30 September 2019 to 3 October 2019
The Royal Danish Academy of Sciences and Letters
Europe/Copenhagen timezone

Deep subglacial access: an assessment of past hot water drilling failures and recent successes

30 Sep 2019, 09:40
20m
The Royal Danish Academy of Sciences and Letters

The Royal Danish Academy of Sciences and Letters

The Royal Danish Academy of Sciences and Letters H.C. Andersens Boulevard 35 DK-1553 Copenhagen V Denmark
Oral Session 1

Speaker

Keith Makinson (British Antarctic Survey)

Description

Following the failed 2012 attempt to access Subglacial Lake Ellsworth in West Antarctica, using a specially designed hot water drill, a programme review was undertaken. An international board of experts assessed the reasons for the failure, and made recommendations on the modifications necessary to facilitate successful deep (>2 km) subglacial access using the technique of hot water drilling. The lessons learnt were substantial and over four Antarctic field seasons, various hot water drilling equipment and procedural modifications were tested and optimised, successfully delivering numerous access holes through Filchner-Ronne Ice Shelf. On January 8th, 2019, the culmination of this work was demonstrated on Rutford Ice Stream, West Antarctica, when the British Antarctic Survey led BEAMISH project successfully hot water drilled a 2152 m deep subglacial access hole, reaching the sediments beneath the ice stream. A further two holes, at different sites, were then drilled over the following 5 weeks. Here we discuss the points raised by the review board and present the advances required for recent successes and for the future research of subglacial lakes beneath thick continental ice sheets.

Primary author

Keith Makinson (British Antarctic Survey)

Co-author

Mr Paul Anker (British Antarctic Survey)

Presentation Materials

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