Prefacing unexplored archives from Central Andean surface-to-bedrock ice cores through a multifaceted investigation of regional firn and ice core glaciochemistry.
dc.contributor.author | Clifford, Heather M. | pt_BR |
dc.contributor.author | Potocki, Mariusz | pt_BR |
dc.contributor.author | Rodda, Charles | pt_BR |
dc.contributor.author | Dixon, Daniel A. | pt_BR |
dc.contributor.author | Birkel, Sean | pt_BR |
dc.contributor.author | Handley, Michael | pt_BR |
dc.contributor.author | Korotkikh, Elena | pt_BR |
dc.contributor.author | Introne, Douglas | pt_BR |
dc.contributor.author | Carlos, Franciéle Schwanck | pt_BR |
dc.contributor.author | Tavares, Flavia Alves | pt_BR |
dc.contributor.author | Bernardo, Ronaldo T. | pt_BR |
dc.contributor.author | Lindau, Filipe Gaudie Ley | pt_BR |
dc.contributor.author | Gomez, Oscar Vilca | pt_BR |
dc.contributor.author | Jara-Infantes, Harrison | pt_BR |
dc.contributor.author | Bustínza Urviola, Victor | pt_BR |
dc.contributor.author | Perry, L. Baker | pt_BR |
dc.contributor.author | Maurer, Jonathan | pt_BR |
dc.contributor.author | Seimon, Anton | pt_BR |
dc.contributor.author | Schwikowski, Margit | pt_BR |
dc.contributor.author | Casassa, Gino | pt_BR |
dc.date.accessioned | 2023-09-09T03:30:08Z | pt_BR |
dc.date.issued | 2023 | pt_BR |
dc.identifier.issn | 1727-5652 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/264341 | pt_BR |
dc.description.abstract | Shallow firn cores, in addition to a near-basal ice core, were recovered in 2018 from the Quelccaya ice cap (5470 m a.s.l) in the Cordillera Vilcanota, Peru, and in 2017 from the Nevado Illimani glacier (6350 m a.s.l) in the Cordillera Real, Bolivia. The two sites are ~450 km apart. Despite meltwater percolation resulting from warming, particle-based trace element records (e.g. Fe, Mg, K) in the Quelccaya and Illimani shallow cores retain well-preserved signals. The firn core chronologies, established independently by annual layer counting, show a convincing overlap indicating the two records contain comparable signals and therefore capture similar regional scale climatology. Trace element records at a ~1?4 cm resolution provide past records of anthropogenic emissions, dust sources, volcanic emissions, evaporite salts and marine-sourced air masses. Using novel ultra-high-resolution (120 ?m) laser technology, we identify annual layer thicknesses ranging from 0.3 to 0.8 cm in a section of 2000-year-old radiocarbon-dated near-basal ice which compared to the previous annual layer estimates suggests that Quelccaya ice cores drilled to bedrock may be older than previously suggested by depth-age models. With the information collected from this study in combination with past studies, we emphasize the importance of collecting new surface-to-bedrock ice cores from at least the Quelccaya ice cap, in particular, due to its projected disappearance as soon as the 2050s. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Journal of Glaciology. Cambridge [Inglaterra]. Vol. 69, no. 276 (Aug. 2023), p. 693-707 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Climate change | en |
dc.subject | Mudanças climáticas | pt_BR |
dc.subject | Glaciological instruments and methods | en |
dc.subject | Glacioquímica | pt_BR |
dc.subject | Testemunhos de gelo | pt_BR |
dc.subject | Ice chemistry | en |
dc.subject | Vilcanota, Cordilheira (Peru) | pt_BR |
dc.subject | Ice core | en |
dc.subject | Real, Cordilheira (Bolívia) | pt_BR |
dc.subject | Mountain glaciers | en |
dc.title | Prefacing unexplored archives from Central Andean surface-to-bedrock ice cores through a multifaceted investigation of regional firn and ice core glaciochemistry. | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001175055 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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