A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions

This work presents a new database of SO2 and CO2 fluxes from the Southern Central American Volcanic Arc (SCAVA) for the period 2015–2016. We report 300 SO2 flux measurements from 10 volcanoes and gas ratios from 11 volcanoes in Costa Rica and Nicaragua representing the most extensive available asse...

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Main Authors: Muller, C., Saballos, A., Ibarra, M., LaFemina, Peter, de Moor, Joost Maarten, Kern, Christoph, Avard, Geoffroy, AIUPPA, Alessandro, Protti, Marino, Fischer, Tobias
Format: Artículo
Language: Inglés
Published: AGU Publications 2022
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Online Access: http://hdl.handle.net/11056/23594
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spelling RepoUNACR235942022-12-27T17:28:44Z A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions Muller, C. Saballos, A. Ibarra, M. LaFemina, Peter de Moor, Joost Maarten Kern, Christoph Avard, Geoffroy AIUPPA, Alessandro Protti, Marino Fischer, Tobias VULCANOLOGÍA VOLCANIC ERUPTIONS GEOLOGÍA VULCANOLOGY ERUPCIONES VOLCÁNICAS GEOLOGY This work presents a new database of SO2 and CO2 fluxes from the Southern Central American Volcanic Arc (SCAVA) for the period 2015–2016. We report 300 SO2 flux measurements from 10 volcanoes and gas ratios from 11 volcanoes in Costa Rica and Nicaragua representing the most extensive available assessment of this 500 km arc segment. The SO2 flux from SCAVA is estimated at 6,24061,150 T/d, about a factor of three higher than previous estimations (1972–2013). We attribute this increase in part to our more complete assessment of the arc. Another consideration in interpreting the difference is the context of increased volcanic activity, as there were more eruptions in 2015–2016 than in any period since 1980. A potential explanation for increased degassing and volcanic activity is a change in crustal stress regime (from compression to extension, opening volcanic conduits) following two large (Mw>7) earthquakes in the region in 2012. The CO2 flux from the arc is estimated at 22,50064,900 T/d, which is equal to or greater than estimates of C input into the SCAVA subduction zone. Time-series data sets for arc degassing need to be improved in temporal and spatial coverage to robustly constrain volatile budgets and tectonic controls. Arc volatile budgets are strongly influenced by short-lived degassing events and arc systems likely display significant short-term variations in volatile output, calling for expansion of nascent geochemical monitoring networks to achieve spatial and temporal coverage similar to traditional geophysical networks. Este trabajo presenta una nueva base de datos de flujos de SO2 y CO2 del Centro Sur Arco Volcánico Americano (SCAVA) para el período 2015-2016. Informamos de 300 mediciones de flujo de SO2 de 10 volcanes y proporciones de gas de 11 volcanes de Costa Rica y Nicaragua que representan la mayor parte de los amplia evaluación disponible de este segmento de arco de 500 km. El flujo de SO2 de SCAVA se estima en 6.240 6 1.150 T/d, aproximadamente un factor de tres superior a las estimaciones anteriores (1972-2013). Atribuimos esto aumento en parte a nuestra evaluación más completa del arco. Otra consideración en la interpretación de la diferencia es el contexto de una mayor actividad volcánica, ya que en 2015-2016 hubo más erupciones que en cualquier período desde 1980. Una posible explicación del aumento de la desgasificación y la actividad volcánica es un cambio en el régimen de estrés de la corteza (de compresión a extensión, apertura de conductos volcánicos) después de dos grandes (Mw > 7) terremotos en la región en 2012. El flujo de CO2 del arco se estima en 22.500 6 4.900 T/d, que es igual o mayor que las estimaciones de la entrada de C en la subducción del SCAVA zona. Los conjuntos de datos de series temporales para la desgasificación del arco deben mejorarse en la cobertura temporal y espacial para restringir fuertemente los presupuestos volátiles y los controles tectónicos. Los presupuestos volátiles del arco están fuertemente influenciados por los eventos de desgasificación de corta duración y los sistemas de arco probablemente muestren importantes variaciones a corto plazo en la volatilidad de la producción, lo que exige la expansión de las nacientes redes de vigilancia geoquímica para lograr la cobertura temporal similar a las redes geofísicas tradicionales. Universidad Nacional, Costa Rica University of New Mexico, Albuquerque, NM, USA Cascades Volcano Observatory, U.S. Geological Survey, Vancouver, WA, USA Universita di Palermo, Palermo, Italy Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Italy Dirección de Vulcanología, Instituto Nicaragüense de EstudiosTerritoriales (INETER), Managua, Nicaragua The Pennsylvania State University, University Park, PA, USA Observatorio Vulcanológico y Sismológico de Costa Rica Cascades Volcano Observatory, U.S. Geological Survey, Vancouver, WA, USA Dipartimento DiSTeM, Universita di Palermo, Palermo, Italy Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Italy Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM, USA 6 Dirección de Vulcanología, Instituto Nicaragüense de Estudios € Territoriales (INETER), Managua, Nicaragua Department of Geosciences, The Pennsylvania State University, University Park, PA, USA 2022-07-19T21:29:30Z 2022-07-19T21:29:30Z 2017-12-12 http://purl.org/coar/resource_type/c_6501 1525-2027 http://hdl.handle.net/11056/23594 10.1002/2017GC007141 eng Acceso abierto http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf AGU Publications Geochemistry, Geophysics, Geosystems 18 4437–4468 2017
institution Universidad Nacional de Costa Rica
collection Repositorio UNA-Costa Rica
language Inglés
topic VULCANOLOGÍA
VOLCANIC ERUPTIONS
GEOLOGÍA
VULCANOLOGY
ERUPCIONES VOLCÁNICAS
GEOLOGY
spellingShingle VULCANOLOGÍA
VOLCANIC ERUPTIONS
GEOLOGÍA
VULCANOLOGY
ERUPCIONES VOLCÁNICAS
GEOLOGY
Muller, C.
Saballos, A.
Ibarra, M.
LaFemina, Peter
de Moor, Joost Maarten
Kern, Christoph
Avard, Geoffroy
AIUPPA, Alessandro
Protti, Marino
Fischer, Tobias
A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions
description This work presents a new database of SO2 and CO2 fluxes from the Southern Central American Volcanic Arc (SCAVA) for the period 2015–2016. We report 300 SO2 flux measurements from 10 volcanoes and gas ratios from 11 volcanoes in Costa Rica and Nicaragua representing the most extensive available assessment of this 500 km arc segment. The SO2 flux from SCAVA is estimated at 6,24061,150 T/d, about a factor of three higher than previous estimations (1972–2013). We attribute this increase in part to our more complete assessment of the arc. Another consideration in interpreting the difference is the context of increased volcanic activity, as there were more eruptions in 2015–2016 than in any period since 1980. A potential explanation for increased degassing and volcanic activity is a change in crustal stress regime (from compression to extension, opening volcanic conduits) following two large (Mw>7) earthquakes in the region in 2012. The CO2 flux from the arc is estimated at 22,50064,900 T/d, which is equal to or greater than estimates of C input into the SCAVA subduction zone. Time-series data sets for arc degassing need to be improved in temporal and spatial coverage to robustly constrain volatile budgets and tectonic controls. Arc volatile budgets are strongly influenced by short-lived degassing events and arc systems likely display significant short-term variations in volatile output, calling for expansion of nascent geochemical monitoring networks to achieve spatial and temporal coverage similar to traditional geophysical networks.
format Artículo
author Muller, C.
Saballos, A.
Ibarra, M.
LaFemina, Peter
de Moor, Joost Maarten
Kern, Christoph
Avard, Geoffroy
AIUPPA, Alessandro
Protti, Marino
Fischer, Tobias
author_sort Muller, C.
title A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions
title_short A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions
title_full A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions
title_fullStr A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions
title_full_unstemmed A New Sulfur and Carbon Degassing Inventory for the Southern Central American Volcanic Arc: The Importance of Accurate Time-Series Data Sets and Possible Tectonic Processes Responsible for Temporal Variations in Arc-Scale Volatile Emissions
title_sort new sulfur and carbon degassing inventory for the southern central american volcanic arc: the importance of accurate time-series data sets and possible tectonic processes responsible for temporal variations in arc-scale volatile emissions
publisher AGU Publications
publishDate 2022
url http://hdl.handle.net/11056/23594
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score 12.24763