Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale
The Southern Westerly Winds (SWW) are the surface expression of geostrophic winds that encircle the southern mid-latitudes. In conjunction with the Southern Ocean, they establish a coupled system that not only controls climate in the southern third of the world, but is also closely connected to the...
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ftconicet:oai:ri.conicet.gov.ar:11336/93935 2023-10-09T21:47:15+02:00 Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale Moreno, P.I. Vilanova, Isabel Villa-Martínez, R. Dunbar, R.B. Mucciarone, D.A. Kaplan, M.R. Garreaud, R.D. Rojas, M. Moy, C.M. De Pol-Holz, R. Lambert, F. application/pdf http://hdl.handle.net/11336/93935 eng eng Nature Publishing Group info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41598-018-21836-6 info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-018-21836-6 http://hdl.handle.net/11336/93935 Moreno, P.I.; Vilanova, Isabel; Villa-Martínez, R.; Dunbar, R.B.; Mucciarone, D.A.; et al.; Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale; Nature Publishing Group; Scientific Reports; 8; 1; 2-2018; 1-9 2045-2322 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ PATAGONIA SOUTHERN WESTERLY WINDS SOUTHERN ANNULAR MODE LAKE SEDIMENT RECORD 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/10.1038/s41598-018-21836-6 2023-09-24T20:21:00Z The Southern Westerly Winds (SWW) are the surface expression of geostrophic winds that encircle the southern mid-latitudes. In conjunction with the Southern Ocean, they establish a coupled system that not only controls climate in the southern third of the world, but is also closely connected to the position of the Intertropical Convergence Zone and CO2 degassing from the deep ocean. Paradoxically, little is known about their behavior since the last ice age and relationships with mid-latitude glacier history and tropical climate variability. Here we present a lake sediment record from Chilean Patagonia (51°S) that reveals fluctuations of the low-level SWW at mid-latitudes, including strong westerlies during the Antarctic Cold Reversal, anomalously low intensity during the early Holocene, which was unfavorable for glacier growth, and strong SWW since ∼7.5 ka. We detect nine positive Southern Annular Mode-like events at centennial timescale since ∼5.8 ka that alternate with cold/wet intervals favorable for glacier expansions (Neoglaciations) in southern Patagonia. The correspondence of key features of mid-latitude atmospheric circulation with shifts in tropical climate since ∼10 ka suggests that coherent climatic shifts in these regions have driven climate change in vast sectors of the Southern Hemisphere at centennial and millennial timescales. Fil: Moreno, P.I. Universidad de Chile; Chile Fil: Vilanova, Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina Fil: Villa-Martínez, R. Universidad de Magallanes; Chile Fil: Dunbar, R.B. University of Stanford; Estados Unidos Fil: Mucciarone, D.A. University of Stanford; Estados Unidos Fil: Kaplan, M.R. Columbia University; Estados Unidos Fil: Garreaud, R.D. Universidad de Chile; Chile Fil: Rojas, M. Universidad de Chile; Chile Fil: Moy, C.M. University of Otago; Nueva Zelanda Fil: De Pol-Holz, R. Universidad ... Article in Journal/Newspaper Antarc* Antarctic Southern Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Southern Ocean The Antarctic Patagonia Argentino Argentina Moreno ENVELOPE(-62.300,-62.300,-64.083,-64.083) Magallanes ENVELOPE(-62.933,-62.933,-64.883,-64.883) Martínez ENVELOPE(-62.183,-62.183,-64.650,-64.650) Dunbar ENVELOPE(-60.199,-60.199,-62.473,-62.473) Rojas ENVELOPE(-63.950,-63.950,-64.817,-64.817) Scientific Reports 8 1 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
PATAGONIA SOUTHERN WESTERLY WINDS SOUTHERN ANNULAR MODE LAKE SEDIMENT RECORD https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
PATAGONIA SOUTHERN WESTERLY WINDS SOUTHERN ANNULAR MODE LAKE SEDIMENT RECORD https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Moreno, P.I. Vilanova, Isabel Villa-Martínez, R. Dunbar, R.B. Mucciarone, D.A. Kaplan, M.R. Garreaud, R.D. Rojas, M. Moy, C.M. De Pol-Holz, R. Lambert, F. Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale |
topic_facet |
PATAGONIA SOUTHERN WESTERLY WINDS SOUTHERN ANNULAR MODE LAKE SEDIMENT RECORD https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The Southern Westerly Winds (SWW) are the surface expression of geostrophic winds that encircle the southern mid-latitudes. In conjunction with the Southern Ocean, they establish a coupled system that not only controls climate in the southern third of the world, but is also closely connected to the position of the Intertropical Convergence Zone and CO2 degassing from the deep ocean. Paradoxically, little is known about their behavior since the last ice age and relationships with mid-latitude glacier history and tropical climate variability. Here we present a lake sediment record from Chilean Patagonia (51°S) that reveals fluctuations of the low-level SWW at mid-latitudes, including strong westerlies during the Antarctic Cold Reversal, anomalously low intensity during the early Holocene, which was unfavorable for glacier growth, and strong SWW since ∼7.5 ka. We detect nine positive Southern Annular Mode-like events at centennial timescale since ∼5.8 ka that alternate with cold/wet intervals favorable for glacier expansions (Neoglaciations) in southern Patagonia. The correspondence of key features of mid-latitude atmospheric circulation with shifts in tropical climate since ∼10 ka suggests that coherent climatic shifts in these regions have driven climate change in vast sectors of the Southern Hemisphere at centennial and millennial timescales. Fil: Moreno, P.I. Universidad de Chile; Chile Fil: Vilanova, Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina Fil: Villa-Martínez, R. Universidad de Magallanes; Chile Fil: Dunbar, R.B. University of Stanford; Estados Unidos Fil: Mucciarone, D.A. University of Stanford; Estados Unidos Fil: Kaplan, M.R. Columbia University; Estados Unidos Fil: Garreaud, R.D. Universidad de Chile; Chile Fil: Rojas, M. Universidad de Chile; Chile Fil: Moy, C.M. University of Otago; Nueva Zelanda Fil: De Pol-Holz, R. Universidad ... |
format |
Article in Journal/Newspaper |
author |
Moreno, P.I. Vilanova, Isabel Villa-Martínez, R. Dunbar, R.B. Mucciarone, D.A. Kaplan, M.R. Garreaud, R.D. Rojas, M. Moy, C.M. De Pol-Holz, R. Lambert, F. |
author_facet |
Moreno, P.I. Vilanova, Isabel Villa-Martínez, R. Dunbar, R.B. Mucciarone, D.A. Kaplan, M.R. Garreaud, R.D. Rojas, M. Moy, C.M. De Pol-Holz, R. Lambert, F. |
author_sort |
Moreno, P.I. |
title |
Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale |
title_short |
Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale |
title_full |
Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale |
title_fullStr |
Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale |
title_full_unstemmed |
Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale |
title_sort |
onset and evolution of southern annular mode-like changes at centennial timescale |
publisher |
Nature Publishing Group |
url |
http://hdl.handle.net/11336/93935 |
long_lat |
ENVELOPE(-62.300,-62.300,-64.083,-64.083) ENVELOPE(-62.933,-62.933,-64.883,-64.883) ENVELOPE(-62.183,-62.183,-64.650,-64.650) ENVELOPE(-60.199,-60.199,-62.473,-62.473) ENVELOPE(-63.950,-63.950,-64.817,-64.817) |
geographic |
Antarctic Southern Ocean The Antarctic Patagonia Argentino Argentina Moreno Magallanes Martínez Dunbar Rojas |
geographic_facet |
Antarctic Southern Ocean The Antarctic Patagonia Argentino Argentina Moreno Magallanes Martínez Dunbar Rojas |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/url/http://www.nature.com/articles/s41598-018-21836-6 info:eu-repo/semantics/altIdentifier/doi/10.1038/s41598-018-21836-6 http://hdl.handle.net/11336/93935 Moreno, P.I.; Vilanova, Isabel; Villa-Martínez, R.; Dunbar, R.B.; Mucciarone, D.A.; et al.; Onset and Evolution of Southern Annular Mode-Like Changes at Centennial Timescale; Nature Publishing Group; Scientific Reports; 8; 1; 2-2018; 1-9 2045-2322 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1038/s41598-018-21836-6 |
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Scientific Reports |
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1779310221150126080 |