Black carbon aerosol at McMurdo Station, Antarctica.
J Air Waste Manag Assoc
; 51(4): 593-600, 2001 Apr.
Article
en En
| MEDLINE
| ID: mdl-11321916
Aerosol light absorption as black carbon (BC) was measured from November 19, 1995, to February 6, 1996, at a location 0.65 km downwind of the center of McMurdo Station on the Antarctic coast. The results show a bimodal frequency distribution of BC concentrations. Approximately 65% of the measurements were found in a mode at a low range of concentrations centered at approximately 20 ng/m3. These concentrations are higher than those found at other remote Antarctic locations and probably represent contamination from the station. The remaining measurements were in a high-concentration mode (BC approximately 300 ng/m3), indicating direct impact of local emissions from combustion activities at the station. High values of BC were associated with winds from the direction of the station, and the BC flux showed a clear directionality. Maximum BC concentrations occurred between 7:00 and 11:00 a.m. The "polluted" mode accounted for more than 80% of the BC frequency-weighted impact at this location.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Carbono
/
Monitoreo del Ambiente
/
Contaminación del Aire
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
J Air Waste Manag Assoc
Asunto de la revista:
SAUDE AMBIENTAL
Año:
2001
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos