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Proceedings Paper

Aerosol optical depth derived from lidar measurements during VELETA-2002 campaign
Author(s): Francisco Molero; Manuel Pujadas; Jose Manuel Fernandez; Maria Pilar Utrillas; Jose Antonio Martinez-Lozano; Roberto Pedros; Lucas Alados-Arboledas; Jeronimo Lorente; Victoria Cachorro; Ana Maria Diaz Rodriguez; Antonio Labajo; Benito De la Morena; Jose Antonio Rodrigues; Ana Maria Silva; Helmuth Horvath
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Paper Abstract

We present measurements of the vertical structure of the aerosol extinction coefficient in the lower troposphere, up to five kilometers. Lidar profiles were collected at Armilla (680 m asl) and Pitres (1252 m asl) during the VELETA-2002 campaign, organized to analyze the effect of altitude and aerosols on ground-level UV spectral irradiance. Single-wavelength lidar signals are inverted to derive vertically resolved aerosol extinction coefficient and integrated to provide aerosol optical depth (AOD) at 532 nm. These results are compared with measurements of the aerosol optical depth at the same wavelength provided by Licor LI-1800 spectroradiometers located at several altitudes. Lidar traces show that most of the aerosol loading is present in the first 2.5 km layer before a high-dust Saharan air mass overflew the site. On the 17th of July evening, an elevated aerosol layer was detected between 2.5 and 3.5 km and during the following three days the aerosol vertical profile of the lower atmosphere showed Sahara dust layers, producing relatively high values for the optical depth.

Paper Details

Date Published: 16 February 2004
PDF: 9 pages
Proc. SPIE 5235, Remote Sensing of Clouds and the Atmosphere VIII, (16 February 2004); doi: 10.1117/12.511073
Show Author Affiliations
Francisco Molero, Ctr. de Investigaciones Energeticas, Medioambientales y Technologicas (Spain)
Manuel Pujadas, Ctr. de Investigaciones Energeticas, Medioambientales y Technologicas (Spain)
Jose Manuel Fernandez, Ctr. de Investigaciones Energeticas, Medioambientales y Technologicas (Spain)
Maria Pilar Utrillas, Univ. de Valencia (Spain)
Jose Antonio Martinez-Lozano, Univ. de Valencia (Spain)
Roberto Pedros, Univ. de Valencia (Spain)
Lucas Alados-Arboledas, Univ. de Granada (Spain)
Jeronimo Lorente, Univ. de Barcelona (Spain)
Victoria Cachorro, Univ. de Valladolid (Spain)
Ana Maria Diaz Rodriguez, Univ. de la Laguna (Spain)
Antonio Labajo, Instituto Nacional de Meteorologia (Spain)
Benito De la Morena, Instituto Nacional de Tecnica Aerospacial (Spain)
Jose Antonio Rodrigues, Instituto Superior Tecnico (Portugal)
Ana Maria Silva, Univ. de Evora (Portugal)
Helmuth Horvath, Univ. Wien (Austria)

Published in SPIE Proceedings Vol. 5235:
Remote Sensing of Clouds and the Atmosphere VIII
Klaus P. Schaefer; Adolfo Comeron; Michel R. Carleer; Richard H. Picard, Editor(s)

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