期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 544, 期 -, 页码 606-616出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2015.11.166
关键词
Biomass burning; Levoglucosan; Phenolic compounds; Antarctica; Aerosols
资金
- Italian Programma Nazionale di Ricerche in Antartide (PNRA) [2009/A2.11]
- National Research Council of Italy (CNR)
- ERC [267696]
- European Research Council (ERC) [267696] Funding Source: European Research Council (ERC)
Due to its isolated location, Antarctica is a natural laboratory for studying atmospheric aerosols and pollution in remote areas. Here, we determined levoglucosan and phenolic compounds (PCs) at diverse Antarctic sites: on the plateau, a coastal station and during an oceanographic cruise. Levoglucosan and PCs reached the Antarctic plateau where they were observed in accumulation mode aerosols (with median levoglucosan concentrations of 6.4 pgm(-3) and 4.1 pgm(-3), and median PC concentrations of 15.0 pgm(-3) and 7.3 pgm(-3)). Aged aerosols arrived at the coastal site through katabatic circulation with the majority of the levoglucosan mass distributed on larger particulates (24.8 pgm(-3)), while PCs were present in fine particles (34.0 pgm(-3)). The low levoglucosan/PC ratios in Antarctic aerosols suggest that biomass burning aerosols only had regional, rather than local, sources. General acid/aldehyde ratios were lower at the coastal site than on the plateau. Levoglucosan and PCs determined during the oceanographic cruise were 37.6 pgm(-3) and 58.5 pgm(-3) respectively. Unlike levoglucosan, which can only be produced by biomass burning, PCs have both biomass burning and other sources. Our comparisons of these two types of compounds across a range of Antarctic marine, coastal, and plateau sites demonstrate that local marine sources dominate Antarctic PC concentrations. (C) 2015 Elsevier B.V. All rights reserved.
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