Environment and climate of the last 51,000 years – new insights from the Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO)

Zolitschka, B.; Anselmetti, Flavio; Ariztegui, D.; Corbella, H.; Francus, P.; Lücke, A.; Maidana, N.I.; Ohlendorf, C.; Schäbitz, F.; Wastegård, S. (2013). Environment and climate of the last 51,000 years – new insights from the Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO). Quaternary Science Reviews, 71, pp. 1-12. Pergamon 10.1016/j.quascirev.2012.11.024

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In this introductory paper we summarize the history and achievements of the Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO), an interdisciplinary project embedded in the International Continental Scientific Drilling Program (ICDP). The stringent multiproxy approach adopted in this research combined with radiocarbon and luminescence dating provided the opportunity to synthesize a large body of hydrologically relevant data from Laguna Potrok Aike (southern Patagonia, Argentina). At this site, lake level was high from 51 ka until the early Holocene when the Southern Hemisphere Westerlies (SHW) were located further to the north. At 9.3 ka cal. BP the SHW moved southward and over the latitude of the study area (52 degrees S) causing a pronounced negative water balance with a lake level decrease of more than 50 m. Two millennia later, the SHW diminished in intensity and lake level rose to a subsequent maximum during the Little Ice Age. Since the 20th century, a strengthening of the SHW increased the evaporative stress resulting in a more negative water balance. A comparison of our data with other hydrological fluctuations at a regional scale in south-eastern Patagonia, provides new insights and also calls for better chronologies and high-resolution records of climate variability.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences
08 Faculty of Science > Institute of Geological Sciences > Quaternary Geology

UniBE Contributor:

Anselmetti, Flavio

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

0277-3791

Publisher:

Pergamon

Language:

English

Submitter:

Flavio Anselmetti

Date Deposited:

08 Aug 2014 17:06

Last Modified:

10 Sep 2015 09:03

Publisher DOI:

10.1016/j.quascirev.2012.11.024

BORIS DOI:

10.7892/boris.45560

URI:

https://boris.unibe.ch/id/eprint/45560

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