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

• 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

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 ...