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dc.contributor.authorJ. Turnbull, David
dc.contributor.authorV. Parisi, Alfio
dc.contributor.authorW. Schouten, Peter
dc.date.accessioned2017-05-03T15:40:51Z
dc.date.available2017-05-03T15:40:51Z
dc.date.issued2010
dc.date.modified2011-10-20T06:39:49Z
dc.identifier.issn00337587
dc.identifier.urihttp://hdl.handle.net/10072/40558
dc.description.abstractThis paper evaluates the global vitamin D effective UV (UVvitd) irradiances under cloudy conditions at a subtropical, southern hemisphere site. The UVvitd irradiances were analyzed on a horizontal plane and sampled at 5-min intervals over 18 months so that a wide range of parameters including cloud conditions, solar zenith angles (SZA) and ozone levels were taken into account. Cloud modification factors were determined from the influence of clouds on the global broadband solar radiation, and these were applied to the cloud-free vitamin D effective UV irradiance to evaluate the UVvitd irradiances on a horizontal plane for cloudy conditions. For vitamin D effective UV irradiance, cloud modification factors were found to range from 0.9 to 1.0 for no cloud and 0.4 to 0.5 for 8 octa of cloud cover. SZA played a minimal role in this variation. A comparison of the measured and calculated UVvitd irradiances for the 2004 data set in the range of SZA of 70u or less provided an R2 value of 0.90. The output of the model was compared to data measured during the first 6 months of 2005 for an SZA of 70u or less and provided an R2 value of approximately 0.82.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_AU
dc.publisherRadiation Research Society
dc.publisher.placeUnited States
dc.publisher.urihttp://www.rrjournal.org/doi/abs/10.1667/RR1936.1
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom703
dc.relation.ispartofpageto708
dc.relation.ispartofissue5
dc.relation.ispartofjournalRadiation Research
dc.relation.ispartofvolume173
dc.rights.retentionY
dc.subject.fieldofresearchAtmospheric Radiation
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchMedical and Health Sciences
dc.subject.fieldofresearchcode040103
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode06
dc.subject.fieldofresearchcode11
dc.titleEmpirical evaluation of global vitamin D effective ultraviolet irradiances under cloudy conditions for a subtropical southern hemisphere site
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyrightSelf-archiving of the author-manuscript version is not yet supported by this journal. Please refer to the journal link for access to the definitive, published version or contact the author[s] for more information.
gro.date.issued2010
gro.hasfulltextNo Full Text
gro.griffith.authorSchouten, Peter W.


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