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Proceedings Paper

Preliminary study of the influence of the urban effect on the spectral aerosol optical thickness in a Mediterranean coastal site
Author(s): Pilar Utrillas; Jose A. Martinez-Lozano; Fernando Tena; Roberto Pedros; Javier Canada; Jose V. Bosca; Jeronimo Lorente
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Paper Abstract

We present a preliminary study of the urban effects on the aerosol optical thickness. Since Valencia is close to the sea, the measurement campaigns were carefully planned in order to separate urban effects and the sea's influence. Measurements of spectral direct irradiance were taken simultaneously at rural continental, rural coastal and urban coastal sites. The distance between these locations was 50 km. The measurements were obtained using three Li-cor 1800 spectroradiometers provided with a radiance limiting tube with afield of view of 4.7 degrees. All the measurements were made under clear sky conditions. In order to avoid the uncertainties associated with the determination of the water vapor content and the other atmospheric constituents, the analysis of the optical thickness values was limited to the 400-670 nm band. The result corresponding to the aerosol optical thickness at wavelengths of 400 and 550 nm are presented. An analysis of their evolution with the optical air mass and of their relation with the characteristics of the wind and the relative humidity at ground level is also made.

Paper Details

Date Published: 14 December 1998
PDF: 9 pages
Proc. SPIE 3495, Satellite Remote Sensing of Clouds and the Atmosphere III, (14 December 1998); doi: 10.1117/12.332694
Show Author Affiliations
Pilar Utrillas, Univ. de Valencia (Spain)
Jose A. Martinez-Lozano, Univ. de Valencia (Spain)
Fernando Tena, Univ. de Valencia (Spain)
Roberto Pedros, Univ. de Valencia (Spain)
Javier Canada, Univ. Politecnica de Valencia (Spain)
Jose V. Bosca, Univ. Politecnica de Valencia (Spain)
Jeronimo Lorente, Univ. de Barcelona (Spain)

Published in SPIE Proceedings Vol. 3495:
Satellite Remote Sensing of Clouds and the Atmosphere III
Jaqueline E. Russell, Editor(s)

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