The BE-OI Coordination and Support Action (CSA, BE-OI Phase I) was characterised by three intense field season with surveys both within the Dome C region as well as Dronning Maud Land / Dome Fuji region. The performed high-resolution geophysical reconnaissance has led to the successful identification of a suitable drill site in the vicinity of Dome C, where old ice is expected to be found with high confidence. According to all information gained within BE-OI to date, following mandatory glaciological criteria are fulfilled at this site:
• Old and relatively stable ice sheet
• Low accumulation rate
• Low horizontal velocity
• Low basal melting
• Sufficient layer thickness at depth
Beside the selection of the optimal drill side, the consortium overcame the following obstacles in preparation of BE-OI drilling phase:
- Ensure financial support:
o The BE-OI consortium applied for further EU funding and received 11 Mio € EU contribution to carry out the drilling phase (project “Beyond EPICA Oldest Ice Core”, duration 1st June 2019 – 31st May 2025, GA-No. 815385) under the lead of the Italian institute CNR
o Furthermore, all involved nations committed themselves to support the drilling phase by providing infrastructure and other resources
- Ensure logistical support: Any field work has to take into account the constraints due to remoteness, harsh conditions, environmental regulations and energy supply within Antarctica. The selection of the drill side near the French/Italian Concordia Station allows use of its regular operation and transport system and infrastructure, which is run by the project partners IPEV and ENEA. Both committed support to the drilling phase and a detailed logistic plan could be developed.
- Getting the drill equipment ready: extracting a nearly 3 km long ice core from Antarctica requires advanced technology, which will be provided by AWI, UCPHand CNRS. All three organisations have tremendous experiences in deep ice core drilling from previous projects in Antarctica and Greenland. A collection of all equipment will be used during the drilling phase and was tested during BE-OI for compatibility and subsequently improved.
- Develop a science plan: the oldest ice contains precious information to be unravelled by various analytical methods. After consultations with scientists from various fields, a detailed science plan was developed and will be continuously adapted during the drilling phase Beyond EPICA.
The BE-OI consortium organised numerous workshops (internal and with invited experts) and two outreach events (townhall event during POLAR 2018 and session at EGU 2019) to consult with other science communities and nations.
Furthermore, nine peer reviewed publications describing the major outcomes of the project towards the selection of the drill site were so far published during the first reporting period:
# 1: “Geothermal heat flux and basal melt rate in the Dome C region inferred from radar reflectivity and thermal modelling” by Olivier Passalacqua and others in "The Cryosphere" doi: 10.5194/tc-2017-23
# 2: “Is there 1.5 million-year old ice near Dome C, Antarctica?” by Frédéric Parrenin and others in "The Cryosphere" doi: 10.5194/tc-2017-69
# 3: “Accumulation patterns around Dome C, East Antarctica, in the last 73 kyrs” by Marie G.P. Cavitte and others in "The Cryosphere" doi: 10.5194/tc-12-1401-2018
# 4: “Brief communication: "Oldest Ice" patches diagnosed 37 km southwest of Dome C, East Antarctica” by Olivier Passalacqua and others in "The Cryosphere" doi: 10.5194/tc-2018-19
# 5: “Glaciological characteristics in the Dome Fuji region and new assessment for 1.5 Ma old ice” by Nanna Karlsson and others in "The Cryosphere" doi: 10.5194/tc-2017-258
# 6: Promising Oldest Ice sites in East Antarctica based on thermodynamical modelling by Brice Van Liefferinge and others in "The Cryosphere" doi: 10.5194/tc-2017-276
# 7: Modelling the Antarctic Ice Sheet across the Mid Pleistocene Transition – Implications for Oldest Ice by Johannes Sutter and others in "The Cryosphere" doi: 10.5194/tc-2019-24
# 8: Age stratigraphy in the East Antarctic Ice Sheet inferred from radio echo sounding horizons by Anna Winter and other in ESSD doi: 10.5194/essd-2018-140
# 9: UHF Radar Sounding of Polar Ice Sheets by Jie-Bang Yan and other in IEEE doi: 10.1109/LGRS.2019.2942582
