Aerosol effects on the UV irradiance in Santiago de Chile

Cordero, R.R., G. Seckmeyer, A. Damiani, J. Jorquera, J. Carrasco, R. Muñoz, L. Da Silva, F. Labbe, D. Laroze

Abstract

Santiago de Chile (33 degrees 27' S-70 degrees 41' W) is a mid-latitude city of 6 million inhabitants with a complicated surrounding topography. Aerosol extinction in Santiago is determined by the semi-arid local climate, the urban pollution, a regional subsidence thermal inversion layer, and the boundary-layer wind airflow. In this paper we report on spectral measurements of the surface irradiance (at 290-600 nm wavelength range) carried out during 2013 in the heart of the city by using a double monochromator-based spectroradiometer system. These measurements were used to assess the effect of local aerosols, paying particular attention to the ultraviolet (UV) range. We found that the aerosol optical depth (AOD) exhibited variations likely related to changes in the subsidence thermal inversion and in the boundary-layer winds. Although the AOD at 350 nm typically ranged from 0.2 to 0.3, peak values of about 0.7 were measured. The AOD diminished with the wavelength and typically ranged from 0.1 to 0.2 at 550 nm. Our AOD data were found to be consistent with measurements of the particulate matter (PM) mass concentration. (C) 2014 Elsevier B.V. All rights reserved.

Más información

Título según WOS: Aerosol effects on the UV irradiance in Santiago de Chile
Título según SCOPUS: Aerosol effects on the UV irradiance in Santiago de Chile
Título de la Revista: ATMOSPHERIC RESEARCH
Volumen: 149
Editorial: Elsevier Science Inc.
Fecha de publicación: 2014
Página de inicio: 282
Página final: 291
Idioma: English
URL: http://linkinghub.elsevier.com/retrieve/pii/S0169809514002646
DOI:

10.1016/j.atmosres.2014.07.002

Notas: ISI, SCOPUS