Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America
The Pierre Auger Observatory is making significant contributions towards understanding the nature and origin of ultra-high energy cosmic rays. One of its main challenges is the monitoring of the atmosphere, both in terms of its state variables and its optical properties. The aim of this work is to a...
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2014
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01698095_v149_n_p120_Aab http://hdl.handle.net/20.500.12110/paper_01698095_v149_n_p120_Aab |
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paper:paper_01698095_v149_n_p120_Aab2023-06-08T15:18:31Z Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America Aerosol Air masses Atmospheric effect Cosmic ray GDAS HYSPLIT Aerosols Atmospheric aerosols Augers Cosmic rays Observatories Aerosol concentration Aerosol optical depths Air mass Atmospheric effects GDAS HYSPLIT Pierre Auger observatory Ultra high-energy cosmic rays Meteorology aerosol property air mass concentration (composition) optical depth trajectory urban area urban atmosphere Argentina The Pierre Auger Observatory is making significant contributions towards understanding the nature and origin of ultra-high energy cosmic rays. One of its main challenges is the monitoring of the atmosphere, both in terms of its state variables and its optical properties. The aim of this work is to analyse aerosol optical depth τ a (z) values measured from 2004 to 2012 at the observatory, which is located in a remote and relatively unstudied area of Pampa Amarilla, Argentina. The aerosol optical depth is in average quite low - annual mean τ a (3.5km)~0.04 - and shows a seasonal trend with a winter minimum - τ a (3.5km)~0.03 -, and a summer maximum - τ a (3.5km)~0.06 -, and an unexpected increase from August to September - τ a (3.5km)~0.055. We computed backward trajectories for the years 2005 to 2012 to interpret the air mass origin. Winter nights with low aerosol concentrations show air masses originating from the Pacific Ocean. Average concentrations are affected by continental sources (wind-blown dust and urban pollution), whilst the peak observed in September and October could be linked to biomass burning in the northern part of Argentina or air pollution coming from surrounding urban areas. © 2014 Elsevier B.V. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01698095_v149_n_p120_Aab http://hdl.handle.net/20.500.12110/paper_01698095_v149_n_p120_Aab |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Aerosol Air masses Atmospheric effect Cosmic ray GDAS HYSPLIT Aerosols Atmospheric aerosols Augers Cosmic rays Observatories Aerosol concentration Aerosol optical depths Air mass Atmospheric effects GDAS HYSPLIT Pierre Auger observatory Ultra high-energy cosmic rays Meteorology aerosol property air mass concentration (composition) optical depth trajectory urban area urban atmosphere Argentina |
| spellingShingle |
Aerosol Air masses Atmospheric effect Cosmic ray GDAS HYSPLIT Aerosols Atmospheric aerosols Augers Cosmic rays Observatories Aerosol concentration Aerosol optical depths Air mass Atmospheric effects GDAS HYSPLIT Pierre Auger observatory Ultra high-energy cosmic rays Meteorology aerosol property air mass concentration (composition) optical depth trajectory urban area urban atmosphere Argentina Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America |
| topic_facet |
Aerosol Air masses Atmospheric effect Cosmic ray GDAS HYSPLIT Aerosols Atmospheric aerosols Augers Cosmic rays Observatories Aerosol concentration Aerosol optical depths Air mass Atmospheric effects GDAS HYSPLIT Pierre Auger observatory Ultra high-energy cosmic rays Meteorology aerosol property air mass concentration (composition) optical depth trajectory urban area urban atmosphere Argentina |
| description |
The Pierre Auger Observatory is making significant contributions towards understanding the nature and origin of ultra-high energy cosmic rays. One of its main challenges is the monitoring of the atmosphere, both in terms of its state variables and its optical properties. The aim of this work is to analyse aerosol optical depth τ a (z) values measured from 2004 to 2012 at the observatory, which is located in a remote and relatively unstudied area of Pampa Amarilla, Argentina. The aerosol optical depth is in average quite low - annual mean τ a (3.5km)~0.04 - and shows a seasonal trend with a winter minimum - τ a (3.5km)~0.03 -, and a summer maximum - τ a (3.5km)~0.06 -, and an unexpected increase from August to September - τ a (3.5km)~0.055. We computed backward trajectories for the years 2005 to 2012 to interpret the air mass origin. Winter nights with low aerosol concentrations show air masses originating from the Pacific Ocean. Average concentrations are affected by continental sources (wind-blown dust and urban pollution), whilst the peak observed in September and October could be linked to biomass burning in the northern part of Argentina or air pollution coming from surrounding urban areas. © 2014 Elsevier B.V. |
| title |
Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America |
| title_short |
Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America |
| title_full |
Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America |
| title_fullStr |
Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America |
| title_full_unstemmed |
Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America |
| title_sort |
origin of atmospheric aerosols at the pierre auger observatory using studies of air mass trajectories in south america |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01698095_v149_n_p120_Aab http://hdl.handle.net/20.500.12110/paper_01698095_v149_n_p120_Aab |
| _version_ |
1768545001487204352 |