1,1,- 1British Antarctic Survey, IDP, United Kingdom of Great Britain – England, Scotland, Wales (jacby@bas.ac.uk)
- *A full list of authors appears at the end of the abstract
We present an optimised impurities continuous-flow analysis (CFA) method specifically developed to analyse the Beyond EPICA Oldest Ice Core (BE-OIC; >700 ky bp). Hosted at the British Antarctic Survey (BAS1) and operated collaboratively with our BE-OI partners2-12, the new CFA method was designed to operate at a melt rate of 1.5 cm min-1. The system included the continuous analyses of trace elements (triple quadrupole inductively-coupled plasma mass spectrometry, Agilent 8900 ICP-QQQ-MS/MS & inductively-coupled plasma optical emission spectroscopy, Agilent 5900 ICP-OES; BAS1); major anions (Cl-, SO42-, NO3- and MSA, Dionex fast ion chromatography, FIC; BAS1); NH4+ (fluorometry; BAS1); electrolytic conductivity (Dionex CDM-1 & Amber Science ECM 3201; BAS1); insoluble particulate size distribution (Abakus Klotz laser diffraction spectrometry, and EOS Single Particle Extinction Scattering, SPES2; U. Bern2); and stable water isotopes (δ18O, δ2H; Picarro cavity ring-down spectrometry, CRDS; U. Bern2, BE-OI Isotope Consortium7-10,12). For the first time, we present sections of BE-OIC chemistry data, focusing on trace elements (ICP-QQQ-MS & ICP-OES) and major anions (FIC).
In addition, the CFA campaign provided discrete liquid samples for single-particle trace elemental analysis (U. Bern2), organic analysis (U. Cambridge3, Ca’ Foscari U. Venice9&CNR-ISP10), δ34S (U. St. Andrews5), diatoms (BAS1), halogens (Ca’ Foscari U. Venice9 & CNR-ISP10), and tephra (BAS1, U. St. Andrews5 & Swansea U.6). Furthermore, discrete gas samples were collected for 81Kr dating (Heidelberg U.11).
Jack D. Humby1, Dieter Tetzner1, Emma Fisher1, Manon Jones1, Sarah Jackson2, Geunwoo Lee2, Emilia Bushrod-Hicks1, Zelna Weich1, James Veale1, Giulia Sinnl1, Charlotte Phillips1,3, Chiara Giorio3, Madeleine Lewis1,4, Amy King1, Helen Innes5, Patrick Sugden5, Siwan Davies6, Remi Dallmayr7, Elise Fourre8, Elisa K. Conrad7, Azzurra Spagnesi9,10, Enrico Biscaro9,10, Marco Roman9,10, Mengwen Yang5, Chuanxin Gu3, Tobi Kolawole3, Alexander Zherebker3, Shaun Miller1, Dorothea Moser1, Andrea Spolaor9,10, Elena Barbaro9,10, Florian Ritterbusch11, Clara Baumbusch11, David Wachs11, Jonas Wöhrl11, Sophie Spelsberg2, Melanie Behrens8, Maria Hörhold8, Frank Wilhelms8,12, William Hutchinson5, Andrea Burke5, Hubertus Fischer2, and Elizabeth R. Thomas1 1. Ice Dynamics and Paleoclimate, British Antarctic Survey, Cambridge, UK 2. Climate and Environmental Physics, Physics Institute & Oeschger Centre for Climate Change Research, University of Bern, CH 3. Yusuf Hamied Department of Chemistry, University of Cambridge, UK 4. University of Bristol, UK 5. University of St. Andrews, UK 6. Swansea University, UK 7. Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, DE 8. Laboratoire des Sciences du Climat et de l’Environnement, FR 9. Ca’ Foscari University of Venice, IT 10. Institute of Polar Sciences, Italian National Research Council, IT 11. Heidelberg University, DE 12. University of Göttingen, Geoscience Center, Göttingen, DE
How to cite: Humby, J. and Thomas, E. and the Beyond EPICA Oldest Ice Core Impurities CFA Team: The Beyond EPICA Oldest Ice Impurities Continuous Flow Analysis, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-5685, https://doi.org/10.5194/egusphere-egu26-5685, 2026.
