Titre :

Small-scale volcanic aerosols variability, processes and direct radiative impact at Mount Etna during the EPL-RADIO campaigns

Auteur(s) :

Sellitto, Pasquale [Auteur]
Laboratoire Interuniversitaire des Systèmes Atmosphériques [LISA (UMR_7583)]
Salerno, Giuseppe [Auteur]
Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania [INGV]
La Spina, Alessandro [Auteur]
Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania [INGV]
Caltabiano, Tommaso [Auteur]
Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania [INGV]
Scollo, Simona [Auteur]
Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania [INGV]
Boselli, Antonella [Auteur]
Istituto di Metodologie per l'Analisi Ambientale [IMAA]
Leto, Giuseppe [Auteur]
Istituto Nazionale di Astrofisica [INAF]
Zanmar Sanchez, Ricardo [Auteur]
Istituto Nazionale di Astrofisica [INAF]
Crumeyrolle, Suzanne [Auteur]
Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Hanoune, Benjamin [Auteur]
Physicochimie des Processus de Combustion et de l’Atmosphère - UMR 8522 [PC2A]
Briole, Pierre [Auteur]
Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania [INGV]
Laboratoire de géologie de l'ENS [LGENS]

Titre de la revue :

Scientific Reports

Nom court de la revue :

Sci Rep

Numéro :

10

Éditeur :

Springer Science and Business Media LLC

Date de publication :

2020-09-16

ISSN :

2045-2322

Mot(s)-clé(s) en anglais :

Atmospheric chemistry
Atmospheric optics
Environmental impact
Geochemistry
Volcanology

Discipline(s) HAL :

Physique [physics]/Physique [physics]
Physique [physics]/Physique [physics]/Chimie-Physique [physics.chem-ph]
Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

The aerosol properties of Mount Etna’s passive degassing plume and its short-term processes and radiative impact were studied in detail during the EPL-RADIO campaigns (summer 2016–2017), using a synergistic combination of ...
Lire la suite >The aerosol properties of Mount Etna’s passive degassing plume and its short-term processes and radiative impact were studied in detail during the EPL-RADIO campaigns (summer 2016–2017), using a synergistic combination of observations and radiative transfer modelling. Summit observations show extremely high particulate matter concentrations. Using portable photometers, the first mapping of small-scale (within ∼20km from the degassing craters) spatial variability of the average size and coarse-to-fine burden proportion of volcanic aerosols is obtained. A substantial variability of the plume properties is found at these spatial scales, revealing that processes (e.g. new particle formation and/or coarse aerosols sedimentation) are at play, which are not represented with current regional scale modelling and satellite observations. Statistically significant progressively smaller particles and decreasing coarse-to-fine particles burden proportion are found along plume dispersion. Vertical structures of typical passive degassing plumes are also obtained using observations from a fixed LiDAR station constrained with quasi-simultaneous photometric observations. These observations are used as input to radiative transfer calculations, to obtain the shortwave top of the atmosphere (TOA) and surface radiative effect of the plume. For a plume with an ultraviolet aerosol optical depth of 0.12–0.14, daily average radiative forcings of −4.5 and −7.0W/m2, at TOA and surface, are found at a fixed location ∼7km downwind the degassing craters. This is the first available estimation in the literature of the local radiative impact of a passive degassing volcanic plume.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Non spécifiée

Établissement(s) :

Université de Lille
CNRS

Collections :

• Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
• Physicochimie des Processus de Combustion et de l'Atmosphère (PC2A) - UMR 8522

Équipe(s) de recherche :

PhysicoChimie de l'Atmosphère (PCA)

Date de dépôt :

2020-10-07T07:47:26Z
2020-10-08T05:39:25Z
2020-10-08T05:40:54Z
2020-10-08T07:28:30Z
2020-10-21T08:06:24Z