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An integrating sphere spectral system to measure continuous spectra of aerosol absorption coefficient

dc.contributor.authorMontilla, E.
dc.contributor.authorMogo, Sandra
dc.contributor.authorCachorro, Victoria
dc.contributor.authorDe Frutos, Ángel M
dc.date.accessioned2018-08-27T15:34:26Z
dc.date.available2018-08-27T15:34:26Z
dc.date.issued2011
dc.description.abstractAn integrating sphere spectral system has been developed that allows the measurement of continuous spectra of light absorption coefficients, saðlÞ of atmospheric aerosols. This system is based on the filter attenuation method covering the spectral wavelength range 320–800 nm with a variable spectral resolution. The sample filters had to be diluted in chloroform previous to the light attenuation measurements and hence the system cannot measure continuously but only on the basis of daily sampling. The system was calibrated using known amounts of absorbing and non-absorbing industrial substances at relevant atmospheric absorption levels. The resulting values of sa ðlÞ were compared with those delivered by a commercial photometer (particle soot absorption photometer) in the laboratory and also with field measurements, with a maximum discrepancy of 12.5% for atmospherically relevant values. The measurement uncertainty of the integrating sphere system is about 10% maximum. The importance of obtaining continuous spectral data is the possibility to determine the Ångström absorption exponent, aa , in different spectral ranges, including the UV. This exponent can then be used to help in obtaining the aerosol composition information.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.jaerosci.2011.01.003pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/5751
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectAtmospheric aerosolspt_PT
dc.subjectAbsorption coefficientspt_PT
dc.subjectÅngström absorption exponentpt_PT
dc.subjectUVpt_PT
dc.titleAn integrating sphere spectral system to measure continuous spectra of aerosol absorption coefficientpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage212pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage204pt_PT
oaire.citation.titleJournal of Aerosol Sciencept_PT
oaire.citation.volume42pt_PT
person.familyNameMogo
person.familyNameCachorro
person.familyNamede Frutos
person.givenNameSandra
person.givenNameVictoria
person.givenNameÁngel M
person.identifier340036
person.identifier.ciencia-id1717-63EA-3853
person.identifier.orcid0000-0002-1423-2668
person.identifier.orcid0000-0002-4627-9444
person.identifier.orcid0000-0001-5748-5078
person.identifier.scopus-author-id6508333851
person.identifier.scopus-author-id7004005379
person.identifier.scopus-author-id6603892355
rcaap.embargofctCopyright cedido à editora no momento da publicação.pt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4c37dfc5-2e33-49f8-b105-5421875a536d
relation.isAuthorOfPublication01969a6d-9e30-47cc-b72a-4ee3be0ad540
relation.isAuthorOfPublication5f7234e6-1637-4781-8edb-1b8a193ae7c0
relation.isAuthorOfPublication.latestForDiscovery4c37dfc5-2e33-49f8-b105-5421875a536d

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