Brief communication: Unravelling the composition and microstructure of a permafrost core using X-ray computed tomography
- 1Permafrost Research Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
- 2Department of Soil System Science, Helmholtz Centre for Environmental Research – UFZ, Halle (Saale), Germany
- 3Institute of Geosciences, University of Potsdam, Potsdam, Germany
- 4Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany
- 1Permafrost Research Section, Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany
- 2Department of Soil System Science, Helmholtz Centre for Environmental Research – UFZ, Halle (Saale), Germany
- 3Institute of Geosciences, University of Potsdam, Potsdam, Germany
- 4Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany
Abstract. The microstructure of permafrost ground contains clues to its formation and hence its preconditioning to future change. We applied X-ray computed tomography (CT) to obtain high-resolution data (Δx=50 µm) of the composition of a 164 cm long permafrost core drilled in a Yedoma upland in northeastern Siberia. The CT analysis allowed to directly map and quantify excess ice, gas inclusions, and two distinct sediment phases. Using laboratory measurements of coarsely-resolved core samples, we statistically estimated the composition of the sediment phases and indirectly quantified pore ice, organic, and mineral contents. We conclude that CT is a promising method for obtaining physical properties of permafrost cores which opens novel research potentials.
Jan Nitzbon et al.
Status: open (until 28 Jun 2022)
Jan Nitzbon et al.
Data sets
Laboratory-measured and X-ray CT-derived volumetric composition of a permafrost core Nitzbon, Jan; Gadylyaev, Damir; Schlüter, Steffen; Köhne, John Maximilian; Grosse, Guido; Boike, Julia https://doi.org/10.5281/zenodo.6397474
Jan Nitzbon et al.
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