Abstract:
On 4 June 2011, the volcanic complex Puyehue-Cordon Caulle located in the Chilean Andes erupted, producing a plume of gases and particles that eventually circled the Southern Hemisphere, disrupting air travel and depositing ash in large quantities. On eight occasions, the plume passed over the city of Buenos Aires, Argentina, leading local authorities to close the two international airports.
The eruption occurred during an on-going field campaign when measurements of the properties of atmospheric aerosol particles were being made in Buenos Aires as part of a year-long study of the concentration and optical properties of aerosol at one site in the city. The suite of instruments deployed in Buenos Aires were not tailored to measurements of volcanic ash, but were designed to characterize urban conditions. Nevertheless, these measurements were analysed for periods when vertical profiles of aerosol backscatter, made with a ceilometer, clearly showed the presence of the volcano plume over the research site and resulted in airport closure.
Aerosol optical thickness derived from AERONET, MODIS and a ceilometer at our research site, all show enhanced values clearly indicating that the three platforms identified the volcanic plume simultaneously. However, a quantitative comparison of the different estimates proves difficult, suggesting large spatial and temporal variability of the plume.
Our results indicate that the number concentration of condensation nuclei (CN), the mass concentration of particle-bound polycyclic aromatic hydrocarbons (PPAH) and the light absorption coefficient exceeded the average background values by more than one standard deviation during the events of volcanic plume. The anomalous concentrations of CN suggest new particle formation, presumably from the conversion of SO2, while the anomalous concentrations of PPAH may come from the uptake of PAHs on the plume particles or from chemical reactions on the surface of plume particles. The anomalous absorption coefficients indicate that plume particles may contain certain compounds that can absorb radiation at 550 nm. Another possible explanation consistent with the observations is the scavenging of black carbon from urban sources as the plume descends through the boundary layer to the surface. In addition, the volcanic plume influenced the local meteorology resulting in a decrease of the temperature when compared to the average temperature during days with no plume present. © Author(s) 2013.
Registro:
Documento: |
Artículo
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Título: | The environmental impact of the Puyehue-Cordon Caulle 2011 volcanic eruption on Buenos Aires |
Autor: | Raga, G.B.; Baumgardner, D.; Ulke, A.G.; Torres Brizuela, M.; Kucienska, B. |
Filiación: | Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, DF, Mexico Droplet Measurement Technologies, Boulder, CO, United States Departamento de Ciencias de la Atmósfera y Los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina U. Mixta Internacional Andndash; Inst. Franco Argentino Sobre Estudios de Clima y Sus Impactos /CNRS, Buenos Aires, Argentina
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Palabras clave: | absorption; environmental impact; light effect; MODIS; PAH; quantitative analysis; Southern Hemisphere; spatial variation; temporal variation; volcanic aerosol; volcanic ash; volcanic eruption; Argentina; Buenos Aires [Federal District]; Chile; Federal District [Argentina]; Los Lagos; Puyehue |
Año: | 2013
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Volumen: | 13
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Número: | 9
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Página de inicio: | 2319
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Página de fin: | 2330
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DOI: |
http://dx.doi.org/10.5194/nhess-13-2319-2013 |
Título revista: | Natural Hazards and Earth System Sciences
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Título revista abreviado: | Nat. Hazards Earth Syst. Sci.
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ISSN: | 15618633
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15618633_v13_n9_p2319_Raga |
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Citas:
---------- APA ----------
Raga, G.B., Baumgardner, D., Ulke, A.G., Torres Brizuela, M. & Kucienska, B.
(2013)
. The environmental impact of the Puyehue-Cordon Caulle 2011 volcanic eruption on Buenos Aires. Natural Hazards and Earth System Sciences, 13(9), 2319-2330.
http://dx.doi.org/10.5194/nhess-13-2319-2013---------- CHICAGO ----------
Raga, G.B., Baumgardner, D., Ulke, A.G., Torres Brizuela, M., Kucienska, B.
"The environmental impact of the Puyehue-Cordon Caulle 2011 volcanic eruption on Buenos Aires"
. Natural Hazards and Earth System Sciences 13, no. 9
(2013) : 2319-2330.
http://dx.doi.org/10.5194/nhess-13-2319-2013---------- MLA ----------
Raga, G.B., Baumgardner, D., Ulke, A.G., Torres Brizuela, M., Kucienska, B.
"The environmental impact of the Puyehue-Cordon Caulle 2011 volcanic eruption on Buenos Aires"
. Natural Hazards and Earth System Sciences, vol. 13, no. 9, 2013, pp. 2319-2330.
http://dx.doi.org/10.5194/nhess-13-2319-2013---------- VANCOUVER ----------
Raga, G.B., Baumgardner, D., Ulke, A.G., Torres Brizuela, M., Kucienska, B. The environmental impact of the Puyehue-Cordon Caulle 2011 volcanic eruption on Buenos Aires. Nat. Hazards Earth Syst. Sci. 2013;13(9):2319-2330.
http://dx.doi.org/10.5194/nhess-13-2319-2013