Brief communication: Unravelling the composition and microstructure of a permafrost core using X-ray computed tomography


Contact
jan.nitzbon [ at ] awi.de

Abstract

The microstructure of permafrost ground contains clues to its formation and hence its preconditioning to future change. We applied X-ray computed microtomography (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 north-eastern Siberia. The CT analysis allowed the microstructures to be directly mapped and volumetric contents of excess ice, gas inclusions, and two distinct sediment types to be quantified. Using laboratory measurements of coarsely resolved core samples, we statistically estimated the composition of the sediment types and used it to indirectly quantify volumetric contents of pore ice, organic matter, and mineral material along the core. We conclude that CT is a promising method for obtaining physical properties of permafrost cores which opens novel research potentials.



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Helmholtz Cross Cutting Activity (2021-2027)
Research Networks
Publication Status
Published
Eprint ID
57036
DOI 10.5194/tc-16-3507-2022

Cite as
Nitzbon, J. , Gadylyaev, D. , Schlüter, S. , Köhne, J. M. , Grosse, G. and Boike, J. (2022): Brief communication: Unravelling the composition and microstructure of a permafrost core using X-ray computed tomography , The Cryosphere, 16 (9), pp. 3507-3515 . doi: 10.5194/tc-16-3507-2022


Download
[thumbnail of tc-16-3507-2022.pdf]
Preview
PDF
tc-16-3507-2022.pdf

Download (2MB) | Preview

Share


Citation

Research Platforms

Campaigns
Arctic Land Expeditions > RU-Land_2017_Lena


Actions
Edit Item Edit Item