Preprints
https://doi.org/10.5194/tc-2021-219
https://doi.org/10.5194/tc-2021-219

  05 Aug 2021

05 Aug 2021

Review status: this preprint is currently under review for the journal TC.

Seismic physics-based characterization of permafrost sites using surface waves

Hongwei Liu, Pooneh Maghoul, and Ahmed Shalaby Hongwei Liu et al.
  • Department of Civil Engineering, University of Manitoba, 75A Chancellors Circle, Winnipeg, MB, Canada

Abstract. The adverse effects of climate warming on the built environment in (sub)arctic regions are unprecedented and accelerating. Planning and design of climate-resilient northern infrastructure as well as predicting deterioration of permafrost from climate model simulations require characterizing permafrost sites accurately and efficiently. Here, we propose a novel algorithm for analysis of surface waves to quantitatively estimate the physical and mechanical properties of a permafrost site. We show the existence of two types of Rayleigh waves (R1 and R2; R1 travels relatively faster than R2). The R2 wave velocity is highly sensitive to the physical properties (e.g., unfrozen water content, ice content, and porosity) of permafrost or soil layers while it is less sensitive to their mechanical properties (e.g., shear modulus and bulk modulus). The R1 wave velocity, on the other hand, depends strongly on the soil type and mechanical properties of permafrost or soil layers. In-situ surface wave measurements revealed the experimental dispersion relations of both types of Rayleigh waves from which relevant properties of a permafrost site can be derived by means of our proposed hybrid inverse and multi-phase poromechanical approach. Our study demonstrates the potential of surface wave techniques coupled with our proposed data-processing algorithm to characterize a permafrost site more accurately. Our proposed technique can be used in early detection and warning systems to monitor infrastructure impacted by permafrost-related geohazards, and to detect the presence of layers vulnerable to permafrost carbon feedback and emission of greenhouse gases into the atmosphere.

Hongwei Liu et al.

Status: open (until 30 Sep 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2021-219', Anonymous Referee #1, 03 Sep 2021 reply
  • RC2: 'Comment on tc-2021-219', Anonymous Referee #2, 06 Sep 2021 reply
  • RC3: 'Comment on tc-2021-219', Ludovic Moreau, 10 Sep 2021 reply

Hongwei Liu et al.

Data sets

Quantitative and qualitative characterization of permafrost sites using surface waves Hongwei Liu; Pooneh Maghoul; Ahmed Shalaby https://doi.org/10.5281/zenodo.5159712

Model code and software

WaveFrost Hongwei Liu; Pooneh Maghoul; Ahmed Shalaby https://github.com/Siglab-code/WaveFrost

Hongwei Liu et al.

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Short summary
The knowledge of physical and mechanical properties of permafrost and its location is critical for the management of permafrost-related geohazards. Here, we developed a hybrid inverse and multi-phase poromechanical approach to quantitatively estimate the physical and mechanical properties of a permafrost site. Our study demonstrates the potential of surface wave techniques coupled with our proposed data-processing algorithm to characterize a permafrost site more accurately.