Abstract

In July–August 2020, the volcano on Nishinoshima Island erupted with a moderate scale. The emitted aerosols arrived in Taiwan in early August and caused hazy air conditions in a few cities. In the city of Kaohsiung (KS) in southern Taiwan, the volcanic aerosols were observed with a combination of the aerosol robotic network (AERONET), several ground monitoring stations, and a lidar system. Increasing aerosol loadings were observed, beginning on 5 August 2020, based on a ground PM10/PM2.5 and the aerosol optical depth (AOD) of AERONET. Lidar measurements showed strong aerosol layers at heights of 0–2 km comparable to AERONET AOD. Optical properties including AOD, Angström exponent (AE), lidar backscattering coefficient, and depolarization ratio are measured with the source investigated using the back and forward trajectory studies.

© 2021 Optical Society of America

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