Holocene Lake-Level Fluctuations of Lake Aricota, Southern Peru

2001 ◽  
Vol 56 (2) ◽  
pp. 181-190 ◽  
Author(s):  
Christa Placzek ◽  
Jay Quade ◽  
Julio L. Betancourt
Keyword(s):  
Debris Flows ◽  
Lake Level ◽  
Late Holocene ◽  
Vascular Plant ◽  
Lake Titicaca ◽  
Lake Level Fluctuations ◽  
Lacustrine Deposits ◽  
Plant Remains ◽  
Holocene Record ◽  
High Lake Levels

AbstractLacustrine deposits exposed around Lake Aricota, Peru (17° 22′S), a 7.5-km2 lake dammed by debris flows, provide a middle to late Holocene record of lake-level fluctuations. Chronological context for shoreline deposits was obtained from radiocarbon dating of vascular plant remains and other datable material with minimal 14C reservoir effects (<350 yr). Diatomites associated with highstands several meters above the modern lake level indicate wet episodes. Maximum Holocene lake level was attained before 6100 14C yr B.P. and ended ∼2700 14C yr B.P. Moderately high lake levels occurred at 1700 and 1300 14C yr B.P. The highstand at Lake Aricota during the middle Holocene is coeval with a major lowstand at Lake Titicaca (16°S), which is only 130 km to the northeast and shares a similar climatology. Comparisons with other marine and terrestrial records highlight emerging contradictions over the nature of mid-Holocene climate in the central Andes.

Global Maps of Lake-Level Fluctuations since 30,000 yr B.P.

1979 ◽  
Vol 12 (1) ◽  
pp. 83-118 ◽  
Author(s):  
F. Alayne Street ◽  
A. T. Grove
Keyword(s):  
Lake Level ◽  
Ice Sheets ◽  
Literature Survey ◽  
Sea Surface ◽  
Lake Levels ◽  
Lake Level Fluctuations ◽  
Average Abundance ◽  
The Tropics ◽  
High Lake Levels ◽  
Precipitation And Temperature

This paper presents selected world maps of lake-level fluctuations since 30,000 yr B.P. These are based on a literature survey of 141 lake basins with radiocarbon-dated chronologies. The resulting patterns are subcontinental in scale and show orderly variations in space and time. They reflect substantial changes in continental precipitation, evaporation, and runoff, which are due to glacial/interglacial fluctuations in the atmospheric and oceanic circulations. In the tropics, high lake levels are essentially an interglacial or interstadial phenomenon, although there are important exceptions. Since extensive lakes during the Holocene corresponded with relatively high sea-surface temperatures, and therefore presumably with high evaporation rates on land, they are interpreted as the result of higher precipitation. Tropical aridity culminated in most areas at, or just after, the glacial maximum, although the present day is also characterized by a below-average abundance of surface water. In extratropical regions the mapped patterns are more complex. They vary markedly with latitude and proximity to major ice sheets. In these areas, evidence is at present insufficient to evaluate the relative contributions of precipitation and temperature to the observed lake-level record.

scholarly journals Late Holocene lake-level fluctuations in Walker Lake, Nevada, USA

2006 ◽  
Vol 240 (3-4) ◽  
pp. 497-507 ◽  
Author(s):  
Fasong Yuan ◽  
Braddock K. Linsley ◽  
Stephen S. Howe ◽  
Steve P. Lund ◽  
John P. McGeehin
Keyword(s):  
Lake Level ◽  
Late Holocene ◽  
Walker Lake ◽  
Lake Level Fluctuations

scholarly journals Late-Holocene climatic variability south of the Alps as recorded by lake-level fluctuations at Lake Ledro, Trentino, Italy

The Holocene ◽  
2009 ◽  
Vol 19 (4) ◽  
pp. 575-589 ◽  
Author(s):  
Michel Magny ◽  
Didier Galop ◽  
Paolo Bellintani ◽  
Marc Desmet ◽  
Julien Didier ◽  
...  
Keyword(s):  
Lake Level ◽  
Late Holocene ◽  
Climatic Variability ◽  
Lake Level Fluctuations ◽  
The Alps

A ~6000 yr diatom record of mid- to late Holocene fluctuations in the level of Lago Wiñaymarca, Lake Titicaca (Peru/Bolivia)

2017 ◽  
Vol 88 (2) ◽  
pp. 179-192 ◽  
Author(s):  
D. Marie Weide ◽  
Sherilyn C. Fritz ◽  
Christine A. Hastorf ◽  
Maria C. Bruno ◽  
Paul A. Baker ◽  
...  
Keyword(s):  
Shallow Lake ◽  
Lake Level ◽  
Late Holocene ◽  
Species Abundance ◽  
Freshwater Species ◽  
Diatom Species ◽  
Deep Lake ◽  
Lake Titicaca ◽  
Southern Basin ◽  
Species Abundance Data

AbstractA multidecadal-scale lake-level reconstruction for Lago Wiñaymarca, the southern basin of Lake Titicaca, has been generated from diatom species abundance data. These data suggest that ~6500 cal yr BP Lago Wiñaymarca was dry, as indicated by a sediment unconformity. At ~4400 cal yr BP, the basin began to fill, as indicated by the dominance of shallow epiphytic species. It remained somewhat saline with extensive wetlands and abundant aquatic plants until ~3800 cal yr BP, when epiphytic species were replaced by planktic saline-indifferent species, suggesting a saline shallow lake. Wiñaymarca remained a relatively shallow lake that fluctuated on a multidecadal scale until ~1250 cal yr BP, when freshwater planktic species increased, suggesting a rise in lake level with a concomitant decrease in salinity. The lake became gradually fresher, dominated by deep, freshwater species from ~850 cal yr BP. By ~80 cal yr BP, saline-tolerant species were rare, and the lake was dominated by freshwater planktic diatoms, resembling the fresh and deep lake of today. These results reveal a more dynamic and chronologically specific record of lake-level fluctuations and associated ecological conditions that provide important new data for paleoclimatologists and archaeologists, to better understand human-environmental dynamics during the mid- to late Holocene.

Late Holocene palaeohydrology of lake Afourgagh (Middle-Atlas, Morocco) from deposit geometry and facies

2008 ◽  
Vol 179 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Sebastien Detriche ◽  
Jean-Gabriel Breheret ◽  
Hamid Zarki ◽  
L’houcine Karrat ◽  
Jean-Jacques Macaire ◽  
...  
Keyword(s):  
Human Activities ◽  
Lake Level ◽  
Late Holocene ◽  
Regional Scale ◽  
Climatic Impact ◽  
Lake Level Fluctuations ◽  
Middle Atlas ◽  
Two Phases

AbstractThe geometry and facies of deposits in lake Afourgagh (Middle-Atlas, Morocco) provide evidence for successive major lake level fluctuations during the last 2,500 years. Sedimentation is mainly biogenic with the laying down of thick charophyte-rich tufas interbedded with silty layers in distal areas and palaeosols in proximal areas. These alternations point to four major deposit sequences with lowstand phases. The first two phases are dated at ca. 2426 and 1869 cal B.P. These events appear to be linked to major arid episodes on a regional scale. However, climatic impact has been modulated by human activities, particularly during recent decades.

scholarly journals Isotopic tracers of paleohydrologic change in large lakes of the Bolivian Altiplano

2011 ◽  
Vol 75 (1) ◽  
pp. 231-244 ◽  
Author(s):  
Christa J. Placzek ◽  
Jay Quade ◽  
P. Jonathan Patchett
Keyword(s):  
Lake Level ◽  
Late Quaternary ◽  
Regional Variability ◽  
Large Lakes ◽  
Data Set ◽  
Isotopic Tracers ◽  
Lake Titicaca ◽  
Lake Level Fluctuations ◽  
Lake System ◽  
Bolivian Altiplano

AbstractWe have developed an 87Sr/86Sr, 234U/238U, and δ18O data set from carbonates associated with late Quaternary paleolake cycles on the southern Bolivian Altiplano as a tool for tracking and understanding the causes of lake-level fluctuations. Distinctive groupings of 87Sr/86Sr ratios are observed. Ratios are highest for the Ouki lake cycle (120–95 ka) at 0.70932, lowest for Coipasa lake cycle (12.8–11.4 ka) at 0.70853, and intermediate at 0.70881 to 0.70884 for the Salinas (95–80 ka), Inca Huasi (~ 45 ka), Sajsi (24–20.5 ka), and Tauca (18.1–14.1 ka) lake cycles. These Sr ratios reflect variable contributions from the eastern and western Cordilleras. The Laca hydrologic divide exerts a primary influence on modern and paleolake 87Sr/86Sr ratios; waters show higher 87Sr/86Sr ratios north of this divide. Most lake cycles were sustained by slightly more rainfall north of this divide but with minimal input from Lake Titicaca. The Coipasa lake cycle appears to have been sustained mainly by rainfall south of this divide. In contrast, the Ouki lake cycle was an expansive lake, deepest in the northern (Poópo) basin, and spilling southward. These results indicate that regional variability in central Andean wet events can be reconstructed using geochemical patterns from this lake system.

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