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| Titel |
Neogene sea surface temperature reconstructions from the Southern McMurdo Sound and the McMurdo Ice Shelf (ANDRILL Program, Antarctica) |
| VerfasserIn |
Francesca Sangiorgi, Veronica Willmott, Jung-Hyun Kim, Stefan Schouten, Henk Brinkhuis, Jaap S. Sinninghe Damsté, Fabio Florindo, David Harwood, Tim Naish, Ross Powell |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250041103
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| Zusammenfassung |
| During the austral summers 2006 and 2007 the ANtarctic DRILLing Program (ANDRILL)
drilled two cores, each recovering more than 1000m of sediment from below the McMurdo
Ice-Shelf (MIS, AND-1B), and sea-ice in Southern McMurdo Sound (SMS, AND-2A),
respectively, revealing new information about Neogene Antarctic cryosphere evolution. Core
AND-1B was drilled in a more distal location than core AND-2A. With the aim of obtaining
important information for the understanding of the history of Antarctic climate and
environment during selected interval of the Neogene, we applied novel organic geochemistry
proxies such as TEX86 (Tetra Ether IndeX of lipids with 86 carbon atoms) using a new
calibration equation specifically developed for polar areas and based on 116 surface sediment
samples collected from polar oceans (Kim et al., subm.), and BIT (Branched and Isoprenoid
Tetraether), to derive absolute (sea surface) temperature values and to evaluate the relative
contribution of soil organic matter versus marine organic matter, respectively. We will
present the state-of-the-art of the methodology applied, discussing its advantages
and limitations, and the results so far obtained from the analysis of  60 samples
from core AND-2A covering the Miocene Climatic Optimum (and the Mid-late
Miocene transition) and of 20 pilot samples from core AND-1B covering the late
Pliocene. |
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