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Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America

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Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America

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dc.contributor.author The Pierre Auger Collaboration
dc.contributor.author Pastor Carpi, Sergio
dc.date.accessioned 2015-02-24T09:34:27Z
dc.date.available 2015-02-24T09:34:27Z
dc.date.issued 2014
dc.identifier.citation The Pierre Auger Collaboration Pastor Carpi, Sergio 2014 Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America Atmospheric Research 149 120 135
dc.identifier.uri http://hdl.handle.net/10550/42251
dc.description.abstract 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 analyze aerosol optical depth τa(z) values measured from 2004 to 2012 at the observatory, which is located in a remote and relatively unstudied area of the Pampa Amarilla, Argentina. The aerosol optical depth is in average quite low - annual mean τa(3.5 km)∼0.04 - and shows a seasonal trend with a winter minimum - τa(3.5 km)∼0.03 -, and a summer maximum - τa(3.5 km)∼0.06 -, and an unexpected increase from August to September - τa(3.5 km)∼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), while 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.
dc.language.iso eng
dc.relation.ispartof Atmospheric Research, 2014, vol. 149, p. 120-135
dc.subject Meteorologia
dc.title Origin of atmospheric aerosols at the Pierre Auger Observatory using studies of air mass trajectories in South America
dc.type journal article es_ES
dc.date.updated 2015-02-24T09:34:27Z
dc.identifier.doi 10.1016/j.atmosres.2014.05.021
dc.identifier.idgrec 101535
dc.rights.accessRights open access es_ES

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