Lake-level stratigraphy and geochronology revisited at Lago (Lake) Cardiel, Argentina, and changes in the Southern Hemispheric Westerlies over the last 25 ka

Jay Quade, M. R. Kaplan

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Paleoshorelines around Lago (Lake) Cardiel in southern Argentina (S48.9°, W71.3° ∼275 m) record substantial changes in lake area over the past 25 ka. Our results combined with previous research show that during the last glacial maximum (or LGM, 23–21 ka), the lake stood at near modern levels, but had nearly dried up by ∼13 ka. Between 11.3 and 10.1 ka the lake reached its highest point (+54–58 m) and greatest extent in at least the last 40 ka. Lake levels dropped thereafter and experienced two lower-lake periods: 8.5–7.5 ka and 5–3.3 ka; and two higher-lake periods: 7.4–6 and ∼5.2 ka. In the last 3.5 ka, the lake has remained generally near or slightly above its present level. The depth and surface area of Lago Cardiel are controlled mainly by precipitation onto the lake and surrounding catchment, air and water temperature, and wind-speed related to local strength of the Southern Hemispheric Westerlies (SHW). Our lake-level reconstruction combined with evidence from other studies suggest that on average the core of the SHW was located well to the north (<45°S) of the Cardiel basin during the deep lake phase associated with the LGM, and was well to the south (>55°S?) during the hydrologic maximum of Cardiel in the early Holocene. The lower phases of the lake at 20.0–11.5, 8.5–7.5, and 5.0–3.3 ka generally correspond to cold conditions in other records, when we infer that the SHW were strongly focused around the latitudes of Cardiel at 49°S.

Original languageEnglish (US)
Pages (from-to)173-188
Number of pages16
JournalQuaternary Science Reviews
Volume177
DOIs
StatePublished - Dec 1 2017

Fingerprint

stratigraphy
lake level
geochronology
Argentina
lakes
lake
reconstruction
air
water
present
evidence
Water
Controlled
Cold
Geochronology
Early Holocene
Last Glacial Maximum
Temperature
Catchment
Stratigraphy

Keywords

  • Carbon-14 dating
  • Lakes
  • Paleoclimatology
  • Quaternary
  • South America
  • Tufa

ASJC Scopus subject areas

  • Global and Planetary Change
  • Ecology, Evolution, Behavior and Systematics
  • Archaeology
  • Archaeology
  • Geology

Cite this

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title = "Lake-level stratigraphy and geochronology revisited at Lago (Lake) Cardiel, Argentina, and changes in the Southern Hemispheric Westerlies over the last 25 ka",
abstract = "Paleoshorelines around Lago (Lake) Cardiel in southern Argentina (S48.9°, W71.3° ∼275 m) record substantial changes in lake area over the past 25 ka. Our results combined with previous research show that during the last glacial maximum (or LGM, 23–21 ka), the lake stood at near modern levels, but had nearly dried up by ∼13 ka. Between 11.3 and 10.1 ka the lake reached its highest point (+54–58 m) and greatest extent in at least the last 40 ka. Lake levels dropped thereafter and experienced two lower-lake periods: 8.5–7.5 ka and 5–3.3 ka; and two higher-lake periods: 7.4–6 and ∼5.2 ka. In the last 3.5 ka, the lake has remained generally near or slightly above its present level. The depth and surface area of Lago Cardiel are controlled mainly by precipitation onto the lake and surrounding catchment, air and water temperature, and wind-speed related to local strength of the Southern Hemispheric Westerlies (SHW). Our lake-level reconstruction combined with evidence from other studies suggest that on average the core of the SHW was located well to the north (<45°S) of the Cardiel basin during the deep lake phase associated with the LGM, and was well to the south (>55°S?) during the hydrologic maximum of Cardiel in the early Holocene. The lower phases of the lake at 20.0–11.5, 8.5–7.5, and 5.0–3.3 ka generally correspond to cold conditions in other records, when we infer that the SHW were strongly focused around the latitudes of Cardiel at 49°S.",
keywords = "Carbon-14 dating, Lakes, Paleoclimatology, Quaternary, South America, Tufa",
author = "Jay Quade and Kaplan, {M. R.}",
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TY - JOUR

T1 - Lake-level stratigraphy and geochronology revisited at Lago (Lake) Cardiel, Argentina, and changes in the Southern Hemispheric Westerlies over the last 25 ka

AU - Quade, Jay

AU - Kaplan, M. R.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Paleoshorelines around Lago (Lake) Cardiel in southern Argentina (S48.9°, W71.3° ∼275 m) record substantial changes in lake area over the past 25 ka. Our results combined with previous research show that during the last glacial maximum (or LGM, 23–21 ka), the lake stood at near modern levels, but had nearly dried up by ∼13 ka. Between 11.3 and 10.1 ka the lake reached its highest point (+54–58 m) and greatest extent in at least the last 40 ka. Lake levels dropped thereafter and experienced two lower-lake periods: 8.5–7.5 ka and 5–3.3 ka; and two higher-lake periods: 7.4–6 and ∼5.2 ka. In the last 3.5 ka, the lake has remained generally near or slightly above its present level. The depth and surface area of Lago Cardiel are controlled mainly by precipitation onto the lake and surrounding catchment, air and water temperature, and wind-speed related to local strength of the Southern Hemispheric Westerlies (SHW). Our lake-level reconstruction combined with evidence from other studies suggest that on average the core of the SHW was located well to the north (<45°S) of the Cardiel basin during the deep lake phase associated with the LGM, and was well to the south (>55°S?) during the hydrologic maximum of Cardiel in the early Holocene. The lower phases of the lake at 20.0–11.5, 8.5–7.5, and 5.0–3.3 ka generally correspond to cold conditions in other records, when we infer that the SHW were strongly focused around the latitudes of Cardiel at 49°S.

AB - Paleoshorelines around Lago (Lake) Cardiel in southern Argentina (S48.9°, W71.3° ∼275 m) record substantial changes in lake area over the past 25 ka. Our results combined with previous research show that during the last glacial maximum (or LGM, 23–21 ka), the lake stood at near modern levels, but had nearly dried up by ∼13 ka. Between 11.3 and 10.1 ka the lake reached its highest point (+54–58 m) and greatest extent in at least the last 40 ka. Lake levels dropped thereafter and experienced two lower-lake periods: 8.5–7.5 ka and 5–3.3 ka; and two higher-lake periods: 7.4–6 and ∼5.2 ka. In the last 3.5 ka, the lake has remained generally near or slightly above its present level. The depth and surface area of Lago Cardiel are controlled mainly by precipitation onto the lake and surrounding catchment, air and water temperature, and wind-speed related to local strength of the Southern Hemispheric Westerlies (SHW). Our lake-level reconstruction combined with evidence from other studies suggest that on average the core of the SHW was located well to the north (<45°S) of the Cardiel basin during the deep lake phase associated with the LGM, and was well to the south (>55°S?) during the hydrologic maximum of Cardiel in the early Holocene. The lower phases of the lake at 20.0–11.5, 8.5–7.5, and 5.0–3.3 ka generally correspond to cold conditions in other records, when we infer that the SHW were strongly focused around the latitudes of Cardiel at 49°S.

KW - Carbon-14 dating

KW - Lakes

KW - Paleoclimatology

KW - Quaternary

KW - South America

KW - Tufa

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VL - 177

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EP - 188

JO - Quaternary Science Reviews

JF - Quaternary Science Reviews

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