气候变化领域集成服务门户(CCPortal): Year-Round Measurements of Dissolved Black Carbon in Coastal Southeast Asia Aerosols: Rethinking Its Atmospheric Deposition in the Ocean

CCPortal

DOI	10.1029/2021JD034590
	Year-Round Measurements of Dissolved Black Carbon in Coastal Southeast Asia Aerosols: Rethinking Its Atmospheric Deposition in the Ocean
	Geng X.; Zhong G.; Liu J.; Sun Y.; Yi X.; Bong C.W.; Zakaria M.P.; Gustafsson Ö.; Ouyang Y.; Zhang G.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:18
英文摘要	Dissolved black carbon (DBC) is an important recalcitrant fraction of marine dissolved organic matter. Riverine discharge is the largest known source of oceanic DBC; however, the significance of atmospheric deposition as a source of oceanic DBC remains poorly understood. In this study, year-round aerosol sampling was carried out at a rural coastal site in Southeast Asia for DBC analysis using the benzene polycarboxylic acid (BPCA) method. The results revealed the uncertainty of an earlier estimate of the atmospheric deposition flux of DBC to the global ocean (FDBC), which assumed a linear correlation between DBC and water-soluble organic carbon (WSOC). The correlation between DBC and WSOC depended on the sources of carbonaceous aerosols. The DBC/WSOC ratios were higher for the biomass burning aerosols. DBC was linearly correlated with black carbon (BC) for biomass or fossil fuel combustion aerosols. However, the DBC/BC ratios were higher for biomass burning aerosols (0.41 ± 0.22), whereas lower for fossil fuel combustion aerosols (0.04 ± 0.03). FDBC was revisited based on the relationship between DBC and BC. FDBC is primarily contributed by biomass burning aerosols and maybe previously underestimated. In this study, the DBC in aerosols had less condensed aromatic structures than the DBC present in the major rivers of the world, as shown by the BPCA compositions. This indicated that oceanic DBC sourced from atmospheric deposition was less likely to be removed by photodegradation and sedimentation, as compared to the DBC sourced from riverine discharge. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric deposition; benzene polycarboxylic acid; black carbon cycle; dissolved black carbon; marine aerosols
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/236998
作者单位	State Key Laboratory of Organic Geochemistry, and Guangdong-Hong Kong-Macao Joint Laboratory for Environmental Pollution and Control, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People's Republic of China, Nanjing, China; CAS Center for Excellence in Deep Earth Science, Guangzhou, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; Institute of Ocean and Earth Sciences (IOES), University of Malaya, Kuala Lumpur, Malaysia; Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia; Department of Environmental Science, Stockholm University, Stockholm, Sweden
推荐引用方式 GB/T 7714	Geng X.,Zhong G.,Liu J.,et al. Year-Round Measurements of Dissolved Black Carbon in Coastal Southeast Asia Aerosols: Rethinking Its Atmospheric Deposition in the Ocean[J],2021,126(18).
APA	Geng X..,Zhong G..,Liu J..,Sun Y..,Yi X..,...&Zhang G..(2021).Year-Round Measurements of Dissolved Black Carbon in Coastal Southeast Asia Aerosols: Rethinking Its Atmospheric Deposition in the Ocean.Journal of Geophysical Research: Atmospheres,126(18).
MLA	Geng X.,et al."Year-Round Measurements of Dissolved Black Carbon in Coastal Southeast Asia Aerosols: Rethinking Its Atmospheric Deposition in the Ocean".Journal of Geophysical Research: Atmospheres 126.18(2021).