A 130 ka reconstruction of rainfall from the Bolivian Altiplano
New efforts to link climate reconstructions from shoreline deposits and sediment cores yield an improved and more detailed lake history from the Bolivian Altiplano. On the Southern Altiplano, 10 lake oscillations have been identified from this new unified chronology, each coincident with North Atlan...
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ftjamescook:oai:researchonline.jcu.edu.au:24701 2024-02-11T10:06:32+01:00 A 130 ka reconstruction of rainfall from the Bolivian Altiplano Placzek, C.J. Quade, J. Patchett, P.J. 2013 application/pdf https://researchonline.jcu.edu.au/24701/1/24701_Placzek_et_al_2013.pdf unknown Elsevier http://dx.doi.org/10.1016/j.epsl.2012.12.017 https://researchonline.jcu.edu.au/24701/ https://researchonline.jcu.edu.au/24701/1/24701_Placzek_et_al_2013.pdf Placzek, C.J., Quade, J., and Patchett, P.J. (2013) A 130 ka reconstruction of rainfall from the Bolivian Altiplano. Earth and Planetary Science Letters, 363. pp. 97-108. restricted Article PeerReviewed 2013 ftjamescook https://doi.org/10.1016/j.epsl.2012.12.017 2024-01-22T23:29:51Z New efforts to link climate reconstructions from shoreline deposits and sediment cores yield an improved and more detailed lake history from the Bolivian Altiplano. On the Southern Altiplano, 10 lake oscillations have been identified from this new unified chronology, each coincident with North Atlantic cold events such as Heinrich Events H5, H2, H1, and the Younger Dryas. By coupling this new lake history to a hydrologic budget model we are able to evaluate precipitation variability on the Southern Bolivian Altiplano over the last 130 ka. These modeling efforts underscore the relative aridity of the Altiplano during the rare and small lake cycles occurring between 80 and 20 ka, when colder temperatures combined with little or no change in rainfall produced smaller paleolakes. Relative aridity between 80 and 20 ka contrasts with the immense Tauca lake cycle (18.1–14.1 ka), which was six times larger than modern Lake Titicaca and coincided with Heinrich Event 1. This improved paleolake record from the Southern Altiplano reveals a strong link between central Andean climate and Atlantic sea-surface temperature gradients during the late Pleistocene, even though today rainfall variability is driven mostly by Pacific sea-surface temperature anomalies associated with El Niño/Southern Oscillation. However, not all Heinrich Events appear to result in lake expansions, most conspicuously during the global cold interval between 80 and 20 ka when the Altiplano and Amazon Basin were relatively arid. Article in Journal/Newspaper North Atlantic James Cook University, Australia: ResearchOnline@JCU New Lake ENVELOPE(-109.468,-109.468,62.684,62.684) Pacific The Altiplano ENVELOPE(163.917,163.917,-78.133,-78.133) Earth and Planetary Science Letters 363 97 108 |
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Open Polar |
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James Cook University, Australia: ResearchOnline@JCU |
op_collection_id |
ftjamescook |
language |
unknown |
description |
New efforts to link climate reconstructions from shoreline deposits and sediment cores yield an improved and more detailed lake history from the Bolivian Altiplano. On the Southern Altiplano, 10 lake oscillations have been identified from this new unified chronology, each coincident with North Atlantic cold events such as Heinrich Events H5, H2, H1, and the Younger Dryas. By coupling this new lake history to a hydrologic budget model we are able to evaluate precipitation variability on the Southern Bolivian Altiplano over the last 130 ka. These modeling efforts underscore the relative aridity of the Altiplano during the rare and small lake cycles occurring between 80 and 20 ka, when colder temperatures combined with little or no change in rainfall produced smaller paleolakes. Relative aridity between 80 and 20 ka contrasts with the immense Tauca lake cycle (18.1–14.1 ka), which was six times larger than modern Lake Titicaca and coincided with Heinrich Event 1. This improved paleolake record from the Southern Altiplano reveals a strong link between central Andean climate and Atlantic sea-surface temperature gradients during the late Pleistocene, even though today rainfall variability is driven mostly by Pacific sea-surface temperature anomalies associated with El Niño/Southern Oscillation. However, not all Heinrich Events appear to result in lake expansions, most conspicuously during the global cold interval between 80 and 20 ka when the Altiplano and Amazon Basin were relatively arid. |
format |
Article in Journal/Newspaper |
author |
Placzek, C.J. Quade, J. Patchett, P.J. |
spellingShingle |
Placzek, C.J. Quade, J. Patchett, P.J. A 130 ka reconstruction of rainfall from the Bolivian Altiplano |
author_facet |
Placzek, C.J. Quade, J. Patchett, P.J. |
author_sort |
Placzek, C.J. |
title |
A 130 ka reconstruction of rainfall from the Bolivian Altiplano |
title_short |
A 130 ka reconstruction of rainfall from the Bolivian Altiplano |
title_full |
A 130 ka reconstruction of rainfall from the Bolivian Altiplano |
title_fullStr |
A 130 ka reconstruction of rainfall from the Bolivian Altiplano |
title_full_unstemmed |
A 130 ka reconstruction of rainfall from the Bolivian Altiplano |
title_sort |
130 ka reconstruction of rainfall from the bolivian altiplano |
publisher |
Elsevier |
publishDate |
2013 |
url |
https://researchonline.jcu.edu.au/24701/1/24701_Placzek_et_al_2013.pdf |
long_lat |
ENVELOPE(-109.468,-109.468,62.684,62.684) ENVELOPE(163.917,163.917,-78.133,-78.133) |
geographic |
New Lake Pacific The Altiplano |
geographic_facet |
New Lake Pacific The Altiplano |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
http://dx.doi.org/10.1016/j.epsl.2012.12.017 https://researchonline.jcu.edu.au/24701/ https://researchonline.jcu.edu.au/24701/1/24701_Placzek_et_al_2013.pdf Placzek, C.J., Quade, J., and Patchett, P.J. (2013) A 130 ka reconstruction of rainfall from the Bolivian Altiplano. Earth and Planetary Science Letters, 363. pp. 97-108. |
op_rights |
restricted |
op_doi |
https://doi.org/10.1016/j.epsl.2012.12.017 |
container_title |
Earth and Planetary Science Letters |
container_volume |
363 |
container_start_page |
97 |
op_container_end_page |
108 |
_version_ |
1790604305597726720 |