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@ARTICLE{Kastner:11662,
author = {Kastner, S. and Enters, D. and Ohlendorf, C. and
Haberzettl, T. and Kuhn, G. and Lücke, A. and Mayr, C. and
Reyss, J.-L. and Wastegard, S. and Zolitschka, B.},
title = {{R}econstructing 2000 years of hydrological variation
derived from laminated proglacial sediments of {L}ago del
{D}esierto at the eastern margin of the {S}outh {P}atagonian
{I}cefield, {A}rgentina},
journal = {Global and planetary change},
volume = {72},
issn = {0921-8181},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-11662},
pages = {201 - 214},
year = {2010},
note = {We would like to thank the SALSA scientific team for the
fieldwork at Lago del Desierto in March 2005. Sabine Stahl
and Benjamin Bunning are acknowledged for assistance with
sampling and geochemical analyses. Thomas Frederichs and
Christian Hilgenfeld (Department of Marine Geophysics,
University of Bremen) kindly enabled magnetic susceptibility
measurements. Tephra samples were analysed by courtesy of
Peter Abbott (University of Swansea). For assistance during
XRF-scanning, we thank Rita Frohlking (AWI Bremerhaven). The
coring was conducted as a pilot study during a field trip in
the framework of the DEKLIM project "South Argentinean Lake
Sediment Archives and modelling" (SALSA, grants 01 LD 0034
and 0035) founded by the German Federal Ministry of
Education and Research (BMBF). We appreciate the critical
review of the manuscript and the helpful comments of
Nathalie Fagel.},
abstract = {Lago del Desierto (49 degrees 02'S, 72 degrees 51'W) is
situated in the climatically sensitive area of Southern
Patagonia close to the Hielo Patagonico Sur (HPS or South
Patagonian Ice Field, Argentina). Next to marine records and
Antarctic ice cores, this continental area is important to
reveal hemispheric and global climate trends. As
instrumental climate records from this region are generally
short and scarce, environmental archives are the only source
of long-term records of climate variations. In this study,
the potential of laminated proglacial sediments from Lago
del Desierto as a palaeoclimate archive is evaluated. Two
parallel gravity cores (max. length 283 cm) were analysed
using a multi-proxy approach. Radiometric dating (C-14,
Pb-210 and Cs-137) and tephrochronology document that the
sediment cover the last 2000 years. Especially in the middle
part of the record, numerous turbidites make climate
variations difficult to decipher. However, after exclusion
of event layers changes in sedimentological, mineralogical,
and geochemical parameters reveal a long-term trend of
runoff variations and sediment accessibility controlled by
changes in temperature and precipitation. An abrupt
transition in sediment composition occurred around AD 850
and is interpreted as a change in sediment availability
related to the initial exposure of formerly glaciated areas
in the catchment. This striking change mirrors the onset of
warmer climate conditions during the Medieval Climate
Anomaly. Moreover, the Little Ice Age cooling and the
subsequent 20th century warming can be traced in the
sediment record corresponding to an overall trend observed
for southern South America. The proglacial lacustrine
sediment record of Lago del Desierto thus constitutes a link
between glacier studies of the HPS and other terrestrial
climate archives in a region were long, and continuous
climate records are still rare. (C) 2010 Elsevier B.V. All
rights reserved.},
keywords = {J (WoSType)},
cin = {ICG-4},
ddc = {550},
cid = {I:(DE-Juel1)VDB793},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Geography, Physical / Geosciences, Multidisciplinary},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000280040300011},
doi = {10.1016/j.gloplacha.2010.04.007},
url = {https://juser.fz-juelich.de/record/11662},
}