Spectral-temporal variations of aerosol Ångström exponent over Manila, Philippines

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

Advanced Science Letters

Volume

23

Issue

3

First Page

1456

Last Page

1460

Publication Date

3-1-2017

Abstract

The aerosol optical thickness (AOT), Ångström parameters (α and β), and the first derivative of the wavelength exponent (α′) retrieved from MICROTOPS II have been analyzed aiming to investigate aerosol optical properties in Manila, Philippines. Spectral variations of AOT against wavelengths showed good agreement following the Ångström power law. The Ångström parameters were retrieved using least squares method, while a second-order polynomial fit was done to provide a curvature for the AOT spectra. The coefficients (a2 and a1) of the second-order polynomial fit were more accurate for the discrimination of the aerosol size distribution (ASD). A negative curvature reveals the dominance of fine-mode aerosols derived from both curvatures and the Ångström power law. © 2017 American Scientific Publishers. All rights reserved.

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Digitial Object Identifier (DOI)

10.1166/asl.2017.8351

Disciplines

Physics

Keywords

Aerosols

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