Black carbon and other light-absorbing impurities in snow in the Chilean Andes
Author
dc.contributor.author
Rowe, Penny M.
Author
dc.contributor.author
Cordero, Raul R.
Author
dc.contributor.author
Warren, Stephen G.
Author
dc.contributor.author
Stewart, Emily
Author
dc.contributor.author
Doherty, Sarah J.
Author
dc.contributor.author
Pankow, Alec
Author
dc.contributor.author
Schrempf, Michael
Author
dc.contributor.author
Casassa, Gino
Author
dc.contributor.author
Carrasco, Jorge
Author
dc.contributor.author
Pizarro, Jaime
Author
dc.contributor.author
MacDonell, Shelley
Author
dc.contributor.author
Damiani, Alessandro
Author
dc.contributor.author
Lambert, Fabrice
Author
dc.contributor.author
Rondanelli, Roberto
Author
dc.contributor.author
Huneeus Lagos, Nicolás
Author
dc.contributor.author
Fe
Admission date
dc.date.accessioned
2019-10-15T12:25:36Z
Available date
dc.date.available
2019-10-15T12:25:36Z
Publication date
dc.date.issued
2019
Cita de ítem
dc.identifier.citation
Scientific Reports, Volumen 9, Issue 1, 2019,
Identifier
dc.identifier.issn
20452322
Identifier
dc.identifier.other
10.1038/s41598-019-39312-0
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/171735
Abstract
dc.description.abstract
Vertical profiles of black carbon (BC) and other light-absorbing impurities were measured in seasonal snow and permanent snowfields in the Chilean Andes during Austral winters 2015 and 2016, at 22 sites between latitudes 18°S and 41°S. The samples were analyzed for spectrally-resolved visible light absorption. For surface snow, the average mass mixing ratio of BC was 15 ng/g in northern Chile (18–33°S), 28 ng/g near Santiago (a major city near latitude 33°S, where urban pollution plays a significant role), and 13 ng/g in southern Chile (33–41°S). The regional average vertically-integrated loading of BC was 207 µg/m 2 in the north, 780 µg/m 2 near Santiago, and 2500 µg/m 2 in the south, where the snow season was longer and the snow was deeper. For samples collected at locations where there had been no new snowfall for a week or more, the BC concentration in surface snow was high (~10–100 ng/g) and the sub-surface snow was comparatively clean, indicating the domina