Description: Das Projekt "East Antarctic Ice Sheet dynamics during the late Quaternary inferred from marine sediment records of the Indian sector of the Southern Ocean" wird vom Umweltbundesamt gefördert und von Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung e.V. in der Helmholtz-Gemeinschaft (AWI) durchgeführt. The major objective of the project is the reconstruction of late Quaternary East Antarctic Ice Sheet Dynamics, inferred from sedimentary records that document environmental changes in the glaciomarine realm between the southern Kerguelen Plateau and the Prydz Bay with the outlet of the Lambert Glacier-Amery Ice Shelf system. The latter represents one of the three large ice shelves of Antarctica. It is fed by eight major ice streams, draining a vast glacial catchment area (1.09 million km2), representing about 20Prozent of the EAIS. The idea and scientific conception of the project is to recognize the variability of processes in the proximal and distal marine environment that are linked with ice-sheet dynamics, comprising the input of ice-rafted debris, glacial reworking of shelf sediments to the continental slope, the variability of bottom-water production and outflow under floating ice shelves, as well as changes in biological productivity controlled by marine ice coverage (see block diagram below). The sample material used for this project has been taken during Polarstern cruise ANT-XXIII/9 to the study area between 2nd February and 11th April 2007 . The sedimentary records comprise high-resolution Holocene sections, the time interval of the latest glacial-interglacial cycle during the past 130 kyr, and one long-term record back to the mid-Pliocene. First results suggest a persistent stability of the East Antarctic Ice Sheet through at least the Pleistocene, whereby glacial-interglacial fluctuations in global sea level controlled the extent of shelf-grounded ice sheets. The abundance of ice-rafted debris suggests maximum ice extension during the early Pleistocene and the mid-Pleistocene, supported by finding from terrestrial studies. High-frequent ice-sheet oscillations at sub-Milankovitch time scales, as known from the behaviour of northern-hemispheric ice sheets, are not recognizable in the glaciomarine sediment records. In the Prydz Bay region, the last postglacial ice-sheet retreat was accomplished around 8.8 ka BP with a short readvance during the mid-Holocene.
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Antarktischer Eisschild ? Stromverteilung ? Kontinentalschelf ? Meeressediment ? Resistenz ? Temperaturverteilung ? Brunnen ? Indien ? Wasserhyazinthe ? Eisschild ? Aerosol ? Bodenwasser ? Bucht ? Drehmaschine ? Energieversorgung ? Marines Ökosystem ? Partikelgrößenverteilung ? Topographie ? Korngrößenverteilung ? Antarktis ? Wasser ? Sedimentdynamik ? Abfall ? Bewässerung ? Demografie ? Einzugsgebiet ? Größenverteilung ? Meeresspiegel ? Schadstoffausbreitung ? Studie ? Trennverfahren ? Vertikalprofil ? Wasserspeicher ? Sediment ? Erschütterung ? Meeresgewässer ? Produktion ? Abdeckung ? Schifffahrt ? Klimawandel ? Bebauung ? Umweltveränderung ? Persistenz ? Produktivität ? Wiederaufarbeitung ? Zirkulation ? Fahrradfahren ? Regionale Verteilung ? Ressource ? Gebiet ? Hang ? Globale Aspekte ? Abfall ? Fluss ? Südlicher Ozean ? Entwässerung ? Ozean ? ein- ? fördern ? Bereich ? sedimentär ? Isoplethe ? Konzept ? unter ? Kostenverteilung ? Pleistozän ? Temperaturerhöhung ? Einkommensverteilung ? Ergebnis ? wissenschaftlich ? Ablagerung ? Holozän ? Probe ? Internationale Verteilung ? Intertemporale Verteilung ? größt ? Verarbeiten ? Verhalten ? Wiederaufbereitung ? Zeitverteilung ? nördlich ? Projekt ? biologisch ? Quartär [Erdzeitalter] ? Altstoff ?
Region: Bremen
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2007-01-01 - 2009-12-31
Webseite zum Förderprojekt
http://www.spp-antarktisforschung.de/ (Webseite)Accessed 1 times.