Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica ...

Four firn cores were retrieved in 2007 at two ridges in the area of the Ekström Ice Shelf, Dronning Maud Land, coastal East Antarctica, in order to investigate the recent regional climate variability and the potential for future extraction of an intermediate-depth core. Stable water-isotope analysis...

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Bibliographic Details
Main Authors: Fernandoy, Francisco, Meyer, Hanno, Oerter, Hans, Wilhelms, Frank, Graf, Wolfgang, Schwander, Jakob
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2010
Subjects:
Ice drill
Firn auger
Monitoring station
Pre-IPICS
ANT-XIX/2
Neumayer_based
Sampling/drilling ice
Polarstern
NEUMAYER III
European Project for Ice Coring in Antarctica EPICA
Glaciology @ AWI AWI_Glac
Antarc*
Antarctica
Dronning Maud Land
East Antarctica
EPICA
Ice Shelf
Online Access:https://dx.doi.org/10.1594/pangaea.753185
https://doi.pangaea.de/10.1594/PANGAEA.753185
Description
Summary:Four firn cores were retrieved in 2007 at two ridges in the area of the Ekström Ice Shelf, Dronning Maud Land, coastal East Antarctica, in order to investigate the recent regional climate variability and the potential for future extraction of an intermediate-depth core. Stable water-isotope analysis, tritium content and electrical conductivity were used to date the cores. For the period 1981-2006 a strong and significant correlation between the stable-isotope composition of firn cores in the hinterland and mean monthly air temperatures at Neumayer station was (r=0.54-0.71). No atmospheric warming or cooling trend is inferred from our stable-isotope data for the period 1962-2006. The stable-isotope record of the ice/firn cores could expand well beyond the meteorological record of the region. No significant temporal variation of accumulation rates was detected. However, decreasing accumulation rates were found from coast to hinterland, as well as from east (Halvfarryggen) to west (Søråsen). The deuterium ... : Supplement to: Fernandoy, Francisco; Meyer, Hanno; Oerter, Hans; Wilhelms, Frank; Graf, Wolfgang; Schwander, Jakob (2010): Temporal and Spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica. Journal of Glaciology, 56(198), 673-687 ...

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