Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America

Sherilyn C. Fritz, Paul A. Baker, Tim K. Lowenstein, Geoffrey O. Seltzer, Catherine A. Rigsby, Gary S. Dwyer, Pedro M. Tapia, Kimberly K. Arnold, Teh Lung Ku, Shangde Luo

Research output: Contribution to journalArticle

131 Citations (Scopus)

Abstract

Despite the hypothesized importance of the tropics in the global climate system, few tropical paleoclimatic records extend to periods earlier than the last glacial maximum (LGM), about 20,000 years before present. We present a well-dated 170,000-year time series of hydrologic variation from the southern hemisphere tropics of South America that extends from modern times through most of the penultimate glacial period. Alternating mud and salt units in a core from Salar de Uyuni, Bolivia reflect alternations between wet and dry periods. The most striking feature of the sequence is that the duration of paleolakes increased in the late Quaternary. This change may reflect increased precipitation, geomorphic or tectonic processes that affected basin hydrology, or some combination of both. The dominance of salt between 170,000 and 140,000 yr ago indicates that much of the penultimate glacial period was dry, in contrast to wet conditions in the LGM. Our analyses also suggest that the relative influence of insolation forcing on regional moisture budgets may have been stronger during the past 50,000 years than in earlier times.

Original languageEnglish
Pages (from-to)95-104
Number of pages10
JournalQuaternary Research
Volume61
Issue number1
DOIs
Publication statusPublished - 2004 Jan

Fingerprint

Last Glacial Maximum
Southern Hemisphere
salt
insolation
global climate
hydrology
mud
moisture
time series
tectonics
basin
South America
tropics
Hemisphere
Salt
Tropics
budget
Modern Times
Tropical
Tectonics

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Earth-Surface Processes
  • Earth and Planetary Sciences(all)

Cite this

Fritz, S. C., Baker, P. A., Lowenstein, T. K., Seltzer, G. O., Rigsby, C. A., Dwyer, G. S., ... Luo, S. (2004). Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America. Quaternary Research, 61(1), 95-104. https://doi.org/10.1016/j.yqres.2003.08.007
Fritz, Sherilyn C. ; Baker, Paul A. ; Lowenstein, Tim K. ; Seltzer, Geoffrey O. ; Rigsby, Catherine A. ; Dwyer, Gary S. ; Tapia, Pedro M. ; Arnold, Kimberly K. ; Ku, Teh Lung ; Luo, Shangde. / Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America. In: Quaternary Research. 2004 ; Vol. 61, No. 1. pp. 95-104.
@article{5051a5eb14dd411999af3b775777ec08,
title = "Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America",
abstract = "Despite the hypothesized importance of the tropics in the global climate system, few tropical paleoclimatic records extend to periods earlier than the last glacial maximum (LGM), about 20,000 years before present. We present a well-dated 170,000-year time series of hydrologic variation from the southern hemisphere tropics of South America that extends from modern times through most of the penultimate glacial period. Alternating mud and salt units in a core from Salar de Uyuni, Bolivia reflect alternations between wet and dry periods. The most striking feature of the sequence is that the duration of paleolakes increased in the late Quaternary. This change may reflect increased precipitation, geomorphic or tectonic processes that affected basin hydrology, or some combination of both. The dominance of salt between 170,000 and 140,000 yr ago indicates that much of the penultimate glacial period was dry, in contrast to wet conditions in the LGM. Our analyses also suggest that the relative influence of insolation forcing on regional moisture budgets may have been stronger during the past 50,000 years than in earlier times.",
author = "Fritz, {Sherilyn C.} and Baker, {Paul A.} and Lowenstein, {Tim K.} and Seltzer, {Geoffrey O.} and Rigsby, {Catherine A.} and Dwyer, {Gary S.} and Tapia, {Pedro M.} and Arnold, {Kimberly K.} and Ku, {Teh Lung} and Shangde Luo",
year = "2004",
month = "1",
doi = "10.1016/j.yqres.2003.08.007",
language = "English",
volume = "61",
pages = "95--104",
journal = "Quaternary Research",
issn = "0033-5894",
publisher = "Academic Press Inc.",
number = "1",

}

Fritz, SC, Baker, PA, Lowenstein, TK, Seltzer, GO, Rigsby, CA, Dwyer, GS, Tapia, PM, Arnold, KK, Ku, TL & Luo, S 2004, 'Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America', Quaternary Research, vol. 61, no. 1, pp. 95-104. https://doi.org/10.1016/j.yqres.2003.08.007

Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America. / Fritz, Sherilyn C.; Baker, Paul A.; Lowenstein, Tim K.; Seltzer, Geoffrey O.; Rigsby, Catherine A.; Dwyer, Gary S.; Tapia, Pedro M.; Arnold, Kimberly K.; Ku, Teh Lung; Luo, Shangde.

In: Quaternary Research, Vol. 61, No. 1, 01.2004, p. 95-104.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Hydrologic variation during the last 170,000 years in the southern hemisphere tropics of South America

AU - Fritz, Sherilyn C.

AU - Baker, Paul A.

AU - Lowenstein, Tim K.

AU - Seltzer, Geoffrey O.

AU - Rigsby, Catherine A.

AU - Dwyer, Gary S.

AU - Tapia, Pedro M.

AU - Arnold, Kimberly K.

AU - Ku, Teh Lung

AU - Luo, Shangde

PY - 2004/1

Y1 - 2004/1

N2 - Despite the hypothesized importance of the tropics in the global climate system, few tropical paleoclimatic records extend to periods earlier than the last glacial maximum (LGM), about 20,000 years before present. We present a well-dated 170,000-year time series of hydrologic variation from the southern hemisphere tropics of South America that extends from modern times through most of the penultimate glacial period. Alternating mud and salt units in a core from Salar de Uyuni, Bolivia reflect alternations between wet and dry periods. The most striking feature of the sequence is that the duration of paleolakes increased in the late Quaternary. This change may reflect increased precipitation, geomorphic or tectonic processes that affected basin hydrology, or some combination of both. The dominance of salt between 170,000 and 140,000 yr ago indicates that much of the penultimate glacial period was dry, in contrast to wet conditions in the LGM. Our analyses also suggest that the relative influence of insolation forcing on regional moisture budgets may have been stronger during the past 50,000 years than in earlier times.

AB - Despite the hypothesized importance of the tropics in the global climate system, few tropical paleoclimatic records extend to periods earlier than the last glacial maximum (LGM), about 20,000 years before present. We present a well-dated 170,000-year time series of hydrologic variation from the southern hemisphere tropics of South America that extends from modern times through most of the penultimate glacial period. Alternating mud and salt units in a core from Salar de Uyuni, Bolivia reflect alternations between wet and dry periods. The most striking feature of the sequence is that the duration of paleolakes increased in the late Quaternary. This change may reflect increased precipitation, geomorphic or tectonic processes that affected basin hydrology, or some combination of both. The dominance of salt between 170,000 and 140,000 yr ago indicates that much of the penultimate glacial period was dry, in contrast to wet conditions in the LGM. Our analyses also suggest that the relative influence of insolation forcing on regional moisture budgets may have been stronger during the past 50,000 years than in earlier times.

UR - http://www.scopus.com/inward/record.url?scp=1542347883&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1542347883&partnerID=8YFLogxK

U2 - 10.1016/j.yqres.2003.08.007

DO - 10.1016/j.yqres.2003.08.007

M3 - Article

AN - SCOPUS:1542347883

VL - 61

SP - 95

EP - 104

JO - Quaternary Research

JF - Quaternary Research

SN - 0033-5894

IS - 1

ER -