Apportionment of black carbon in the South Shetland Islands, Antarctic Peninsula

Simultaneous time series measurements of black carbon (BC), aerosol particle number (ANC), radon, and SEM‐EDS analysis for total carbon were collected at the Brazilian Antarctic station Ferraz, northwest of the Antarctic Peninsula (62°05′S, 58°23.5′W) for the years of 1993, 1997, and 1998. A new dat...

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Vydáno v:	Journal of Geophysical Research. D. Atmospheres Ročník 111; číslo D3
Hlavní autoři:	Pereira, Enio Bueno, Evangelista, Heitor, Pereira, Kely Cristine Dalia, Cavalcanti, Iracema F. A., Setzer, Alberto W.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	Washington, DC Blackwell Publishing Ltd 16.02.2006 American Geophysical Union
Témata:	aerosol Antarctica atmospheric pollution biomass burning black carbon Earth sciences Earth, ocean, space Exact sciences and technology radon Brazil Antarctica Scotia Sea South Shetland Islands Scotia Sea Islands Antarctic Peninsula Antarctica, Antarctic Peninsula Antarctica, South Shetland Is South America radon aerosols Soot Wind velocity global Low level jet principal components analysis coupling Winter carbon Spring(season) polar regions particles scanning electron microscopy models Regional scope Time series concentration transport loading Long term contamination new data Shielding effect circulation Antarctic Ocean Vegetation fire
ISSN:	0148-0227, 2156-2202
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Popis
Shrnutí:	Simultaneous time series measurements of black carbon (BC), aerosol particle number (ANC), radon, and SEM‐EDS analysis for total carbon were collected at the Brazilian Antarctic station Ferraz, northwest of the Antarctic Peninsula (62°05′S, 58°23.5′W) for the years of 1993, 1997, and 1998. A new data screening technique was applied in an effort to distinguish long‐range from local contaminations of BC. Analyses of data revealed a small increase in BC concentration during winter‐to‐spring seasons. The mean annual BC concentration of 8.3 ng m−3 was consistent with global model estimates for this region. The intermittent coupling mechanism between the regional circulation of the low‐level jets and the passages of the frontal systems explained the transport of BC from areas of burning biomass in Brazil to the northern Antarctic Peninsula. Principal component analysis applied to BC, Radon, ANC, and meteorological data presented significant factor loadings linking BC with 222Rn and with wind velocity corroborating with this hypothesis.
Bibliografie:	istex:904B648895D479535065157499DA635BF80290CF ark:/67375/WNG-1SK8B9XH-S ArticleID:2005JD006086 Tab-delimited Table 1. ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	0148-0227 2156-2202
DOI:	10.1029/2005JD006086