Universität zu Köln

Kastner, Stephanie ORCID: 0000-0001-5850-658X, Ohlendorf, Christian, Haberzettl, Torsten ORCID: 0000-0002-6975-9774, Luecke, Andreas, Mayr, Christoph ORCID: 0000-0001-9002-9963, Maidana, Nora I., Schaebitz, Frank and Zolitschka, Bernd ORCID: 0000-0001-8256-0420 (2010). Southern hemispheric westerlies control the spatial distribution of modern sediments in Laguna Potrok Aike, Argentina. J. Paleolimn., 44 (4). S. 887 - 903. DORDRECHT: SPRINGER. ISSN 1573-0417

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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.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kastner, Stephanie UNSPECIFIED orcid.org/0000-0001-5850-658X UNSPECIFIED Ohlendorf, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Haberzettl, Torsten UNSPECIFIED orcid.org/0000-0002-6975-9774 UNSPECIFIED Luecke, Andreas UNSPECIFIED UNSPECIFIED UNSPECIFIED Mayr, Christoph UNSPECIFIED orcid.org/0000-0001-9002-9963 UNSPECIFIED Maidana, Nora I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaebitz, Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Zolitschka, Bernd UNSPECIFIED orcid.org/0000-0001-8256-0420 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-491760
DOI:	10.1007/s10933-010-9462-0
Journal or Publication Title:	J. Paleolimn.
Volume:	44
Number:	4
Page Range:	S. 887 - 903
Date:	2010
Publisher:	SPRINGER
Place of Publication:	DORDRECHT
ISSN:	1573-0417
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ORGANIC-MATTER; LAKE-SEDIMENTS; VOLCANIC FIELD; SANTA-CRUZ; PATAGONIA; DYNAMICS; CLIMATE; RECONSTRUCTIONS; RESUSPENSION; STRATIGRAPHY Multiple languages Environmental Sciences; Geosciences, Multidisciplinary; Limnology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49176