Description: Das Projekt "High-resolution climate reconstruction for phases of Holocene rapid climate change from lakes in Northern Europe: Assessing the potential of high-resolution non-destructive scanning techniques" wird vom Umweltbundesamt gefördert und von Universität Bern, Geographisches Institut, Gruppe für Klimatologie,Meteorologie durchgeführt. This project had two main goals: i) to test and further develop the novel method of scanning reflectance spectroscopy in the visible spectrum (VIS-RS) and ii) to gain improved insight into Holocene climate, especially into phases with rapid climate change by applying this method to sediments from lakes in Northern Europe. In a first study, we could confirm the high potential of VIS-RS for inferring for example organic content of lake sediments. We could as well demonstrate the high potential of multivariate calibration techniques for this purpose. In a next step it should be tested to which extend more time consuming and costly sediment parameters can be inferred by means of VIS-RS. In a second study, we analysed a comprehensive data set from a pro-glacial lake in Western Norway and extracted a signal of Holocene glacier variations from this data set. Focusing on the 8.2 ka event a period characterised by rapid cooling and subsequent warming in the North Atlantic realm, we find that the decomposition of the glacier happened even faster than the glacier advance. In this study, we applied a multitude of statistical methods to i) compare sediment parameters among each other, ii) to extract signals common to all sediment parameters and iii) to transform uncertainty of age-depth models into uncertainties of glacial activity. We therefore employed methods that are widely applied in palaeoecology but that have not found their way into the field of geochemistry and sedimentology yet.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Norwegen ? Paläoökologie ? Seen ? Geochemie ? Kalibrierung ? Klimatologie ? Meteorologie ? Seensediment ? Skigebiet ? Brunnen ? Main ? Gletscher ? Spektralanalyse ? Nordeuropa ? Ackerland ? Kühlung ? Numerisches Verfahren ? Reflexion ? Studie ? Technik ? Sediment ? Verwitterung ? Lebensalter ? Glühverlust ? Wertermittlung ? Europa ? Nordatlantik ? Kenngröße ? Klima ? Klimawandel ? Spektrum ? Änderung ? BEISPIEL ? HOLOZAEN ? Holozän ? METHODE ? NEU ? NOERDLICH ? POTENZIAL ? PROJEKT ? SEDIMENTOLOGIE ? SONSTIG ? STATISTISCH ? See [Binnengewässer] ? UMGESTALTUNG ? UNTERSUCHUNG ? VERGLEICHEN ? Vorgang ? ZEITRAEUME ? ZWECKBESTIMMUNG ? reflectance spectroscopy ? BEWERTEN ? DATENSATZ ? DAUER ? FORTSCHRITTLICH ? ANGEWANDT ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2010-09-01 - 2012-02-29
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