Description: Das Projekt "Schwerpunktprogramm (SPP) 1158: Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Bereich Infrastruktur - Antarktisforschung mit vergleichenden Untersuchungen in arktischen Eisgebieten, Glacial ice-sheet dynamics and retreat deduced from southeastern Weddell Sea sediment (LAMINAE)" wird/wurde gefördert durch: Deutsche Forschungsgemeinschaft. Es wird/wurde ausgeführt durch: Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung - Fachbereich Geowissenschaften.As part of research bundle RIDDLE (Reconstructing ice-sheet dynamics on different scales), the key goal of project LAMINAE is to provide detailed insight into glacial ice sheet dynamics in the southeastern Weddell Sea section of Antarctica. Ten existing sediment sites that preserved at least five millennia of varved sequences during the last glacial maximum (LGM) will be studied with a multi-proxy approach. First, the final retreat of the Antarctic Ice Sheet at the end of the LGM will be dated with 14C. The results will help to confine the timing of the initial sea-level rise for both the West and East Antarctic Ice Sheets, including potential asynchronies. Second, we will establish floating chronologies from new methods for laminae recognition and varve counting. Thereby, it will be possible to study glacial ice sheet dynamics at unprecedented resolution, including the role of decadal-centennial scale solar cycles in climate change, and the detection of Antarctic Isotopic Maxima in sites penetrating Marine Isotopic Stage 3. Third, with the combination of absolute and floating chronologies, we will define marker horizons in core sections that are rich in bioturbation, ice-rafted debris, or ash layers, for correlation between the sites and to the EDML ice core. This will put our results into a larger-scale perspective and allow for synchronization of the atmospheric and oceanic response to climate change.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Antarktischer Eisschild ? Asche ? Tracer ? Eisschild ? Arktisches Meereis ? Datierung ? Meeresspiegelanstieg ? Antarktis ? Arktis ? Meeresmüll ? Antarktisforschung ? Abfall ? Standortwahl ? Studie ? Sediment ? Meeresgewässer ? Sedimentdynamik ? Forschung ? Potenzial ? Bebauung ? Infrastruktur ? Klimawandel ? Chronologie ? Projekt ? Schicht ? Sequenzierung ? Verantwortung ? bestehend ? größt ? solar ? Ergebnis ? Konserve ? Perspektive ? Bereich ?
Region: Bremen
Bounding boxes: 8.83333° .. 8.83333° x 53.08333° .. 53.08333°
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2010-01-01 - 2016-12-31
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