Emisión difusa de CO2 y actividad volcánica en el volcán Poás, Costa Rica

Melián, Gladys V.; Pérez, Nemesio M.; Hernández, Pedro A.; Nolasco, D.; Marrero, Rayco; Fernández, Mario; Ramírez, Carlos; Mora‐Amador, Raúl; Alvarado, Guillermo E.

doi:10.15517/rgac.v0i43.3462

Cited by 2 publications

(7 citation statements)

References 34 publications

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“…First, the total diffuse gas was computed as 0.9 ± 0.5 t/d, which is a comparatively low value. For example, the lowest diffuse CO 2 budget found by Melián et al (2010) was 164 ± 15 t/d in 2,000 over an area of 3,200,000 m 2 , which leads to a value of 38 ± 4 t/d when scaled to the area investigated in this work (734,000 m 2 ). A comparison of results between this survey and that of Melián et al (2010) are presented in Table 2.…”

Section: Discussion Poásmentioning

confidence: 67%

“…For example, the lowest diffuse CO 2 budget found by Melián et al (2010) was 164 ± 15 t/d in 2,000 over an area of 3,200,000 m 2 , which leads to a value of 38 ± 4 t/d when scaled to the area investigated in this work (734,000 m 2 ). A comparison of results between this survey and that of Melián et al (2010) are presented in Table 2. The difference could be partially due to the better spatial resolution of our study which confines each anomaly to a smaller area.…”

Section: Discussion Poásmentioning

confidence: 67%

“…In our case, Turrialba volcano has experienced a reawakening process which has lasted ∼20 years (Martini et al, 2010;de Moor et al, 2016a) and Poás' activity is particularly variable (Fischer et al, 2015;de Moor et al, 2016b) and seems to have stages of enhanced volcanic activity and stages of quiescence that alternate every 6-12 years (Rymer et al, 2000(Rymer et al, , 2005(Rymer et al, , 2009. Diffuse degassing monitoring could thus be an interesting tool for long term monitoring (Allard et al, 1991;Chiodini et al, 1996Chiodini et al, , 1998Chiodini et al, , 2001Giammanco et al, 1998;Hernández et al, 1998Hernández et al, , 2001Melián et al, 2001Melián et al, , 2010Salazar et al, 2001;Shimoike et al, 2002;Hernández Perez et al, 2003;Carapezza and Granieri, 2004;Galindo et al, 2004;Lewicki et al, 2005;Notsu et al, 2006;Werner and Cardellini, 2006;Carapezza et al, 2009;Viveiros et al, 2010;Peltier et al, 2012;Werner et al, 2014).…”

Section: Introductionmentioning

confidence: 64%

“…But such an explanation may be not sufficient to explain the observed difference. Secondly, the maximum ground temperature value among all measurement points is 19.3 • C. By comparison, temperatures up to about 92 • C were recorded at 40 cm depth at some locations each year of the 2000-2003 campaigns of Melián et al (2010). Hence, no thermal anomaly was recorded in 2012.…”

Section: Discussion Poásmentioning

confidence: 86%

“…The main aim of this study is thus to quantify total CO 2 flux emissions for Turrialba (10. (Melián et al, , 2010Galindo et al, 2004;Aiuppa et al, 2014) in order to highlight the evolution of volcanic activity over time. Turrialba, Poás, and Irazú volcanoes are three active Costa Rican volcanoes near the capital city of San José.…”

Section: Introductionmentioning

confidence: 99%

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Relationship between Diffuse CO2 Degassing and Volcanic Activity. Case Study of the Poás, Irazú, and Turrialba Volcanoes, Costa Rica

et al. 2017

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Active volcanoes exhibit diffuse gas emanations through the ground, the most abundant species of which is CO 2 . However, the relationship between diffuse degassing and volcanic activity is not often clear and some volcanoes may have low diffuse degassing levels despite having strong volcanic activity. The main goals of this study are to quantify diffuse CO 2 degassing and determine whether patterns exist in relation to volcanic activity through the study of Turrialba, Poás, and Irazú, three active volcanoes in Costa Rica which are at different stages of activity. Structural controls of spatial distribution of diffuse degassing were also investigated. Measurement campaigns were conducted using the accumulation chamber method coupled with 10 cm depth ground temperature sampling with the aim of estimating the total diffuse CO 2 degassing budget. The total amount of CO 2 emitted diffusely by each volcano is ∼113 ± 46 t/d over ∼0.705 km 2 for Turrialba, 0.9 ± 0.5 t/d for Poás over ∼0.734 km 2 , 3.8 ± 0.9 t/d over ∼0.049 km 2 for Irazú's main crater, and 15 ± 12 t/d over 0.0059 km 2 for Irazú's north flank. Turrialba and Poás volcano diffuse degassing budget represent about 10% of the whole gas output. Both volcanoes were in a transitional stage and the opening of new conduits may cause a loss in diffuse degassing and an increase of active degassing. Numerous diffuse degassing structures were also identified. At Turrialba, one of which was closely associated with the collapse of a crater wall in 2014 during the initiation of a new period of heightened eruptive activity. Similar structures were also observed on the outer slopes of the west crater, suggesting strong alteration and perhaps destabilization of the upper outer cone. Irazú's north flank is highly permeable and has experienced intense hydrothermal alteration.

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Section: Discussion Poásmentioning

confidence: 67%

Section: Discussion Poásmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 64%

Section: Discussion Poásmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Relationship between Diffuse CO2 Degassing and Volcanic Activity. Case Study of the Poás, Irazú, and Turrialba Volcanoes, Costa Rica

et al. 2017

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Cartografía De Afectación Por Amenazas Naturales en El Cantón De Poás, Costa Rica

Castillo

Quesada‐Román

2016

REVGEO

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A pesar de la existencia de reportes históricos, recopilaciones, bases de datos e informes, no se dispone en el país de un estudio que sintetice y distribuya espacialmente la información sobre afectación histórica por amenazas naturales. Por medio de una compilación y georreferenciación de toda la información disponible sobre impactos por amenazas naturales en el cantón de Poás, fue posible construir indicadores espaciales de afectación para los eventos registrados (caída de ceniza, gases volcánicos, terremotos, inundaciones y deslizamientos). Estos fueron estandarizados en cinco clases (muy baja, baja, moderada, alta y muy alta), con lo que se construyó un indicador de máxima afectación por eventos naturales históricos para dicha unidad política- administrativa a partir de la sobreposición de los registros de desastres. El resultado de este estudio muestra una tendencia al incremento de las afectaciones por amenazas naturales de sur a norte, lo que es consecuente con la distribución de las lluvias, las pendientes, así como la proximidad con fuentes sísmicas y volcánicas. Un patrón distinto mostraron las inundaciones rápidas y los deslizamientos que se relacionan con la presencia de valles fluviales encañonados con fuertes pendientes en microcuencas alargadas y pequeñas sobre depósitos volcánicos recientes.

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Emisión difusa de CO2 y actividad volcánica en el volcán Poás, Costa Rica

Cited by 2 publications

References 34 publications

Relationship between Diffuse CO2 Degassing and Volcanic Activity. Case Study of the Poás, Irazú, and Turrialba Volcanoes, Costa Rica

Relationship between Diffuse CO2 Degassing and Volcanic Activity. Case Study of the Poás, Irazú, and Turrialba Volcanoes, Costa Rica

Cartografía De Afectación Por Amenazas Naturales en El Cantón De Poás, Costa Rica

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