Measurements of PM2.5 in megacity

M. Nakata; I. Sano; S. Mukai

doi:10.1117/12.2028477

17 October 2013 Measurements of PM_2.5 in megacity

M. Nakata, I. Sano, S. Mukai

Proceedings Volume 8890, Remote Sensing of Clouds and the Atmosphere XVIII; and Optics in Atmospheric Propagation and Adaptive Systems XVI; 88900X (2013) https://doi.org/10.1117/12.2028477
Event: SPIE Remote Sensing, 2013, Dresden, Germany

Abstract

Air pollution in megacities has become a serious problem. Fine particles called PM_2.5, with a diameter of 2.5 micrometres or less, are particularly problematic. Our observation site, located in eastern Osaka, is home to many smalland medium-scale manufacturing enterprises. A clear atmosphere is rare in this area, and the air is usually polluted with suspended particles emitted from diesel vehicles and industries. Furthermore, pollutants carried by winds from China add to the levels of pollution in the atmosphere. In this work, we investigate the size and composition of particulate matter with a scanning electron microscope (SEM) coupled with an energy-dispersive X-ray analyser (EDX). We use sampling data from an PM sampler mounted on the roof of a building at Kinki University at a height of about 50 m above sea level. It is evident that aerosol properties such as the amount, size, shape, and composition, change when anthropogenic or dust aerosol is transported. The level of sulphate and the percentage of fine particle increase in severe air pollution. In contrast, it is clear that silicon, which is possibly derived from soil particles, becomes dominant and that the number of large particles increase during the dust event.

Citation Download Citation

M. Nakata, I. Sano, and S. Mukai "Measurements of PM_2.5 in megacity", Proc. SPIE 8890, Remote Sensing of Clouds and the Atmosphere XVIII; and Optics in Atmospheric Propagation and Adaptive Systems XVI, 88900X (17 October 2013); https://doi.org/10.1117/12.2028477

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