GMPV8.7 | Volcanic degassing
EDI
Volcanic degassing
Convener: Marco Liuzzo | Co-conveners: Nicole Bobrowski, Jonas Kuhn
Orals
| Tue, 16 Apr, 14:00–15:45 (CEST)
 
Room -2.33
Posters on site
| Attendance Mon, 15 Apr, 10:45–12:30 (CEST) | Display Mon, 15 Apr, 08:30–12:30
 
Hall X1
Orals |
Tue, 14:00
Posters on site
Mon, 10:45
Magma composition, eruptive frequency, and tectonic context are highly variable features of volcanoes. Within such contexts, volcanic volatiles play a key role in magma transport, and impact on the style and timing of volcanic eruptions. Gas chemical and isotopic compositions may change over time, reflecting variations in the magmatic feeding systems of volcanoes. As the magma rises from depth, the decreasing pressure allows volatile species to partition into the gas phase. Bubbles form, grow, and coalesce, and gases start to flow through the vesciculated magma. Eventually, fluid and gases reach the surface and are released into the atmosphere through soil degassing, fumarolic vents, or bubbling through a water surface, forming large plumes or explosive eruption columns.

Volcanic emissions can also have significant impacts on the terrestrial environment, atmospheric composition, climate, and human health at various temporal and spatial scales. For instance, sulfur dioxide emissions can cause acid rain and influence aerosol formation, and if an eruption column reaches the stratosphere, it causes global dimming and a lowering of the Earth’s surface temperatures that may last for years. Similarly, halogens can dramatically affect proximal ecosystems, influence the oxidation capacity of the troposphere, and alter the stratospheric ozone layer.

Understanding the physicochemical processes underlying volcanic eruptions has improved tremendously through major advances in computational and analytical capabilities, instrumentation and monitoring networks, thereby improving the ability to reduce volcanic hazards. This session focuses on all aspects of volcanic volatile degassing in the Earth’s system through case studies and theoretical and multidisciplinary approaches. We invite contributions discussing how novel measurement techniques, field measurements, direct and remote ground and space-based observations, and modeling studies of volcanic degassing can provide new insights into volcanic and atmospheric processes at local and global scales.
Finally, but significantly, we strongly encourage critical contributions that offer alternative explanations and viewpoints, willingness to consider new ideas supported by evidence, and with the potential to improve the ability to forecast eruptions.

Orals: Tue, 16 Apr | Room -2.33

Chairpersons: Marco Liuzzo, Nicole Bobrowski, Jonas Kuhn
14:00–14:05
5-minute convener introduction
EGU24-9803
|
On-site presentation
Inverting thermal imagery of fumarole plumes to reveal gas fluxes
David Jessop and Amelie Klein
EGU24-15866
|
ECS
|
On-site presentation
Monitoring of rainwater chemistry during the recent volcanic unrest at Vulcano Island (Italy)
Francesco Tripodi et al.
EGU24-7544
|
ECS
|
Virtual presentation
Post-eruptive emission of metals and metalloids from basaltic lavas
Nicolas Levillayer et al.

Posters on site: Mon, 15 Apr, 10:45–12:30 | Hall X1

Display time: Mon, 15 Apr 08:30–Mon, 15 Apr 12:30
Chairpersons: Marco Liuzzo, Nicole Bobrowski, Jonas Kuhn
EGU24-17761
|
ECS
|
On-site presentation
Boron and strontium isotopic signature in rainwaters from Mt. Etna, Italy
Filippo Brugnone et al.
EGU24-19466
|
ECS
|
On-site presentation
Combining scanning-DOAS and SO2 camera observations leads to more robust volcanic SO2 flux records.
Giovanni Lo Bue Trisciuzzi et al.
EGU24-18297
|
ECS
|
OSPP
|
On-site presentation
Dissolved Helium Estimation in the Casaglia Geothermal Reservoir: a Geological Active Area
Silvia Balzan et al.
EGU24-20543
|
On-site presentation
Do gas fluxes from numerical modeling and from field data match ?
Marielle Collombet et al.
EGU24-16089
|
ECS
|
OSPP
|
On-site presentation
H2O-vesicle formation in the hybrid region of a bimodal melt system. An experimental progress.
Laura Luenenschloss et al.