A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand

The radiative effect of clouds on the incident surface solar radiation highly depends on the spectral band of the solar spectrum that is considered. In particular, cloud effects are known to be different for the broadband erythemal ultraviolet (hereafter, UVE) irradiance and the total global solar i...

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Autores: Badosa i Franch, Jordi, Calbó Angrill, Josep, McKenzie, Richard L., Long, Charles N., Liley, B., González Gutiérrez, Josep Abel
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2013
País:España
Recursos:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositório:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10256/16534
Acesso em linha:http://hdl.handle.net/10256/16534
Access Level:Acceso aberto
Palavra-chave:Radiació solar
Solar radiation
Radiació ultraviolada
Ultraviolet radiation
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spelling A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New ZealandBadosa i Franch, JordiCalbó Angrill, JosepMcKenzie, Richard L.Long, Charles N.Liley, B.González Gutiérrez, Josep AbelRadiació solarSolar radiationRadiació ultravioladaUltraviolet radiationThe radiative effect of clouds on the incident surface solar radiation highly depends on the spectral band of the solar spectrum that is considered. In particular, cloud effects are known to be different for the broadband erythemal ultraviolet (hereafter, UVE) irradiance and the total global solar irradiance (TR) due to the much more important molecular (Rayleigh) scattering on the UV than on the visible and near infrared wavelengths. In this work we investigate these differences by analyzing 9 years (2000-2008) of 1-minute UVE and TR measured at Lauder (45.04S, 169.68E, 370m asl), New Zealand. Clear sky models for UVE and TR are considered and their performances are tested. Effective cloud transmittance, also known as cloud modification factor (CMF) is calculated as the ratio between the 1-minute measurements and the clear sky estimation from modeling, both for UVE (CMF(UV)) and TR (CMF(TR)). The two CMF are then compared. The analyses are undertaken as a function of solar zenith angle (SZA), and Sun visibility derived from a Total Sky Imager (TSI) device. Differences between CMF(UV) and CMF(TR) are maximum for intermediate values of the latter, being CMF(UV) always greater than CMF(TR) (that is, UVE less affected by clouds). A methodology to calculate CMF(UV) as a function of CMF(TR) and SZA is proposed, and subsequently validated using 2 years of independent data (2009-2010). The agreement between estimated and measured UVE is remarkably good: absolute differences are less than 0.5 UVI units (being the greatest at lower SZA), and relative differences are less than 10% (the greatest at higher SZA), despite of a systematic error that needs to be correctedThis work was undertaken with the financial support of the Ministry of Economy and Competitiveness of Spain through the NUCLIESOL project (CGL-2010-18546/CLI) and the International Complementary Action PCI2006-A7-0604American Institute of Physics (AIP)Ministerio de Ciencia e Innovación (Espanya)2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionpeer-reviewedapplication/pdfhttp://hdl.handle.net/10256/16534http://hdl.handle.net/10256/16534© AIP Conference Proceedings, 2013, vol. 1531, p. 840-843Articles publicats (D-F)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)Inglésinfo:eu-repo/semantics/altIdentifier/doi/10.1063/1.4804901info:eu-repo/semantics/altIdentifier/issn/0094-243Xinfo:eu-repo/grantAgreement/MICINN//CGL2010-18546Tots els drets reservatsinfo:eu-repo/semantics/openAccessoai:recercat.cat:10256/165342026-05-29T05:05:01Z
dc.title.none.fl_str_mv A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
title A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
spellingShingle A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
Badosa i Franch, Jordi
Radiació solar
Solar radiation
Radiació ultraviolada
Ultraviolet radiation
title_short A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
title_full A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
title_fullStr A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
title_full_unstemmed A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
title_sort A method to estimate erythemal UV from total solar irradiance measurements based on 9 years of 1-minute data at Lauder, New Zealand
dc.creator.none.fl_str_mv Badosa i Franch, Jordi
Calbó Angrill, Josep
McKenzie, Richard L.
Long, Charles N.
Liley, B.
González Gutiérrez, Josep Abel
author Badosa i Franch, Jordi
author_facet Badosa i Franch, Jordi
Calbó Angrill, Josep
McKenzie, Richard L.
Long, Charles N.
Liley, B.
González Gutiérrez, Josep Abel
author_role author
author2 Calbó Angrill, Josep
McKenzie, Richard L.
Long, Charles N.
Liley, B.
González Gutiérrez, Josep Abel
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (Espanya)
dc.subject.none.fl_str_mv Radiació solar
Solar radiation
Radiació ultraviolada
Ultraviolet radiation
topic Radiació solar
Solar radiation
Radiació ultraviolada
Ultraviolet radiation
description The radiative effect of clouds on the incident surface solar radiation highly depends on the spectral band of the solar spectrum that is considered. In particular, cloud effects are known to be different for the broadband erythemal ultraviolet (hereafter, UVE) irradiance and the total global solar irradiance (TR) due to the much more important molecular (Rayleigh) scattering on the UV than on the visible and near infrared wavelengths. In this work we investigate these differences by analyzing 9 years (2000-2008) of 1-minute UVE and TR measured at Lauder (45.04S, 169.68E, 370m asl), New Zealand. Clear sky models for UVE and TR are considered and their performances are tested. Effective cloud transmittance, also known as cloud modification factor (CMF) is calculated as the ratio between the 1-minute measurements and the clear sky estimation from modeling, both for UVE (CMF(UV)) and TR (CMF(TR)). The two CMF are then compared. The analyses are undertaken as a function of solar zenith angle (SZA), and Sun visibility derived from a Total Sky Imager (TSI) device. Differences between CMF(UV) and CMF(TR) are maximum for intermediate values of the latter, being CMF(UV) always greater than CMF(TR) (that is, UVE less affected by clouds). A methodology to calculate CMF(UV) as a function of CMF(TR) and SZA is proposed, and subsequently validated using 2 years of independent data (2009-2010). The agreement between estimated and measured UVE is remarkably good: absolute differences are less than 0.5 UVI units (being the greatest at lower SZA), and relative differences are less than 10% (the greatest at higher SZA), despite of a systematic error that needs to be corrected
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
peer-reviewed
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10256/16534
http://hdl.handle.net/10256/16534
url http://hdl.handle.net/10256/16534
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1063/1.4804901
info:eu-repo/semantics/altIdentifier/issn/0094-243X
info:eu-repo/grantAgreement/MICINN//CGL2010-18546
dc.rights.none.fl_str_mv Tots els drets reservats
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Tots els drets reservats
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics (AIP)
publisher.none.fl_str_mv American Institute of Physics (AIP)
dc.source.none.fl_str_mv © AIP Conference Proceedings, 2013, vol. 1531, p. 840-843
Articles publicats (D-F)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869413069599277056
score 15.811543

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