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Lake-level variability in Salar de Coipasa, Bolivia during the past ∼40,000 yr

Nunnery, J. Andrew ; Fritz, Sherilyn C. LU ; Baker, Paul A. and Salenbien, Wout (2019) In Quaternary Research 91(2). p.829-847
Abstract


Various paleoclimatic records have been used to reconstruct the hydrologic history of the Altiplano, relating this history to past variability of the South American summer monsoon. Prior studies of the southern Altiplano, the location of the world's largest salt flat, the Salar de Uyuni, and its neighbor, the Salar de Coipasa, generally agree in their reconstructions of the climate history of the past ∼24 ka. Some studies, however, have highly divergent climatic records and interpretations of earlier periods. In this study, lake-level variation was reconstructed from a ∼14-m-long sediment core from the Salar de Coipasa. These sediments span the last ∼40 ka. Lacustrine... (More)


Various paleoclimatic records have been used to reconstruct the hydrologic history of the Altiplano, relating this history to past variability of the South American summer monsoon. Prior studies of the southern Altiplano, the location of the world's largest salt flat, the Salar de Uyuni, and its neighbor, the Salar de Coipasa, generally agree in their reconstructions of the climate history of the past ∼24 ka. Some studies, however, have highly divergent climatic records and interpretations of earlier periods. In this study, lake-level variation was reconstructed from a ∼14-m-long sediment core from the Salar de Coipasa. These sediments span the last ∼40 ka. Lacustrine sediment accumulation was apparently continuous in the basin from ∼40 to 6 ka, with dry or very shallow conditions afterward. The fossil diatom stratigraphy and geochemical data (δ
13
C, δ
15
N, %Ca, C/N) indicate fluctuations in lake level from shallow to moderately deep, with the deepest conditions correlative with the Heinrich-1 and Younger Dryas events. The stratigraphy shows a continuous lake of variable depth and salinity during the last glacial maximum and latter stages of Marine Oxygen Isotope Stage 3 and is consistent with environmental inferences and the original chronology of a drill core from Salar de Uyuni.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Altiplano, Andes, Paleoclimate, Paleohydrology, Paleolake, South America
in
Quaternary Research
volume
91
issue
2
pages
19 pages
publisher
Academic Press
external identifiers
  • scopus:85063950278
ISSN
0033-5894
DOI
10.1017/qua.2018.108
language
English
LU publication?
yes
id
39e50353-5a6f-43d3-a248-602e914f5c18
date added to LUP
2019-04-26 13:41:50
date last changed
2022-04-25 22:40:44
@article{39e50353-5a6f-43d3-a248-602e914f5c18,
  abstract     = {{<p><br>
                                                         Various paleoclimatic records have been used to reconstruct the hydrologic history of the Altiplano, relating this history to past variability of the South American summer monsoon. Prior studies of the southern Altiplano, the location of the world's largest salt flat, the Salar de Uyuni, and its neighbor, the Salar de Coipasa, generally agree in their reconstructions of the climate history of the past ∼24 ka. Some studies, however, have highly divergent climatic records and interpretations of earlier periods. In this study, lake-level variation was reconstructed from a ∼14-m-long sediment core from the Salar de Coipasa. These sediments span the last ∼40 ka. Lacustrine sediment accumulation was apparently continuous in the basin from ∼40 to 6 ka, with dry or very shallow conditions afterward. The fossil diatom stratigraphy and geochemical data (δ                             <br>
                            <sup>13</sup><br>
                                                         C, δ                             <br>
                            <sup>15</sup><br>
                                                         N, %Ca, C/N) indicate fluctuations in lake level from shallow to moderately deep, with the deepest conditions correlative with the Heinrich-1 and Younger Dryas events. The stratigraphy shows a continuous lake of variable depth and salinity during the last glacial maximum and latter stages of Marine Oxygen Isotope Stage 3 and is consistent with environmental inferences and the original chronology of a drill core from Salar de Uyuni.                         <br>
                        </p>}},
  author       = {{Nunnery, J. Andrew and Fritz, Sherilyn C. and Baker, Paul A. and Salenbien, Wout}},
  issn         = {{0033-5894}},
  keywords     = {{Altiplano; Andes; Paleoclimate; Paleohydrology; Paleolake; South America}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{829--847}},
  publisher    = {{Academic Press}},
  series       = {{Quaternary Research}},
  title        = {{Lake-level variability in Salar de Coipasa, Bolivia during the past ∼40,000 yr}},
  url          = {{http://dx.doi.org/10.1017/qua.2018.108}},
  doi          = {{10.1017/qua.2018.108}},
  volume       = {{91}},
  year         = {{2019}},
}