (lidar, sunphotometry, differential optical absorption...
Abstract Understanding the dynamics of sulfur dioxide (SO 2 ) degassing is primary importance for tracking temporal variations in volcanic activity. Here we introduce novel “disk method,” which aims at estimating daily SO mass flux from satellite images (such as those provided by Sentinel‐5P/TROPOspheric Monitoring Instrument [TROPOMI]). The method calculates a “proto‐flux” using regression, function distance, integrated series nested circular domains centered on volcano. After single...
Episodic magmatic degassing has been observed at numerous volcanoes, especially those of intermediate composition. It can span timescales from years to decades. Here we propose a physical model for the shallow magma intrusion explain this phenomenon. The cools by convection, which leads melt crystallization, volatile exsolution, and overpressure. When pressure reaches critical value, wall rocks fracture exsolved gas escapes. then returns initial lithostatic new...
Abstract Surface deformation accompanying dike intrusions is dominated by uplift and horizontal motion directly related to the intrusions. In some cases, it includes subsidence due associated magma reservoir deflation. When deflation large enough, can form, or reactivate preexisting, caldera ring‐faults. Ring‐fault reactivation, however, rarely observed during moderate‐sized eruptions. On February 21, 2015 at Ambrym volcano in Vanuatu, a basaltic intrusion produced more than 1 m of...