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Molecular Distributions and Compound-Specific Stable Carbon Isotopic Compositions of Plant Waxn-Alkanes in Marine Aerosols along a North-South Transect in the Arctic-Northwest Pacific Region

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Title
Molecular Distributions and Compound-Specific Stable Carbon Isotopic Compositions of Plant Waxn-Alkanes in Marine Aerosols along a North-South Transect in the Arctic-Northwest Pacific Region
Other Titles
북극-북서 태영양 지역의 남북 횡단구간 해양에어로졸의 식물기원 n-알칸의 분포도와 안정동위원소 조성 연구
Authors
Kim, Jung-Hyun
Park, Jiyeon
Kim, Sol-Bin
Shin, Kyung-Hoon
Kim, Sookwan
Gim, Yeontae
Subject
Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
Keywords
marine aerosol; n-alkanes; compound-specific carbon isotopes; Arctic Ocean; northwest Pacific Ocean
Issue Date
2020-05
Citation
Kim, Jung-Hyun, et al. 2020-05. "Molecular Distributions and Compound-Specific Stable Carbon Isotopic Compositions of Plant Waxn-Alkanes in Marine Aerosols along a North-South Transect in the Arctic-Northwest Pacific Region". ATMOSPHERE, 11(5): 499-510.
Abstract
A geographical source ofn-alkanes in marine aerosols was assessed along a North-South transect in the Arctic-Northwest Pacific region. Marine aerosol samples were collected during the ARA08 cruise with the R/V Araon between 28 August and 28 September 2017. We investigated molecular distributions ofn-alkanes (homologous series of C(16)to C-34) and compound-specific stable carbon isotopes (delta C-13) ofn-C-27,n-C-29, andn-C-31. Unresolved complex mixtures (UCM) showed a latitudinal trend from the Arctic Ocean to the northwest Pacific Ocean, highlighting an increasing influence of the plume of polluted air exported from East Asian countries. The anthropogenic input was further evidenced by high U/R ratios (>5) and low CPI17-23(0.6-1.4). The occurrence of high molecular weight (HMW)n-alkanes with high CPI27-31(>3) indicated the biogenic input of terrestrial higher plant leaf waxes in all studied samples. The delta C-13 of HMWn-alkanes was influenced by both the relative contributions from the C-3/C(4)plant sources and from fossil fuel combustions. The back-trajectory analyses provided evidence that changes in molecular distributions and delta C-13 ofn-alkanes were due to the long-range atmospheric transport of anthropogenic and biogenic organic materials from North American and East Asian countries to the Arctic Ocean and the remote northwest Pacific Ocean, respectively.
URI
https://repository.kopri.re.kr/handle/201206/12098
DOI
http://dx.doi.org/10.3390/atmos11050499
Appears in Collections  
2019-2019, Changes in environments and coastal geomorphology of Svalbard fjords, Arctic (19-19) / Nam, Seung-il (PN19090)
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