AEROSOL OPTICAL DEPTH (AOD) OVER FOUR INDONESIAN CITIES FROM THE AERONET MEASUREMENT: AN OVERVIEW

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Sheila Dewi Ayu Kusumaningtyas

Abstract

A large amount of aerosol, commonly known as Particulate Matter (PM), is emitted to the atmosphere from land-use conversion, urbanization, and the use of fossil fuels from a variety of sectors. Aerosol affect climate, environment, to human health. Each location might have different aerosols types due to various sources, sinks, and local characteristics. Aerosol Robotic Network (AERONET) has been established to investigate and monitor aerosol world-wide included in Indonesia. This work aims to study aerosol optical properties retrieved from AERONET in four locations namely Bandung, Jambi, Pontianak, and Palangkaraya. Seasonal and daily variability in AOD and Angstrom exponent (α), also aerosol classification, is analyzed. The result shows that aerosol characteristics such as AOD and α in Bandung are different from Jambi, Palangkaraya, and Pontianak due to different aerosol sources. AOD clearly increases during the burning period (dry period) in Jambi, Palangkaraya, and Pontianak. The highest AOD monthly maximum recorded in Palangkaraya as of 4.51 during September. On the other hand, AOD in Bandung does not show significant variation during dry and rainy season. Mixed aerosols (coarse and fine mode) are present in all locations. However, the dominance of fine mode is depicted from high percent frequency of occurrence in Jambi, Palangkaraya, Pontianak, and Bandung, which are 33.4%, 31.38%, 25.14% (α range bin 1.6-1.8) and 37.16% (α range bin 1.4-1.6) respectively. There was a period of α>1 with 1<AOD<6 in Jambi, Palangkaraya, and Pontianak suggesting smoke fire from peatland, while AOD close to 1 with α>1 as the character of urban aerosol is prominent in Bandung.Â

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How to Cite
Sheila Dewi Ayu Kusumaningtyas. (2025). AEROSOL OPTICAL DEPTH (AOD) OVER FOUR INDONESIAN CITIES FROM THE AERONET MEASUREMENT: AN OVERVIEW. Jurnal Sains & Teknologi Modifikasi Cuaca, 20(2), 47–57. Retrieved from https://ejournal.brin.go.id/JSTMC/article/view/1223
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