Title :

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

Author(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]

Journal title :

Scientific Reports

Abbreviated title :

Sci Rep

Volume number :

10

Publisher :

Springer Science and Business Media LLC

Publication date :

2020-09-16

ISSN :

2045-2322

English keyword(s) :

Atmospheric chemistry
Atmospheric optics
Environmental impact
Geochemistry
Volcanology

HAL domain(s) :

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

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Non spécifiée

Administrative institution(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

Research team(s) :

PhysicoChimie de l'Atmosphère (PCA)

Submission date :

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