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Title: Surface UV Radiation in the South of Portugal: Monitoring and Assessment of Cloud Effects
Authors: Costa, Maria João
Bortoli, Daniele
Pereira, Sérgio
Salgueiro, Vanda
Silva, Ana Maria
Serrano, Antonio
Antón, Manuel
Vilaplana, Jose Manuel
Cancillo, Maria Luisa
Santos, Dina
Kulkarni, Pavan
Keywords: UV radiation
Radiative forcing
Issue Date: May-2013
Publisher: American Institute of Physics
Citation: Costa, M. J., D. Bortoli, S. Pereira, V. Salgueiro, A. M. Silva, A. Serrano, M. Antón, J. M. Vilaplana, M. L. Cancillo, D. Santos, and P. Kulkarni. Surface UV radiation in the South of Portugal: Monitoring and assessment of cloud effects. AIP Conf. Proc. 1531, 852 (2013).
Abstract: M easurements of both UV B (280 – 315 nm) and UV AB (280 – 400 nm) irradiances taken during about seven years are presented and analyzed here . The UV irradiance data were measured with MACA M radiometers, which are installed in the Atmospheric Physics Observatory of the University of Évora Geophysics Center - CGE (38°34’N, 7°54’W, 300 m above mean sea level) since 200 4 . Special attention is devoted to calibration issues, since the radiometers were calibrated in Spain, at “El Arenosillo” ESAt/INTA laboratory in 2009 and a methodology based on radiative transfer calculations combined with observations from atmospheric quantities, was developed and applied to retro - calib rate the data from 2009 to 2004 . The comparison between the radiative transfer based and the laboratory calibration methodologies yielded a quite promising outcome, with normalized root mean square errors lower than 3 % and mean absolute percentage error s lower than 2 %. Cloud opti cal thickness values derived from ground - based spectral irradiance measurements taken at the CGE observatory, are also used in order to investigate the influence of this cloud quantity o n UV irradiance s .
Type: article
Appears in Collections:FIS - Artigos em Livros de Actas/Proceedings
CGE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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