Black carbon and other light-absorbing impurities in snow in the Chilean Andes
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2019Metadata
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Rowe, Penny M.
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Black carbon and other light-absorbing impurities in snow in the Chilean Andes
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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
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URI: https://repositorio.uchile.cl/handle/2250/171735
DOI: 10.1038/s41598-019-39312-0
ISSN: 20452322
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Scientific Reports, Volumen 9, Issue 1, 2019,
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