Environment and climate of the last 51,000 years – new insights from the Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO)
Environment and climate of the last 51,000 years – new insights from the Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO)
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DOI：
10.1016/j.quascirev.2012.11.024
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发表时间：
2013-07
影响因子：
4
通讯作者：
B. Zolitschka;F. Anselmetti;D. Arizteguí;H. Corbella;P. Francus;A. Lücke;N. Maidana;C. Ohlendorf;F. Schäbitz;S. Wastegård
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文献类型：
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作者：
B. Zolitschka;F. Anselmetti;D. Arizteguí;H. Corbella;P. Francus;A. Lücke;N. Maidana;C. Ohlendorf;F. Schäbitz;S. Wastegård
本文介绍了Potrok Aike maar湖沉积物档案钻探项目（PASADO）的历史和成就，该项目是国际大陆科学钻探计划（ICDP）的一个跨学科项目。在这项研究中采用的严格的多重代理方法结合放射性碳和发光测年提供了机会，以合成大量的水文相关数据从拉古纳Potrok艾克（巴塔哥尼亚南部，阿根廷）。在这个网站上，湖泊水位高，从51万年到全新世早期，当南半球西风（SHW）位于进一步向北。在9.3 ka cal.BP，SHW向南移动并越过研究区域的纬度（52°S），导致明显的负水平衡，湖平面下降超过50 m。2000年后，SHW的强度减弱，湖泊水位在小冰期期间上升到随后的最高点。自世纪以来，SHW的加强增加了蒸发应力，导致更负的水平衡。我们的数据与其他水文波动在巴塔哥尼亚东南部的区域范围内的比较，提供了新的见解，也要求更好的年表和高分辨率的气候变化记录。
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°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.