Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain
Fluctuations of trace gas activity as a response to variations in weather and microclimate conditions were monitored over a year in a shallow volcanic cave (Painted Cave, Galdar, Canary Islands, Spain). 222Rn concentration was used due to its greater sensitivity to hygrothermal variations than CO2 concentration. Radon concentration in the cave increases as effective vapour condensation within the porous system of the rock surfaces inside the cave increases due to humidity levels of more than 70%. Condensed water content in pores was assessed and linked to a reduction in the direct passage of trace gases. Fluctuations in radon activity as a response to variations in weather and microclimate conditions were statistically identified by clustering entropy changes on the radon signal and parameterised to predict radon concentration anomalies. This raises important implications for other research fields, including the surveillance of shallow volcanic and seismic activity, preventive conservation of cultural heritage in indoor spaces, indoor air quality control and studies to improve understanding of the role of subterranean terrestrial ecosystems as reservoirs and/or temporary sources of trace gases.
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Format: | artículo biblioteca |
Language: | English |
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Elsevier
2013-04-19
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Subjects: | Radon Anomalies, Underground Cavities, Subsoil Monitoring, Gas Diffusion, Vapour Condensation, |
Online Access: | http://hdl.handle.net/10261/178512 |
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dig-ipna-es-10261-1785122022-06-02T10:39:27Z Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain Fernández-Cortés, Ángel Benavente, D. Cuezva, Soledad Cañaveras, Juan Carlos Álvarez-Gallego, Miriam García-Antón, E. Soler, Vicente Sánchez Moral, Sergio Gobierno de Canarias Ministerio de Educación y Cultura (España) Radon Anomalies Underground Cavities Subsoil Monitoring Gas Diffusion Vapour Condensation Fluctuations of trace gas activity as a response to variations in weather and microclimate conditions were monitored over a year in a shallow volcanic cave (Painted Cave, Galdar, Canary Islands, Spain). 222Rn concentration was used due to its greater sensitivity to hygrothermal variations than CO2 concentration. Radon concentration in the cave increases as effective vapour condensation within the porous system of the rock surfaces inside the cave increases due to humidity levels of more than 70%. Condensed water content in pores was assessed and linked to a reduction in the direct passage of trace gases. Fluctuations in radon activity as a response to variations in weather and microclimate conditions were statistically identified by clustering entropy changes on the radon signal and parameterised to predict radon concentration anomalies. This raises important implications for other research fields, including the surveillance of shallow volcanic and seismic activity, preventive conservation of cultural heritage in indoor spaces, indoor air quality control and studies to improve understanding of the role of subterranean terrestrial ecosystems as reservoirs and/or temporary sources of trace gases. This study was financed by the Gran Canaria Island Council and within the framework of the Spanish MEC projects CGL2010-17108, CGL2011-25494 and CGL2011-25162. This study was possible thanks to the kind support and help received from the managers and staff at the Galdar Painted Cave Museum and Archaeological Park. 2019-03-26T08:52:53Z 2019-03-26T08:52:53Z 2013-04-19 2019-03-26T08:52:53Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.atmosenv.2013.04.030 issn: 1352-2310 Atmospheric Environment 75: 15-23 (2013) http://hdl.handle.net/10261/178512 10.1016/j.atmosenv.2013.04.030 en https://doi.org/10.1016/j.atmosenv.2013.04.030 Sí open Elsevier |
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Radon Anomalies Underground Cavities Subsoil Monitoring Gas Diffusion Vapour Condensation Radon Anomalies Underground Cavities Subsoil Monitoring Gas Diffusion Vapour Condensation |
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Radon Anomalies Underground Cavities Subsoil Monitoring Gas Diffusion Vapour Condensation Radon Anomalies Underground Cavities Subsoil Monitoring Gas Diffusion Vapour Condensation Fernández-Cortés, Ángel Benavente, D. Cuezva, Soledad Cañaveras, Juan Carlos Álvarez-Gallego, Miriam García-Antón, E. Soler, Vicente Sánchez Moral, Sergio Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain |
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Fluctuations of trace gas activity as a response to variations in weather and microclimate conditions were monitored over a year in a shallow volcanic cave (Painted Cave, Galdar, Canary Islands, Spain). 222Rn concentration was used due to its greater sensitivity to hygrothermal variations than CO2 concentration. Radon concentration in the cave increases as effective vapour condensation within the porous system of the rock surfaces inside the cave increases due to humidity levels of more than 70%. Condensed water content in pores was assessed and linked to a reduction in the direct passage of trace gases. Fluctuations in radon activity as a response to variations in weather and microclimate conditions were statistically identified by clustering entropy changes on the radon signal and parameterised to predict radon concentration anomalies. This raises important implications for other research fields, including the surveillance of shallow volcanic and seismic activity, preventive conservation of cultural heritage in indoor spaces, indoor air quality control and studies to improve understanding of the role of subterranean terrestrial ecosystems as reservoirs and/or temporary sources of trace gases. |
author2 |
Gobierno de Canarias |
author_facet |
Gobierno de Canarias Fernández-Cortés, Ángel Benavente, D. Cuezva, Soledad Cañaveras, Juan Carlos Álvarez-Gallego, Miriam García-Antón, E. Soler, Vicente Sánchez Moral, Sergio |
format |
artículo |
topic_facet |
Radon Anomalies Underground Cavities Subsoil Monitoring Gas Diffusion Vapour Condensation |
author |
Fernández-Cortés, Ángel Benavente, D. Cuezva, Soledad Cañaveras, Juan Carlos Álvarez-Gallego, Miriam García-Antón, E. Soler, Vicente Sánchez Moral, Sergio |
author_sort |
Fernández-Cortés, Ángel |
title |
Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain |
title_short |
Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain |
title_full |
Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain |
title_fullStr |
Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain |
title_full_unstemmed |
Effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in Galdar cave, Spain |
title_sort |
effect of water vapour condensation on the radon content in subsurface air in a hypogeal inactive-volcanic environment in galdar cave, spain |
publisher |
Elsevier |
publishDate |
2013-04-19 |
url |
http://hdl.handle.net/10261/178512 |
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