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    Design, transport, construction, and operation of the summer base Kohnen for ice-core drilling in Dronning Maud Land, Antarctica. (2002)
    Memoirs of National Institute of Polar Research, Special Issue Vol 56, Ed. by Nobuhiko Azuma and Yoshiyuki Fujii.
    In:  EPIC3Ice drilling technology 2000 : Proceedings of the fifth International Workshop on Ice Drilling Technology, 30 October-1 November 2000, Nagaoka University of Technology, Nagaoka, Memoirs of National Institute of Polar Research, Special Issue Vol 56, Ed. by Nobuhiko Azuma and Yoshiyuki Fujii., pp. 302-312, ISSN: 0386-0744
    Details
    Publication Date: 2019-07-17
    Description: During the austral summer seasons 1999/2000 and 2000/2001 the summer base"Kohnen" was built as a platform for the EPICA deep ice core drilling in DronningMaud Land, Antarctica. The design is based on prefabricated container units. Thebase was erected within two summer seasons. Overland traverses with Pistenbullytractors and cargo sledges moved all needed material and base containers from theGerman base Neumayer at the Antarctic coast to the base Kohnen 750 km inland.All installations are completed at the end of the 2000/2001 season including thedrill and science trench with a cased 100-m borehole. Thus everything is preparedto start the deep drilling operation during the 2001/2002 austral summer season.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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  • 2
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    Antarctic temperature changes during the last millennium: evaluation of simulations and reconstructions (2012)
    Elsevier
    In:  EPIC3Quaternary Science Reviews, Elsevier, 55, pp. 75-90
    Details
    Publication Date: 2019-07-17
    Description: Temperature changes in Antarctica over the last millennium are investigated using proxy records, a set of simulations driven by natural and anthropogenic forcings and one simulation with data assimilation. Over Antarctica, a long term cooling trend in annual mean is simulated during the period 1000-1850. The main contributor to this cooling trend is the volcanic forcing, astronomical forcing playing a dominant role at seasonal timescale. Since 1850, all the models produce an Antarctic warming in response to the increase in greenhouse gas concentrations. We present a composite of Antarctic temperature, calculated by averaging seven temperature records derived from isotope measurements in ice cores. This simple approach is supported by the coherency displayed between model results at these data grid points and Antarctic mean temperature. The composite shows a weak multi-centennial cooling trend during the pre-industrial period and a warming after 1850 that is broadly consistent with model results. In both data and simulations, large regional variations are superimposed on this common signal, at decadal to centennial timescales. The model results appear spatially more consistent than ice core records. We conclude that more records are needed to resolve the complex spatial distribution of Antarctic temperature variations during the last millennium.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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