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Change of radioactive cesium (137Cs and 134Cs) content in cloud water at an elevated site in France, before and after the Fukushima nuclear accident: Comparison with radioactivity in rainwater and in aerosol particles

hal.structure.identifierInstitut de Radioprotection et de Sûreté Nucléaire [IRSN]
dc.contributor.authorMASSON, Olivier
hal.structure.identifierInstitut de Radioprotection et de Sûreté Nucléaire [IRSN]
dc.contributor.authorDE VISMES OTT, Anne
hal.structure.identifierCNR Institute of Atmospheric Sciences and Climate [ISAC]
dc.contributor.authorBOURCIER, Lauréline
hal.structure.identifierInstitut de Radioprotection et de Sûreté Nucléaire [IRSN]
dc.contributor.authorPAULAT, Pascal
hal.structure.identifierLaboratoire de météorologie physique [LaMP]
dc.contributor.authorRIBEIRO, Mickaël
hal.structure.identifierLaboratoire de météorologie physique [LaMP]
dc.contributor.authorPICHON, Jean-Marc
hal.structure.identifierLaboratoire de météorologie physique [LaMP]
dc.contributor.authorSELLEGRI, Karine
hal.structure.identifierInstitut de Radioprotection et de Sûreté Nucléaire [IRSN]
hal.structure.identifierCentre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]
dc.contributor.authorGURRIARAN, R.
dc.date.issued2015-01
dc.identifier.issn0169-8095
dc.description.abstractEnAirborne cesium isotopes (134Cs and 137Cs) released during the Fukushima nuclear accident were transported all around the world attached to particles and reached France about 12 days after the first explosion. Concentration of cesium isotopes in cloud water sampled at the summit of the Puy de Dôme mountain (1465 m a.s.l.) increased by a factor of at least 40. During the following weeks, the concentrations decreased more slowly in cloud water than in rain and in rain compared with what was found on the aerosol phase. Cesium-134 was detectable in the aerosol phase, in rain and in cloud water for 3 months, 11 months and 18 months after the accident, respectively. These kinetics are consistent with the washout scavenging of aerosol in the lower layers of the atmosphere that leads to a relative depletion of Fukushima-labeled aerosols at ground level. Airborne particles at high altitudes, i.e. where clouds form, have a longer residence time. This finding has implications on the different time scales at which a contamination may be transferred to the ground, depending if it is transferred via dry or wet deposition. This study highlights that cloud water is a relevant type of environmental sample to attest the presence of radionuclides on a longer time scale than for the aerosol phase, provided that the metrology is able to lower usual detection limits. Rainout efficiency was computed for 137Cs.
dc.language.isoen
dc.publisherElsevier
dc.subject.enAerosol
dc.subject.enCloud
dc.subject.enDroplet
dc.subject.en137Cs
dc.subject.enFukushima
dc.subject.enFrance
dc.title.enChange of radioactive cesium (137Cs and 134Cs) content in cloud water at an elevated site in France, before and after the Fukushima nuclear accident: Comparison with radioactivity in rainwater and in aerosol particles
dc.typeArticle de revue
dc.identifier.doi10.1016/j.atmosres.2014.03.031
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphère
bordeaux.journalAtmospheric Research
bordeaux.page45-51
bordeaux.volume151
bordeaux.peerReviewedoui
hal.identifierhal-01119983
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01119983v1
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