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Effect of diurnal and seasonal temperature variation on Cussac cave ventilation using co2 assessment

hal.structure.identifierUniversité de Bordeaux [UB]
hal.structure.identifierService National d'Observation sur le KARST [SNO Karst]
dc.contributor.authorPEYRAUBE, Nicolas
IDREF: 157074005
hal.structure.identifierUniversité de Bordeaux [UB]
dc.contributor.authorLASTENNET, Roland
IDREF: 079112056
dc.contributor.authorVILLANUEVA, Jessica Denila
dc.contributor.authorHOUILLON, Nicolas
IDREF: 198194978
hal.structure.identifierGéosciences hydrosciences matériaux constructions [Ghymac]
dc.contributor.authorMALAURENT, Philippe
dc.contributor.authorDENIS, Alain
IDREF: 095129243
dc.date.accessioned2021-05-14T09:30:39Z
dc.date.available2021-05-14T09:30:39Z
dc.date.issued2017-08
dc.identifier.issn0177-798X
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/75829
dc.description.abstractEnCussac cave was investigated to assess the cave air temperature variations and to understand its ventilation regime. This cave is located in an active karst system in the south west part of France. It has a single entrance and is considered as a cold air trap. In this study, air mass exchanges were probed. Measurements of temperature and Pco2 with a 30-min frequency were made in several locations close to the cave entrance. Speed of the air flow was also measured at the door of cave entrance. Results show that cave air Pco2 varies from 0.18 to 3.33 %. This cave appears to be a CO2 source with a net mass of 2319 tons blown in 2009. Carbon-stable isotope of CO2 (13Cco2) ranges from −20.6 ‰ in cold season to −23.8 ‰ in warm season. Cave air is interpreted as a result of a mix between external air and an isotopically depleted air, coming from the rock environment. The isotopic value of the light member varies through time, from −23.9 to −22.5 ‰. Furthermore, this study ascertains that the cave never stops in communicating with the external air. The ventilation regime is identified. (1) In cold season, the cave inhales at night and blows a little at the warmest hours. However, in warm season, (2) cave blows at night, but (3) during the day, a convection loop takes place in the entrance area and prevents the external air from entering the cave, confirming the cold air trap.
dc.language.isoen
dc.publisherSpringer Verlag
dc.title.enEffect of diurnal and seasonal temperature variation on Cussac cave ventilation using co2 assessment
dc.typeArticle de revue
dc.identifier.doi10.1007/s00704-016-1824-8
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnement
dc.subject.halSciences de l'environnement/Milieux et Changements globaux
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Hydrologie
bordeaux.journalTheoretical and Applied Climatology
bordeaux.page1045-1058
bordeaux.volume129
bordeaux.hal.laboratoriesInstitut de Mécanique et d’Ingénierie de Bordeaux (I2M) - UMR 5295*
bordeaux.issue3-4
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionBordeaux INP
bordeaux.institutionCNRS
bordeaux.institutionINRAE
bordeaux.institutionArts et Métiers
bordeaux.peerReviewedoui
hal.identifierhal-03166740
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03166740v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Theoretical%20and%20Applied%20Climatology&rft.date=2017-08&rft.volume=129&rft.issue=3-4&rft.spage=1045-1058&rft.epage=1045-1058&rft.eissn=0177-798X&rft.issn=0177-798X&rft.au=PEYRAUBE,%20Nicolas&LASTENNET,%20Roland&VILLANUEVA,%20Jessica%20Denila&HOUILLON,%20Nicolas&MALAURENT,%20Philippe&rft.genre=article


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