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dc.contributor.author
Vergara Dal Pont, Iván Pablo
dc.contributor.author
Garreaud, René
dc.contributor.author
Ayala, Álvaro
dc.date.available
2023-09-26T16:20:15Z
dc.date.issued
2022-06
dc.identifier.citation
Vergara Dal Pont, Iván Pablo; Garreaud, René; Ayala, Álvaro; Sharp Increase of Extreme Turbidity Events Due To Deglaciation in the Subtropical Andes; John Wiley & Sons; Journal of Geophysical Research: Earth Surface; 127; 6; 6-2022; 1-15
dc.identifier.issn
2169-9003
dc.identifier.uri
http://hdl.handle.net/11336/213111
dc.description.abstract
Climate change may affect sediment fluvial export from high mountain regions, leading to downstream environmental disruptions and direct impacts on human activities. In this paper, three decades (1990–2020) of turbidity measurements, along with climate and hydro-glaciological variables, were used to investigate the interannual and interdecadal variability in the number of extreme turbidity events (ETE) in the glacierized Maipo River basin, located in the western subtropical Andes. ETE are defined as a sequence of days (most often 1 or 2) during which the daily maximum turbidity was in the 99% quantile of the entire study period. Some of these events compromised the drinking water provision for the city of Santiago, with more than 6 million inhabitants. ETE are more frequent during summer and are mostly associated with melt-favourable conditions. The number of ETE tends to increase in summers with large glacier ice melt and low snowmelt (outside or over glaciers). Most notable, the mean annual number of ETE exhibits a 6-fold increase in the last decade compared with the 1990–2010 period. After 2010, ETE also shifted their seasonal maximum from late spring to mid-summer and their occurrence became strongly coupled with large ice melt rates. We hypothesize that such regime change was caused by an enhanced hydrological connectivity of subglacial sediment pools that increased the sensitivity of the sediment system to glacier melt. The latter is in line with recent research and is consistent with the ongoing glacier retreat due to strong regional warming and drying.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Turbidez
dc.subject
Andes
dc.subject
Glaciares
dc.subject
Cambio climático
dc.subject.classification
Geociencias multidisciplinaria
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Sharp Increase of Extreme Turbidity Events Due To Deglaciation in the Subtropical Andes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-14T10:46:30Z
dc.identifier.eissn
2169-9011
dc.journal.volume
127
dc.journal.number
6
dc.journal.pagination
1-15
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva Jersey
dc.description.fil
Fil: Vergara Dal Pont, Iván Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales. Universidad Nacional del Comahue. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina
dc.description.fil
Fil: Garreaud, René. Universidad de Chile; Chile. Center for Climate and Resilience Research Santiago; Chile
dc.description.fil
Fil: Ayala, Álvaro. Comisión Nacional de Investigación Científica y Tecnológica. Centro de Investigación Regional. Centro de Estudios en Zonas Áridas; Chile
dc.journal.title
Journal of Geophysical Research: Earth Surface
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021JF006584
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1029/2021JF006584
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