Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Seesedimente"”.
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Kopplung zwischen Oberflächengewässer und Grundwasser: Modellierung und Analyse von Umwelttracern
… hingegen für die hydraulische Leitfähigkeit der Seesedimente sowie für räumliche Heterogenitäten im k_f-Wert des Grundwasserleitermaterials festgestellt werden. Die Simulationen mit heterogenem Durchlässigkeitsbeiwert ergaben einen in seiner Höhe stark variablen Grundwasserzustrom zum …
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Lake-level fluctuations and Late Quaternary climate change in the Central Kenya Rift
… Möglichkeiten der Klimarekonstruktion anhand von Seesedimenten diskutiert. Es zeigt sich, dass die hoch gelegenen Seen des Zentralen Keniarifts, als Teil des Ostafrikanischen Grabensystems, besonders geeignete Klimaarchive darstellen, da sie sensibel auf klimatische Veränderungen reagieren. …
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Hydro- and biogeochemical investigations of lake sediments in the Kenyan Rift Valley
… Bedingungen in den darunterliegenden Seesedimenten bekannt ist, war es das Ziel dieser Arbeit, bereits existierende Datensätze mit Daten aus der Porenwasser- und Biomarker-Analyse zu erweitern. Zusätzlich wurden reduzierte Schwefelkomponenten und Sulfatreduktionsraten in den Sedimenten …
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Reconstructing climate from the Dead Sea sediment record using high-resolution micro-facies analyses
The sedimentary record of the Dead Sea is a key archive for reconstructing climate in the eastern Mediterranean region, as it stores the environmental and tectonic history of the Levant for the entire Quaternary. Moreover, the lake is located at the boundary between Mediterranean sub-humid to …
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A 7000 yr runoff chronology from varved sediments of Lake Mondsee (Upper Austria)
The potential increase in frequency and magnitude of extreme floods is currently discussed in terms of global warming and the intensification of the hydrological cycle. The profound knowledge of past natural variability of floods is of utmost importance in order to assess flood risk for the future. …
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Lateglacial to Holocene climatic and environmental changes in Europe : multi-proxy studies on lake sediments along a transect from northern Italy to northeastern Poland
Sediment records of three European lakes were investigated in order to reconstruct the regional climate development during the Lateglacial and Holocene, to investigate the response of local ecosystems to climatic fluctuations and human impact and to relate regional peculiarities of past climate …
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Extreme events in geoarchives
A main limitation in the field of flood hydrology is the short time period covered by instrumental flood time series, rarely exceeding more than 50 to 100 years. However, climate variability acts on short to millennial time scales and identifying causal linkages to extreme hydrological events …
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Holocene climate and environmental variability in NE Germany inferred from annually laminated lake sediments
Understanding the role of natural climate variability under the pressure of human induced changes of climate and landscapes, is crucial to improve future projections and adaption strategies. This doctoral thesis aims to reconstruct Holocene climate and environmental changes in NE Germany based on …
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Late glacial to Holocene climate and vegetation changes on the Tibetan Plateau inferred from fossil pollen records in lacustrine sediments
The past climate in central Asia, and especially on the Tibetan Plateau (TP), is of great importance for an understanding of global climate processes and for predicting the future climate. As a major influence on the climate in this region, the Asian Summer Monsoon (ASM) and its evolutionary …
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Investigations on rainfall variability during the late Quaternary based on geochemical analyses of lake sediments from tropical and subtropical southern Africa
This thesis presents investigations on sediments from two African lakes which have been recording changes in their surrounding environmental and climate conditions since more than 200,000 years. Focus of this work is the time of the last Glacial and the Holocene (the last ~100,000 years before …