Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records
As rainfall in South-Central Chile has decreased in recent decades, local communities and industries have developed an understandable concern about their threatened water supply. Reconstructing streamflows from tree-ring data has been recognized as a useful paleoclimatic tool in providing long-term...
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ftconicet:oai:ri.conicet.gov.ar:11336/182683 2023-10-09T21:47:09+02:00 Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records Muñoz, Ariel A. González Reyes, Alvaro Lara, Antonio Sauchyn, David Christie, Duncan Puchi, Paulina Urrutia Jalabert, Rocío Toledo Guerrero, Isadora Aguilera Betti, Isabella Mundo, Ignacio Alberto Sheppard, Paul R. Stahle, Daniel Villalba, Ricardo Szejner, P. LeQuesne, Carlos Vanstone, Jessica application/pdf http://hdl.handle.net/11336/182683 eng eng Springer info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs00382-016-3068-9# info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-016-3068-9 http://hdl.handle.net/11336/182683 Muñoz, Ariel A.; González Reyes, Alvaro; Lara, Antonio; Sauchyn, David; Christie, Duncan; et al.; Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records; Springer; Climate Dynamics; 47; 12; 3-2016; 4051-4066 0930-7575 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ BIOBÍO RIVER HYDROCLIMATE VARIABILITY SOUTHERN ANNULAR MODE STREAMFLOW RECONSTRUCTIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1007/s00382-016-3068-9 2023-09-24T20:28:08Z As rainfall in South-Central Chile has decreased in recent decades, local communities and industries have developed an understandable concern about their threatened water supply. Reconstructing streamflows from tree-ring data has been recognized as a useful paleoclimatic tool in providing long-term perspectives on the temporal characteristics of hydroclimate systems. Multi-century long streamflow reconstructions can be compared to relatively short instrumental observations in order to analyze the frequency of low and high water availability through time. In this work, we have developed a Biobío River streamflow reconstruction to explore the long-term hydroclimate variability at the confluence of the Mediterranean-subtropical and the Temperate-humid climate zones, two regions represented by previous reconstructions of the Maule and Puelo Rivers, respectively. In a suite of analyses, the Biobío River reconstruction proves to be more similar to the Puelo River than the Maule River, despite its closer geographic proximity to the latter. This finding corroborates other studies with instrumental data that identify 37.5°S as a latitudinal confluence of two climate zones. The analyzed rivers are affected by climate forcings on interannual and interdecadal time-scales, Tropical (El Niño Southern Oscillation) and Antarctic (Southern Annular Mode; SAM). Longer cycles found, around 80-years, are well correlated only with SAM variation, which explains most of the variance in the Biobío and Puelo rivers. This cycle also has been attributed to orbital forcing by other authors. All three rivers showed an increase in the frequency of extreme high and low flow events in the twentieth century. The most extreme dry and wet years in the instrumental record (1943–2000) were not the most extreme of the past 400-years reconstructed for the three rivers (1600–2000), yet both instrumental record years did rank in the five most extreme of the streamflow reconstructions as a whole. These findings suggest a high level of natural variability ... Article in Journal/Newspaper Antarc* Antarctic CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Climate Dynamics 47 12 4051 4066 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
BIOBÍO RIVER HYDROCLIMATE VARIABILITY SOUTHERN ANNULAR MODE STREAMFLOW RECONSTRUCTIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
BIOBÍO RIVER HYDROCLIMATE VARIABILITY SOUTHERN ANNULAR MODE STREAMFLOW RECONSTRUCTIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Muñoz, Ariel A. González Reyes, Alvaro Lara, Antonio Sauchyn, David Christie, Duncan Puchi, Paulina Urrutia Jalabert, Rocío Toledo Guerrero, Isadora Aguilera Betti, Isabella Mundo, Ignacio Alberto Sheppard, Paul R. Stahle, Daniel Villalba, Ricardo Szejner, P. LeQuesne, Carlos Vanstone, Jessica Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records |
topic_facet |
BIOBÍO RIVER HYDROCLIMATE VARIABILITY SOUTHERN ANNULAR MODE STREAMFLOW RECONSTRUCTIONS https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
As rainfall in South-Central Chile has decreased in recent decades, local communities and industries have developed an understandable concern about their threatened water supply. Reconstructing streamflows from tree-ring data has been recognized as a useful paleoclimatic tool in providing long-term perspectives on the temporal characteristics of hydroclimate systems. Multi-century long streamflow reconstructions can be compared to relatively short instrumental observations in order to analyze the frequency of low and high water availability through time. In this work, we have developed a Biobío River streamflow reconstruction to explore the long-term hydroclimate variability at the confluence of the Mediterranean-subtropical and the Temperate-humid climate zones, two regions represented by previous reconstructions of the Maule and Puelo Rivers, respectively. In a suite of analyses, the Biobío River reconstruction proves to be more similar to the Puelo River than the Maule River, despite its closer geographic proximity to the latter. This finding corroborates other studies with instrumental data that identify 37.5°S as a latitudinal confluence of two climate zones. The analyzed rivers are affected by climate forcings on interannual and interdecadal time-scales, Tropical (El Niño Southern Oscillation) and Antarctic (Southern Annular Mode; SAM). Longer cycles found, around 80-years, are well correlated only with SAM variation, which explains most of the variance in the Biobío and Puelo rivers. This cycle also has been attributed to orbital forcing by other authors. All three rivers showed an increase in the frequency of extreme high and low flow events in the twentieth century. The most extreme dry and wet years in the instrumental record (1943–2000) were not the most extreme of the past 400-years reconstructed for the three rivers (1600–2000), yet both instrumental record years did rank in the five most extreme of the streamflow reconstructions as a whole. These findings suggest a high level of natural variability ... |
format |
Article in Journal/Newspaper |
author |
Muñoz, Ariel A. González Reyes, Alvaro Lara, Antonio Sauchyn, David Christie, Duncan Puchi, Paulina Urrutia Jalabert, Rocío Toledo Guerrero, Isadora Aguilera Betti, Isabella Mundo, Ignacio Alberto Sheppard, Paul R. Stahle, Daniel Villalba, Ricardo Szejner, P. LeQuesne, Carlos Vanstone, Jessica |
author_facet |
Muñoz, Ariel A. González Reyes, Alvaro Lara, Antonio Sauchyn, David Christie, Duncan Puchi, Paulina Urrutia Jalabert, Rocío Toledo Guerrero, Isadora Aguilera Betti, Isabella Mundo, Ignacio Alberto Sheppard, Paul R. Stahle, Daniel Villalba, Ricardo Szejner, P. LeQuesne, Carlos Vanstone, Jessica |
author_sort |
Muñoz, Ariel A. |
title |
Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records |
title_short |
Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records |
title_full |
Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records |
title_fullStr |
Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records |
title_full_unstemmed |
Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records |
title_sort |
streamflow variability in the chilean temperate-mediterranean climate transition (35°s–42°s) during the last 400 years inferred from tree-ring records |
publisher |
Springer |
url |
http://hdl.handle.net/11336/182683 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs00382-016-3068-9# info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-016-3068-9 http://hdl.handle.net/11336/182683 Muñoz, Ariel A.; González Reyes, Alvaro; Lara, Antonio; Sauchyn, David; Christie, Duncan; et al.; Streamflow variability in the Chilean Temperate-Mediterranean climate transition (35°S–42°S) during the last 400 years inferred from tree-ring records; Springer; Climate Dynamics; 47; 12; 3-2016; 4051-4066 0930-7575 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1007/s00382-016-3068-9 |
container_title |
Climate Dynamics |
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47 |
container_issue |
12 |
container_start_page |
4051 |
op_container_end_page |
4066 |
_version_ |
1779309961354936320 |