Lake highstands on the Altiplano (Tropical Andes) contemporaneous with Heinrich 1 and the Younger Dryas: new insights from 14C, U–Th dating and δ18O of carbonates

Blard, Pierre‐Henri; Sylvestre, Florence; Tripati, Aradhna; Claude, Christelle; Causse, Christiane; Coudrain, Anne; Condom, Thomas; Seidel, J.L.; Vimeux, Françoise; Moreau, C.; Dumoulin, Jean; Lavé, Jérôme

doi:10.1016/j.quascirev.2011.11.001

Cited by 87 publications

(151 citation statements)

References 56 publications

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“…However, one year is a relatively small interval of time to obtain a representative lapse rate. Moreover, paleolake transgressions on the Bolivian Altiplano (e.g., Blard et al [10] and Clayton et al [86]) show that the Arid Tropical Andes paleoclimate was moister than in the present, which would have implied a smaller ATLR. Therefore, to solve Equation (1), the temperature lapse rate from the International Standard Atmosphere (ATLR EARTH = 6.5 • C/km), suitable for the tropics [1], and the local value (ATLR2010 = 7.0 • C/km) were applied.…”

Section: Paleoclimate Coolingmentioning

confidence: 95%

“…A lot of evidence (e.g., [10,11]) suggests that, in the past, the climate in the Arid Tropical Andes was moister than in the present, which would have caused a lower ATLR. Thereupon, our cooling estimate using the global average ATLR EARTH (6.5 • C/km) appears more probable than the estimate reached using the current ATLR 2010 = 7.0 • C/km, which can be discarded.…”

Section: Paleoclimate Reconstructionsmentioning

confidence: 99%

“…This could have happened during the Last Glacial Maximum (LGM) understood as the minimum relative sea level (RSL;~26-19 ka ago; [102][103][104]). Likewise, even tens of thousands of years before the LGM, the ITCZ southward shift [13] and the paleolake transgressions on the Bolivian Altiplano [10,11] reveal a humid and favorable paleoclimate.…”

Section: The Glaciers Maximum Extension and The Polygenic Moraines Dementioning

confidence: 99%

“…(b) Secondly, the humidity increases due to cold boreal events, which is well recorded in the Andean Altiplano lacustrine evidence; e.g., -At the Coropuna latitude (~16 • S), one clear evidence of moister conditions is the strong decrease in the Titicaca salinity~21-10 ka ago, as shown by the great abundance (>80%) of freshwater plankton, nowadays extinct, in the lake sediments [113]. -Southward (17-22 • S), in the lake transgressions Sajsi (~25-19 ka); Tauca (~18-14 ka) and Coipasa (~11-13 ka; [10]). The wettest climate was at the Tauca highstand (17.0-15.7 ka).…”

Section: Paleoclimatic Frameworkmentioning

confidence: 99%

“…The maximum water depth of 120 m was registered in the center of the Uyuni basin, for a total lake surface of about 52.000 km 2 [8,10,114,115].…”

Section: Paleoclimatic Frameworkmentioning

confidence: 99%

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Prospecting Glacial Ages and Paleoclimatic Reconstructions Northeastward of Nevado Coropuna (16° S, 73° W, 6377 m), Arid Tropical Andes

et al. 2018

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This work investigates the timing, paleoclimatic framework and inter-hemispheric teleconnections inferred from the glaciers last maximum extension and the deglaciation onset in the Arid Tropical Andes. A study area was selected to the northeastward of the Nevado Coropuna, the volcano currently covered by the largest tropical glacier on Earth. The current glacier extent, the moraines deposited in the past and paleoglaciers at their maximum extension have been mapped. The present and past Equilibrium Line Altitudes (ELA and paleoELA) have been reconstructed and the chlorine-36 ages have been calculated, for preliminary absolute dating of glacial and volcanic processes. The paleoELA depression, the thermometers installed in the study area and the accumulation data previously published allowed development of paleotemperature and paleoprecipitation models. The Coropuna glaciers were in maximum extension (or glacial standstill) 20-12 ka ago (and maybe earlier). This last maximum extension was contemporary to the Heinrich 2-1 and Younger Dryas events and the Tauca and Coipasa paleolake transgressions on Bolivian Altiplano. The maximum paleoELA depression (991 m) shows a colder (−6.4 • C) and moister climate with precipitation ×1.2-×2.8 higher than the present. The deglaciation onset in the Arid Tropical Andes was 15-11 ka ago, earlier in the most southern, arid, and low mountains and later in the northernmost, less arid, and higher mountains.

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Section: Paleoclimate Coolingmentioning

confidence: 95%

Section: Paleoclimate Reconstructionsmentioning

confidence: 99%

Section: The Glaciers Maximum Extension and The Polygenic Moraines Dementioning

confidence: 99%

Section: Paleoclimatic Frameworkmentioning

confidence: 99%

“…The maximum water depth of 120 m was registered in the center of the Uyuni basin, for a total lake surface of about 52.000 km 2 [8,10,114,115].…”

Section: Paleoclimatic Frameworkmentioning

confidence: 99%

See 3 more Smart Citations

Prospecting Glacial Ages and Paleoclimatic Reconstructions Northeastward of Nevado Coropuna (16° S, 73° W, 6377 m), Arid Tropical Andes

et al. 2018

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The endemic gastropod fauna of Lake Titicaca: correlation between molecular evolution and hydrographic history

Kroll

Hershler

Albrecht

et al. 2012

Ecology and Evolution

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Lake Titicaca, situated in the Altiplano high plateau, is the only ancient lake in South America. This 2- to 3-My-old (where My is million years) water body has had a complex history that included at least five major hydrological phases during the Pleistocene. It is generally assumed that these physical events helped shape the evolutionary history of the lake's biota. Herein, we study an endemic species assemblage in Lake Titicaca, composed of members of the microgastropod genus Heleobia, to determine whether the lake has functioned as a reservoir of relic species or the site of local diversification, to evaluate congruence of the regional paleohydrology and the evolutionary history of this assemblage, and to assess whether the geographic distributions of endemic lineages are hierarchical. Our phylogenetic analyses indicate that the Titicaca/Altiplano Heleobia fauna (together with few extralimital taxa) forms a species flock. A molecular clock analysis suggests that the most recent common ancestor (MRCAs) of the Altiplano taxa evolved 0.53 (0.28–0.80) My ago and the MRCAs of the Altiplano taxa and their extralimital sister group 0.92 (0.46–1.52) My ago. The endemic species of Lake Titicaca are younger than the lake itself, implying primarily intralacustrine speciation. Moreover, the timing of evolutionary branching events and the ages of two precursors of Lake Titicaca, lakes Cabana and Ballivián, is congruent. Although Lake Titicaca appears to have been the principal site of speciation for the regional Heleobia fauna, the contemporary spatial patterns of endemism have been masked by immigration and/or emigration events of local riverine taxa, which we attribute to the unstable hydrographic history of the Altiplano. Thus, a hierarchical distribution of endemism is not evident, but instead there is a single genetic break between two regional clades. We also discuss our findings in relation to studies of other regional biota and suggest that salinity tolerance was the most likely limiting factor in the evolution of Altiplano species flocks.

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Relic Groundwater and Mega Drought Confound Interpretations of Water Sustainability and Lithium Extraction in Arid Lands

Moran

Boutt

McKnight

et al. 2022

Preprint

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Lake highstands on the Altiplano (Tropical Andes) contemporaneous with Heinrich 1 and the Younger Dryas: new insights from 14C, U–Th dating and δ18O of carbonates

Cited by 87 publications

References 56 publications

Prospecting Glacial Ages and Paleoclimatic Reconstructions Northeastward of Nevado Coropuna (16° S, 73° W, 6377 m), Arid Tropical Andes

Prospecting Glacial Ages and Paleoclimatic Reconstructions Northeastward of Nevado Coropuna (16° S, 73° W, 6377 m), Arid Tropical Andes

The endemic gastropod fauna of Lake Titicaca: correlation between molecular evolution and hydrographic history

Relic Groundwater and Mega Drought Confound Interpretations of Water Sustainability and Lithium Extraction in Arid Lands

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