17 May 2006 Tropospheric aerosols remote sensing over the water surface of Penang Island
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Abstract
Tropospheric aerosols play an important role in climate change. Aerosols are typically studied over deep clear water, due to the relatively constant reflectance of water and the ability to easily separate surface and atmospheric contributions on the satellite signal. A methodology based on multi-spectral approach was employed to map tropospheric aerosols concentrations over the water areas surrounding Penang Island. The aim of this study was to estimate the pollutants concentrations using remote sensing techniques. In this study, we attempted to derive AOT (Aerosol Optical Thickness) values from the sky transmittance measurements in the visible spectrum. The transmittance values were measured at the sea surface using a handheld spectroradiometer. The correspond PM10 readings were taken simultaneously during the transmittance measurements acquisition of the imageries using a Dust Trak meter. The PCI Geomatica version 9.1 digital image processing software was used in all image-processing analyses. The results produced a linear relationship between PM10 and AOT values over the water surface of Penang Island. Finally, The PM10 concentration map over the water surface of Penang Island was generated using Kriging interpolation technique. This study has indicated the potential use of a handheld spectroradiometer for air quality study.
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S. A. Hashim, S. A. Hashim, M. Z. MatJafri, M. Z. MatJafri, K. Abdullah, K. Abdullah, H. S. Lim, H. S. Lim, C. J. Wong, C. J. Wong, N. Mohd. Salleh, N. Mohd. Salleh, } "Tropospheric aerosols remote sensing over the water surface of Penang Island", Proc. SPIE 6235, Signal Processing, Sensor Fusion, and Target Recognition XV, 62351N (17 May 2006); doi: 10.1117/12.665432; https://doi.org/10.1117/12.665432
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