globalchange  > 气候变化事实与影响
DOI: 10.1016/j.atmosenv.2017.07.012
Scopus ID: 2-s2.0-85023618407
Long term fine aerosols at the Cape Grim global baseline station: 1998 to 2016
Author: Crawford J; , Cohen D; D; , Stelcer E; , Atanacio A; J
Source Publication: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
Publishing Year: 2017
Volume: 166
pages begin: 34
pages end: 46
Language: 英语
Keyword: Aerosols ; Baseline ; Cape grim ; Positive matrix factorisation
Scopus Keyword: Dust ; Nitrates ; Nitrogen compounds ; Soils ; Back trajectory analysis ; Baseline ; Cape grim ; Central business districts ; Elemental compositions ; Ion beam analysis techniques ; Maximum concentrations ; Positive matrix factorisation ; Aerosols ; aluminum ; nitric acid derivative ; sodium chloride ; sulfate ; sulfur dioxide ; aerosol ; baseline conditions ; concentration (composition) ; dust ; exhaust emission ; long range transport ; reaction kinetics ; sea salt ; smoke ; sodium chloride ; traffic emission ; aerosol ; air pollution ; air sampling ; Article ; behavior ; chemical reaction ; comparative study ; concentration (parameters) ; dust ; elemental analysis ; finger dermatoglyphics ; measurement ; metal industry ; particulate matter ; priority journal ; sea ; season ; smoke ; soil ; statistics ; Tasmania ; Australia ; Cape Grim ; Lucas Heights ; New South Wales ; Sydney [New South Wales] ; Tasmania
Subject of Scopus: Environmental Science: Water Science and Technology ; Earth and Planetary Sciences: Earth-Surface Processes ; Environmental Science: Environmental Chemistry
English Abstract: Fine aerosol measurements have been undertaken at the Cape Grim global baseline station since 1992. Ion beam analysis techniques were then used to determine the elemental composition of the samples from which source fingerprints can be determined. In this study six source fingerprints were identified to contribute to the measurements of PM2.5 at Cape Grim (from 1998 to 2016); fresh sea salt (57%), secondary sulfate and nitrates (14%), smoke (13%), aged sea salt (the product of NaCl reactions with SO2; 12%), soil dust (2.4%) and industrial metals (1.5%). Back trajectory analysis showed that local Tasmanian sources of soil dust contributed to the high soil dust measurements. High measurements of secondary aerosols were recorded when air masses were arriving from the Australian mainland, in the direction of the Victorian power stations. When air masses were arriving from the baseline sector, the maximum concentration of aged sea salt was 1.3 μg/m3, compared to overall maximum of 4.9 μg/m3. For secondary sulfates and nitrates the maximum concentrations were 2.5 and 7.5 μg/m3 from the baseline sector and overall, respectively. While measurements at Cape Grim can be affected from long range transport from mainland Australia and some local Tasmanian sources, the average concentrations of anthropogenic sources are still considerably lower than those measured at more populated areas. For example, at Lucas Heights (located south-west of the Sydney central business district, with little local sources) the average concentrations of secondary sulfates/nitrates and aged sea air were 1.4 and 1.0 μg/m3, respectively; compared to average concentrations of 0.8 and 0.6 μg/m3, at Cape Grim. The average concentrations of smoke were compatible at the two sites. The impact of primary aerosols from vehicle exhaust at Cape Grim was limited and no corresponding fingerprint was resolved. © 2017
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Affiliation: Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, Australia

Recommended Citation:
Crawford J,, Cohen D,D,et al. Long term fine aerosols at the Cape Grim global baseline station: 1998 to 2016[J]. Atmospheric Environment,2017-01-01,166
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