EGU21-15782, updated on 26 Jul 2023
EGU General Assembly 2021
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Continuous flow analysis of the Mount Brown South ice core

Margaret Harlan1,2, Helle Astrid Kjær1, Tessa Vance2, Paul Vallelonga1, Vasileios Gkinis1, Thomas Blunier1, Anders Svensson1, Andrew Moy2,3, Chris Plummer2, Sarah Jackson4, Kerttu Peensoo1, and Aylin de Campo5
Margaret Harlan et al.
  • 1University of Copenhagen, Niels Bohr Institute, Centre for Ice and Climate, Copenhagen, Denmark (
  • 2University of Tasmania, IMAS, Hobart, Tasmania, Australia
  • 3Australian Antarctic Division, Hobart, Tasmania, Australia
  • 4Australian National University, Canberra, Australia
  • 5Graz University of Technology, Graz, Austria

The Mount Brown South (MBS) ice core is an approximately 300-meter-long ice core, drilled in 2016-2017 to the south of Mount Brown, Wilhelm II Land, East Antarctica. This location in East Antarctica was chosen as it produces an ice core with well-preserved sub-annual records of both chemistry and isotope concentrations, spanning back over 1000 years. MBS is particularly well suited to represent climate variations of the Indian Ocean sector of Antarctica, and to provide information about regional volcanism in the Southern Indian Ocean region.

A section of ice spanning the length of the MBS core was melted as part of the autumn 2019 continuous flow analysis (CFA) campaign at the Physics of Ice, Climate, and Earth (PICE) group at the University of Copenhagen. During this campaign, measurements were conducted for chemistry and impurities contained in the ice, in addition to water isotopes. The data measured in Copenhagen include measurements of H2O2, pH, electrolytic conductivity, and NH4+, Ca2+, and Na+ ions, in addition to insoluble particulate concentrations and size distribution measured using an Abakus laser particle counter.

Here, we present an overview of the CFA chemistry and impurity data, as well as preliminary investigations into the size distribution of insoluble particles and the presence of volcanic material within the ice. These initial chemistry and particulate size distribution data sets are useful in order to identify sections of the MBS core to subject to further analysis to increase our understanding of volcanic activity in the Southern Indian Ocean region.

How to cite: Harlan, M., Kjær, H. A., Vance, T., Vallelonga, P., Gkinis, V., Blunier, T., Svensson, A., Moy, A., Plummer, C., Jackson, S., Peensoo, K., and de Campo, A.: Continuous flow analysis of the Mount Brown South ice core, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-15782,, 2021.


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