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Proceedings Paper

Field study on O3, SO2 and NH3 deposition over a suburban area: Madrid case study
Author(s): Roberto San Jose; F. Javier Moreno; M. Angeles San Feliu
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Paper Abstract

Deposition processes are a very important part of the atmospheric dispersion models. The removal from the atmosphere of the different chemical compounds which are deposited over different surfaces which are found in a complex environment such as urban centers and surroundings. Mesoscale transport models use the deposition modules to remove pollutants from the atmosphere and the quality of the deposition parameterization processes is out of the question. The classical approach of deposition processes into the dispersion models has been based on the so-called 'big-leaf' approach which is based on a former version of the resistance approach introduced in the 1970's. This is based on the accurate parameterization of the resistances, particlarly on the canopy resistance. The characterization of the different land-use types and the quantification of the different parameters for the different chemical compounds is based on field experiments carried out with ighly sophisticated instrumentation usually based on the eddy-correlation technique. In this contribution, we present first preliminary results on a field deposition experiment based on the data obtained from the eddy-correlation and modified Bowen-ratio technique for ozone (eddy-correlation) and SO2 and ammonia (Bowen ratio). The location of the field experiment is a military airport (Cuatro Vientos) located 10 km to the west of the Madrid urban area. Deposition velocities are modeled following different approaches based on the 'big-leaf' concept. Ammonia emission/deposition processes are parameterized focusing on the 'canopy compensation point'.

Paper Details

Date Published: 20 September 1995
PDF: 12 pages
Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221030
Show Author Affiliations
Roberto San Jose, Univ. Politecnica de Madrid (Spain)
F. Javier Moreno, Univ. Politecnica de Madrid (Spain)
M. Angeles San Feliu, Univ. Politecnica de Madrid (Spain)

Published in SPIE Proceedings Vol. 2506:
Air Pollution and Visibility Measurements
Peter Fabian; Volker Klein; Maurus Tacke; Konradin Weber; Christian Werner, Editor(s)

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