Authors: Johnsen, Sigfús J.; Hansen, Steffen Bo; Sheldon, Simon G.; Dahl-Jensen, Dorthe; Steffensen, Jørgen P.; Augustin, Laurent; Journé, Paul; Alemany, Olivier; Rufli, Henry; Schwander, Jakob; Azuma, Nobuhiko; Motoyama, Hideaki; Popp, Trevor; Talalay, Pavel; Thorsteinsson, Thorsteinn; Wilhelms, Frank; Zagorodnov, Victor

Source: Annals of Glaciology, Volume 47, Number 1, December 2007 , pp. 89-98(10)

Publisher: International Glaciological Society

Abstract:

In the mid-1990s, excellent results from the GRIP and GISP2 deep drilling projects in Greenland opened up funding for continued ice-coring efforts in Antarctica (EPICA) and Greenland (NorthGRIP). The Glaciology Group of the Niels Bohr Institute, University of Copenhagen, was assigned the task of providing drilling capability for these projects, as it had done for the GRIP project. The group decided to further simplify existing deep drill designs for better reliability and ease of handling. The drill design decided upon was successfully tested on Hans Tausen Ice Cap, Peary Land, Greenland, in 1995. The 5.0 m long Hans Tausen (HT) drill was a prototype for the ∼11 m long EPICA and NorthGRIP versions of the drill which were mechanically identical to the HT drill except for a much longer core barrel and chips chamber. These drills could deliver up to 4 m long ice cores after some design improvements had been introduced. The Berkner Island (Antarctica) drill is also an extended HT drill capable of drilling 2 m long cores. The success of the mechanical design of the HT drill is manifested by over 12 km of good-quality ice cores drilled by the HT drill and its derivatives since 1995.

Document Type: Research article

DOI: http://dx.doi.org/10.3189/172756407786857686

Publication date: 2007-12-01

More about this publication?

• The Annals of Glaciology is a peer-reviewed, thematic journal published 2 to 4 times a year by the International Glaciological Society (IGS). Publication frequency is determined and volume/issue numbers assigned by the IGS Council on a year-to-year basis and with a lead time of 3 to 4 years. The Annals of Glaciology is included in the ISI Science Citation Index from volume 50, number 50 onwards.

  Themes can be on any aspect of the study of snow and ice. Individual members can make a suggestion for a theme for an Annals issue to the Secretary General, who will forward it to the IGS Publications Committee. The IGS Publication Committee will make a recommendation for an individual themed Annals issue, together with a potential Annals Chief Editor for that issue, to IGS Council. The IGS Council will make the decision whether to proceed, taking into account the spread of topics and the overall capacity for publication of pages in Annals.

• Editorial Board
• Information for Authors
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Geology ,  Meteorology & Climatology
• By this author: Johnsen, Sigfús J. ;  Hansen, Steffen Bo ;  Sheldon, Simon G. ;  Dahl-Jensen, Dorthe ;  Steffensen, Jørgen P. ;  Augustin, Laurent ;  Journé, Paul ;  Alemany, Olivier ;  Rufli, Henry ;  Schwander, Jakob ;  Azuma, Nobuhiko ;  Motoyama, Hideaki ;  Popp, Trevor ;  Talalay, Pavel ;  Thorsteinsson, Thorsteinn ;  Wilhelms, Frank ;  Zagorodnov, Victor

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers