Rapid decline in extratropical Andean snow cover driven by the poleward migration of the Southern Hemisphere westerlies

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dc.contributor.authorCordero, Raúl R.
dc.contributor.authorFeron, Sarah
dc.contributor.authorDamiani, Alessandro
dc.contributor.authorMacDonell, Shelley
dc.contributor.authorCarrasco, Jorge
dc.contributor.authorPizarro, Jaime
dc.contributor.authorKaras, Cyrus
dc.contributor.authorJorquera, Jose
dc.contributor.authorSepulveda, Edgardo
dc.contributor.authorCabello, Fernanda
dc.contributor.authorFernandoy, Francisco
dc.contributor.authorWang, Chenghao
dc.date.accessioned2025-03-24T16:21:22Z
dc.date.available2025-03-24T16:21:22Z
dc.date.issued2024-12
dc.descriptionIndexación (Scopus)
dc.description.abstractSeasonal snow in the extratropical Andes is a primary water source for major rivers supplying water for drinking, agriculture, and hydroelectric power in Central Chile. Here, we used estimates from the Moderate Resolution Imaging Spectroradiometer (MODIS) to analyze changes in snow cover extent over the period 2001–2022 in a total of 18 watersheds spanning approximately 1,100 km across the Chilean Andes (27–36°S). We found that the annual snow cover extent is receding in the watersheds analyzed at an average pace of approximately 19% per decade. These alarming trends have impacted meltwater runoff, resulting in historically low river streamflows during the dry season. We examined streamflow records dating back to the early 1980s for 10 major rivers within our study area. Further comparisons with large-scale climate modes suggest that the detected decreasing trends in snow cover extent are likely driven by the poleward migration of the westerly winds associated with a positive trend in the Southern Annular Mode (SAM).
dc.description.urihttps://link.springer.com/article/10.1007/s12187-024-10174-x?utm_source=getftr&utm_medium=getftr&utm_campaign=getftr_pilot&getft_integrator=scopus
dc.identifier.citationScientific Reports Volume 14, Issue 1 December 2024 Article number 26365
dc.identifier.doi10.1007/s12187-024-10174-x
dc.identifier.issn2045-2322
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/63852
dc.language.isoen_US
dc.publisherNature Research
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectAndes
dc.subjectClimate Change
dc.subjectSnow
dc.titleRapid decline in extratropical Andean snow cover driven by the poleward migration of the Southern Hemisphere westerlies
dc.typeArtículo
dcterms.rightsAtribución/Reconocimiento 4.0 Internacional
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