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@ARTICLE{Kastner:11908,
author = {Kastner, S. and Ohlendorf, C. and Haberzettl, T. and
Lücke, A. and Mayr, C. and Maidana, N.I. and Schäbitz, F.
and Zolitschka, B.},
title = {{S}outhern hemispheric westerlies control the spatial
distribution of modern sediments in {L}aguna {P}otrok
{A}ike, {A}rgentina},
journal = {Journal of paleolimnology},
volume = {44},
issn = {0921-2728},
address = {Dordrecht [u.a.]},
publisher = {Springer Science + Business Media B.V},
reportid = {PreJuSER-11908},
pages = {887 - 902},
year = {2010},
note = {We thank all the members of the SALSA and PASADO teams who
helped during coring in 2005 and 2008. We thank Sabine
Stahl, Benjamin Bunning, Yvonne Bronnimann, Melanie Roos and
Jost Schumski for help with sampling, sample preparation and
geochemical analyses at the GEOPOLAR laboratory, University
of Bremen. We are grateful to Eva Hering (University of
Cologne) for providing pollen data from her diploma thesis
and Thomas Chwalek (University of Munich, LMU) for isotope
data from his bachelor thesis. We are much obliged to Bernd
Wagner and Martin Grosjean who conscientiously improved the
manuscript with their critical reviews and suggestions. We
are also grateful to Mark Brenner for his detailed editorial
work. This is a contribution to the project ASADO (Analysis
of Sediment Areal Distribution in Laguna Potrok Aike)
founded by the German Research Foundation (DFG) within the
ICDP priority program (ZO 102/8-1,2) which contributes to
the ICDP deep drilling project PASADO.},
abstract = {We studied the internal lake processes that control the
spatial distribution and characteristics of modern sediments
at the ICDP (International Continental Scientific Drilling
Program) deep drilling site in Laguna Potrok Aike, southern
Patagonia, Argentina. Sediment distribution patterns were
investigated using a dense grid of 63 gravity cores taken
throughout the lake basin and 40 additional shoreline
samples. Analysis of the surficial sediment distribution
points to distinct internal depositional dynamics induced by
wind-driven lake internal currents. Distribution maps
illustrate that the spatial characteristics of analysed
variables are linked to high erosional wave activity.
Persistent wave action and littoral erosion along all
shores, especially the eastern shore, is caused by
prevailing Southern Hemispheric Westerlies. Several sediment
variables (grain size, benthic diatoms, total inorganic
carbon and calcium) indicate re-suspension of littoral
sediment followed by re-distribution to profundal
accumulation areas near the eastern shore. Variations within
the catchment influence sediment characteristics in the
north-eastern bay. That area is characterized by different
mineralogical and sedimentological conditions as well as
greater accumulation of pollen, inorganic carbon and
diatoms. These findings are related to the influence of
episodic inflow into this bay. Spatial differences in stable
isotope values throughout the lake suggest that ephemeral
tributaries around the lake basin may also contribute to the
detected spatial sediment variations.},
keywords = {J (WoSType)},
cin = {ICG-4},
ddc = {930},
cid = {I:(DE-Juel1)VDB793},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Environmental Sciences / Geosciences, Multidisciplinary /
Limnology},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000283360800001},
doi = {10.1007/s10933-010-9462-0},
url = {https://juser.fz-juelich.de/record/11908},
}