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Aerosol optical depth retrievals at the Izaña Atmospheric Observatory from 1941 to 2013 by using artificial neural networks [Discussion paper]
Título : Aerosol optical depth retrievals at the Izaña Atmospheric Observatory from 1941 to 2013 by using artificial neural networks [Discussion paper]
Autor : García Cabrera, Rosa Delia ORCID RESEARCHERID García Rodríguez, Omaira Elena ORCID RESEARCHERID Cuevas Agulló, Emilio ORCID RESEARCHERID SCOPUSID Cachorro, Victoria E.Barreto, África RESEARCHERID Guirado-Fuentes, Carmen ORCID RESEARCHERID Kouremeti, NataliaBustos, Juan José deRomero Campos, Pedro Miguel ORCID RESEARCHERID Frutos, Ángel M. de
Palabras clave : Profundidad óptica de aerosoles; Redes neuronales artificiales; Aerosol optical depth; Artificial neural networks
Fecha de publicación : 2015
Editor: European Geosciences Union
Citación : Atmospheric Measurement Techniques Discussions. 2015, 8, p. 9075–9103
Versión del editor: http://dx.doi.org/10.5194/amtd-8-9075-2015
Resumen : This paper presents the reconstruction of a 73-year time series of the aerosol optical depth (AOD) at 500 nm at the subtropical high-mountain Izaña Atmospheric Observatory (IZO) located in Tenerife (Canary Islands, Spain). For this purpose, we have combined AOD estimates from artificial neural networks (ANNs) from 1941 to 2001 and AOD measurements directly obtained with a Precision Filter Radiometer (PFR) between 2003 and 2013. The analysis is limited to summer months (July–August–September), when the largest aerosol load is observed at IZO (Saharan mineral dust particles). The ANN AOD time series has been comprehensively validated against coincident AOD measurements performed with a solar spectrometer Mark-I (1984–2009) and AERONET (AErosol RObotic NETwork) CIMEL photometers (2004–2009) at IZO, obtaining a rather good agreement on a daily basis: Pearson coefficient, R, of 0.97 between AERONET and ANN AOD, and 0.93 between Mark-I and ANN AOD estimates. In addition, we have analysed the long-term consistency between ANN AOD time series and long-term meteorological records identifying Saharan mineral dust events at IZO (synoptical observations and local wind records). Both analyses provide consistent results, with correlations  >  85 %. Therefore, we can conclude that the reconstructed AOD time series captures well the AOD variations and dust-laden Saharan air mass outbreaks on short-term and long-term timescales and, thus, it is suitable to be used in climate analysis.
Patrocinador: The AERONET Cimel sun photometer at Izaña has been calibrated by AERONET-EUROPE Calibration Service, financed by the Aerosol Cloud and TRace gas InfraStructure (ACTRIS) European Research Infrastructure Action (FP7/2007-2013 no. 262254). Financial support from the Spanish Ministry of Economy and Competitiveness (MINECO) and from the “Fondo Europeo de Desarrollo Regional” (FEDER) for project CGL2012-33576 is gratefully acknowledged.
URI : http://hdl.handle.net/20.500.11765/6658
ISSN : 1867-8610
Colecciones: Artículos científicos 2015-2018

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