Late Quaternary environmental history of Taylor Valley,

ISBN-13: 9783838113579 / Angielski / Miękka / 2010 / 112 str.

Sabrina Ortlepp

Opis

In the unglaciated areas of Antarctica, lake sediments act as archives of the regional environmental and climatic history. In most cases, the records are restricted to the Holocene. Amongst the few exceptions are lakes in the McMurdo Dry Valleys, southern Victoria Land, which are known to have remained mostly ice-free during the Last Glacial Maximum. Within the scope of an U.S.-American-German expedition in austral summer 2002/2003, several sediment cores were recovered from three major lakes in the Taylor Valley: lakes Fryxell, Hoare, and Bonney. In order to reconstruct the late Quaternary regional environmental and climate history, sedimentological, biogeochemical, mineralogical, and chronological investigations were conducted on the sediment sequences recovered from Lake Hoare (core Lz1020) and East Lake Bonney (core Lz1023) within the scope of this thesis. This study shows that the investigated lake sediment records provide crucial information about the late Quaternary environmental history of Taylor Valley, but should be interpreted in context with ice core records, terrestrial, and marine archives for a better understanding of the regional paleoenvironment, and paleoclimate.

O autorze

November 2005 Juli 2009: Doktorandin (Geologie, Paläontologie) in einem DFG-Projekt im Schwerpunktprogramm Antarktisforschung ; November 2005 Oktober 2008: wissenschaftliche Mitarbeiterin an der Universität Leipzig und an der Universität zu Köln; Oktober 1999 März 2005: Geographie-Studium an der Friedrich-Schiller-Universität Jena