Urban aerosol depolarization ratio evolution from horizontal LIDAR measurements

Authors

Edgar A. Vallar ⋅ PH Physics Department, De La Salle University
Maria Cecilia D. Galvez ⋅ PH Physics Department, De La Salle University
Ernest P. Macalalad ⋅ PH Physics Department, De La Salle University
Juan Carlos Q. Uy ⋅ PH Physics Department, De La Salle University
Tanglaw A. Roman ⋅ PH Physics Department, De La Salle University
Eric B. Bangsal ⋅ PH Physics Department, De La Salle University

Abstract

Urban aerosol depolarization ratio (δ) measurements were made in Manila, Philippines using the 532 nm channel of the De La Salle University (DLSU) scanning Mie LIDAR system oriented horizontally. Measurements were taken days before, during and days after the traditional New Year's Eve fireworks. The evolution of δ and the effect of vehicular traffic along with the use of firecrackers was investigated. Results for the days before and after New Year's Eve show that the evolution of δ depends not only on the volume of vehicular traffic but also on the existing meteorological conditions. Although not available at this time, data was taken for hot and humid conditions up to cold and windy situations. Urban aerosols detected during New Year's Eve can be attributed to firecrackers used while vehicular traffic was the main aerosol source for other days.

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Issue

2004: Proceedings of the 22nd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2004-2B-02

Section

Atmospheric Studies

Published

2004-10-25

How to Cite

[1]

EA Vallar, MCD Galvez, EP Macalalad, JCQ Uy, TA Roman, and EB Bangsal, Urban aerosol depolarization ratio evolution from horizontal LIDAR measurements, Proceedings of the Samahang Pisika ng Pilipinas 22, SPP-2004-2B-02 (2004). URL: https://proceedings.spp-online.org/article/view/SPP-2004-2B-02.