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Open AccessArticle

Long-Term Variation of Black Carbon Absorption Aerosol Optical Depth from AERONET Data over East Asia

1
Division of Earth Environmental System Science, Pukyong National University, Busan 48513, Korea
2
Department of Environmental Engineering, Pukyong National University, Busan 48513, Korea
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(21), 3551; https://doi.org/10.3390/rs12213551
Received: 31 August 2020 / Revised: 4 October 2020 / Accepted: 28 October 2020 / Published: 30 October 2020
(This article belongs to the Special Issue Remote Sensing of Aerosols and Gases in Cities)
Absorption aerosol optical depth induced by black carbon (AAODBC) was retrieved using the depolarization ratio and single scattering albedo provided by the Aerosol Robotic Network (AERONET) inversion products over East Asia. Our analysis considered AERONET data from six sites in East Asia that are mostly affected by anthropogenic pollution, black carbon (BC) emissions, and natural mineral dust, during the period 2001–2018. We identified a rapid reduction in total aerosol optical depth (AODT) of −0.0106 yr−1 over Beijing, whereas no considerable trend was observed at the Korean and Japanese sites. The long-term data for AAODBC showed decreasing trends at all sites. We conclude that successful emission control policies were the major underlying driver of AODT and AAODBC reductions over East Asia, particularly in China, during the study period. Values of the AAODBC/AODT ratio revealed that, although these policies were successful, the Chinese government needs to undertake stricter measures toward reducing BC emissions. We found that AAODBC follows seasonal trends, peaking in the colder months. This suggests that in East Asia, particularly in China, domestic coal burning is still of concern. View Full-Text
Keywords: absorption aerosol optical depth (AAOD); black carbon (BC); depolarization ratio (DPR); single scattering albedo (SSA); Asian dust absorption aerosol optical depth (AAOD); black carbon (BC); depolarization ratio (DPR); single scattering albedo (SSA); Asian dust
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MDPI and ACS Style

Dehkhoda, N.; Noh, Y.; Joo, S. Long-Term Variation of Black Carbon Absorption Aerosol Optical Depth from AERONET Data over East Asia. Remote Sens. 2020, 12, 3551. https://doi.org/10.3390/rs12213551

AMA Style

Dehkhoda N, Noh Y, Joo S. Long-Term Variation of Black Carbon Absorption Aerosol Optical Depth from AERONET Data over East Asia. Remote Sensing. 2020; 12(21):3551. https://doi.org/10.3390/rs12213551

Chicago/Turabian Style

Dehkhoda, Naghmeh; Noh, Youngmin; Joo, Sohee. 2020. "Long-Term Variation of Black Carbon Absorption Aerosol Optical Depth from AERONET Data over East Asia" Remote Sens. 12, no. 21: 3551. https://doi.org/10.3390/rs12213551

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