Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/11073
DC Field | Value | Language |
---|---|---|
dc.date.accessioned | 2018-03-07T11:23:43Z | en |
dc.date.available | 2018-03-07T11:23:43Z | en |
dc.date.issued | 2016 | en |
dc.identifier.uri | http://hdl.handle.net/2122/11073 | en |
dc.description.abstract | Volcanic eruptions involving interaction with water are amongst the most violent and unpredictable geologic phenomena on Earth. Phreatic eruptions are exceptionally difficult to forecast by traditional geophysical techniques. Here we report on short-term precursory variations in gas emissions related to phreatic blasts at Poás volcano, Costa Rica, as measured with an in situ multiple gas analyzer that was deployed at the edge of the erupting lake. Gas emitted from this hyper-acid crater lake approaches magmatic values of SO2/CO2 1–6 days prior to eruption. The SO2 flux derived from magmatic degassing through the lake is measureable by differential optical absorption spectrometry (sporadic campaign measurements), which allows us to constrain lake gas output and input for the major gas species during eruptive and non-eruptive periods. We can further calculate power supply to the hydrothermal system using volatile mass balance and thermodynamics, which indicates that the magmatic heat flux into the shallow hydrothermal system increases from ∼27 MW during quiescence to ∼59 MW during periods of phreatic events. These transient pulses of gas and heat from the deeper magmatic system generate both phreatic eruptions and the observed short-term changes in gas composition, because at high gas flux scrubbing of sulfur by the hydrothermal system is both kinetically and thermodynamically inhibited whereas CO2 gas is always essentially inert in hyperacid conditions. Thus, the SO2/CO2 of lake emissions approaches magmatic values as gas and power supply to the sub-limnic hydrothermal system increase, vaporizing fluids and priming the hydrothermal system for eruption. Our results suggest that highfrequency real-time gas monitoring could provide useful short-term eruptive precursors at volcanoes prone to phreatic explosions | en |
dc.language.iso | English | en |
dc.relation.ispartof | Earth and Planetary Science Letters | en |
dc.relation.ispartofseries | /442 (2016) | en |
dc.title | Short-period volcanic gas precursors to phreatic eruptions: Insights from Poás Volcano, Costa Rica | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 218-227 | en |
dc.subject.INGV | 04.08. Volcanology | en |
dc.identifier.doi | 10.1016/j.epsl.2016.02.056 | en |
dc.description.obiettivoSpecifico | 2V. Struttura e sistema di alimentazione dei vulcani | en |
dc.description.obiettivoSpecifico | 4V. Dinamica dei processi pre-eruttivi | en |
dc.description.obiettivoSpecifico | 5V. Dinamica dei processi eruttivi e post-eruttivi | en |
dc.description.obiettivoSpecifico | 6V. Pericolosità vulcanica e contributi alla stima del rischio | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | de Moor, J. M. | en |
dc.contributor.author | Aiuppa, Alessandro | en |
dc.contributor.author | Pacheco, J. | en |
dc.contributor.author | Avard, G. | en |
dc.contributor.author | Kern, C. | en |
dc.contributor.author | Liuzzo, Marco | en |
dc.contributor.author | Martínez, M. | en |
dc.contributor.author | Giudice, Gaetano | en |
dc.contributor.author | Fischer, T. P. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Observatorio Vulcanol ogico y Sismol ogico de Costa Rica (OVSICORI) | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | - |
crisitem.author.dept | Observatorio Vulcanologico y Sismologico de Costa Rica, Costa Rica | - |
crisitem.author.dept | U.S. Geological Survey, Cascades Volcano Observatory, 1300 SE Cardinal Ct S100, Vancouver, Washington 98683, USA | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Palermo, Palermo, Italia | - |
crisitem.author.dept | Observatorio Vulcanológico y Sismológico de Costa Rica Universidad Nacional, Heredia, Costa Rica | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.orcid | 0000-0002-0254-6539 | - |
crisitem.author.orcid | 0000-0002-3099-7505 | - |
crisitem.author.orcid | 0000-0002-9410-4139 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
deMoo_POAS_.pdf | 1.55 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
20
54
checked on Feb 10, 2021
Page view(s)
155
checked on Apr 24, 2024
Download(s)
6
checked on Apr 24, 2024