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@ARTICLE{Oehlerich:203173,
      author       = {Oehlerich, M. and Mayr, C. and Gussone, N. and Hahn, A. and
                      Hölzl, S. and Lücke, A. and Ohlendorf, C. and Rummel, S.
                      and Teichert, B. M. A. and Zolitschka, B.},
      title        = {{L}ateglacial and {H}olocene climatic changes in
                      south-eastern {P}atagonia inferred from carbonate isotope
                      records of {L}aguna {P}otrok {A}ike ({A}rgentina)},
      journal      = {Quaternary science reviews},
      volume       = {114},
      issn         = {0277-3791},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2015-05178},
      pages        = {189 - 202},
      year         = {2015},
      abstract     = {First results of strontium, calcium, carbon and oxygen
                      isotope analyses of bulk carbonates from a 106 m long
                      sediment record of Laguna Potrok Aike, located in southern
                      Patagonia are presented. Morphological and isotopic
                      investigations of μm-sized carbonate crystals in the
                      sediment reveal an endogenic origin for the entire Holocene.
                      During this time period the calcium carbonate record of
                      Laguna Potrok Aike turned out to be most likely
                      ikaite-derived. As ikaite precipitation in nature has only
                      been observed in a narrow temperature window between 0 and 7
                      °C, the respective carbonate oxygen isotope ratios serve as
                      a proxy of hydrological variations rather than of
                      palaeotemperatures. We suggest that oxygen isotope ratios
                      are sensitive to changes of the lake water balance induced
                      by intensity variations of the Southern Hemisphere
                      Westerlies and discuss the role of this wind belt as a
                      driver for climate change in southern South America. In
                      combination with other proxy records the evolution of
                      westerly wind intensities is reconstructed. Our data suggest
                      that weak SHW prevailed during the Lateglacial and the early
                      Holocene, interrupted by an interval with strengthened
                      Westerlies between 13.4 and 11.3 ka cal BP. Wind strength
                      increased at 9.2 ka cal BP and significantly intensified
                      until 7.0 ka cal BP. Subsequently, the wind intensity
                      diminished and stabilised to conditions similar to present
                      day after a period of reduced evaporation during the
                      “Little Ice Age”. Strontium isotopes (87Sr/86Sr ratio)
                      were identified as a potential lake-level indicator and
                      point to a lowering from overflow conditions during the
                      Glacial (∼17 ka cal BP) to lowest lake levels around 8 ka
                      cal BP. Thereafter the strontium isotope curve resembles the
                      lake-level curve which is stepwise rising until the
                      “Little Ice Age”. The variability of the Ca isotope
                      composition of the sediment reflects changes in the Ca
                      budget of the lake, indicating higher degrees of Ca
                      utilisation during the period with lowest lake level.},
      cin          = {IBG-3},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000353090000014},
      doi          = {10.1016/j.quascirev.2015.02.006},
      url          = {https://juser.fz-juelich.de/record/203173},
}