The under-ice acoustic transmission experiment of 2013, conducted under ice cover in the Fram Strait, was analyzed for bottom interactions for the purpose of developing a model of the seabed. Using the acoustic signals, as well as data from other sources, including cores, gravimetric, refraction, and seismic surveys, it was deduced that the seabed may be modeled as a thin surficial layer overlaid on a deeper sediment. The modeling was based on the Biot–Stoll model for acoustic propagation in porous sediments, aided by more recent developments that improve parameter estimation and depth dependence due to consolidation. At every stage, elastic and fluid approximations were explored to simplify the model and improve computational efficiency. It was found the surficial layer could be approximated as a fluid, but the deeper sediment required an elastic model. The full Biot–Stoll model, while instrumental in guiding the model construction, was not needed for the final computation. The model could be made to agree with the measurements by adjusting the surficial layer thickness.
References
1.
Applied Physics Laboratory, University of Washington
(1994
). “ APL-UW high-frequency ocean environmental acoustic models handbook
,” Technical Report APL-UW 9407.2.
Bachrach
, R.
, Dvorkin
, J.
, and Nur
, A.
(2000
). “ Seismic velocities and Poisson's ratio of shallow unconsolidated sands
,” Geophysics
65
(2
), 559
–564
.3.
Buckingham
, M. J.
(2007
). “ On pore-fluid viscosity and the wave properties of saturated granular materials including marine sediments
,” J. Acoust. Soc. Am.
122
(3
), 1486
–1501
.4.
Chotiros
, N. P.
(2017
). Acoustics of the Seabed as a Poroelastic Medium
(Springer
, Cham, Switzerland
).5.
Colosi
, J. A.
, Scheer
, E. K.
, Flatté
, S. M.
, Cornuelle
, B. D.
, Dzieciuch
, M. A.
, Munk
, W. H.
, Worcester
, P. F.
, Howe
, B. M.
, Mercer
, J. A.
, Spindel
, R. C.
, Metzger
, K.
, Birdsall
, T. G.
, and Baggeroer
, A. B.
(1999
). “ Comparisons of measured and predicted acoustic fluctuations for a 3250-km propagation experiment in the eastern North Pacific ocean
,” J. Acoust. Soc. Am.
105
(6
), 3202
–3218
.6.
Dethleff
, D.
, and Gesa
, K.
(2010
). “ Fram Strait sea-ice sediment provinces based on silt and clay compositions identify Siberian Kara and Laptev seas as main source regions
,” Polar Res.
29
, 265
–282
.7.
Geissler
, W. H.
, and Jokat
, W.
(2004
). “ A geophysical study of the northern Svalbard continental margin
,” Geophys. J. Int.
158
(1
), 50
–66
.8.
Geissler
, W. H.
, Jokat
, W.
, and Brekke
, H.
(2011
). “ The Yermak plateau in the Arctic ocean in the light of reflection seismic data-implication for its tectonic and sedimentary evolution
,” Geophys. J. Int.
187
(3
), 1334
–1362
.9.
Geissler
, W. H.
, Pulm
, P. V.
, Jokat
, W.
, and Gebhardt
, A. C.
(2014
). “ Indications for the occurrence of gas hydrates in the Fram Strait from heat flow and multichannel seismic reflection data
,” J. Geol. Res.
2014
, 1
–12
.10.
Glover
, P. W. J.
, and Walker
, E.
(2009
). “ Grain-size to effective pore-size transformation derived electrokinetic theory
,” Geophysics
74
(1
), E17
–E29
.11.
Hamilton
, E. L.
(1980
). “ Geoacoustic modeling of the sea floor
,” J. Acoust. Soc. Am.
68
(5
), 1313
–1340
.12.
Hope
, G.
, Sagen
, H.
, Storheim
, E.
, Hobæk
, H.
, and Freitag
, L.
(2017
). “ Measured and modeled acoustic propagation underneath the rough arctic sea-ice
,” J. Acoust. Soc. Am.
142
(3
), 1619
–1633
.13.
Jackson
, D. R.
, and Richardson
, M. D.
(2006
). ONR: The Underwater Acoustics Series
in High-Frequency Seafloor Acoustics
(Springer
, New York
), p. 334
.14.
Jokat
, W.
, Weigelt
, E.
, Kristoffersen
, Y.
, Rasmussen
, T.
, and Schöne
, T.
(1995
). “ New geophysical results from the south-western Eurasian Basin (Morris Jesup Rise, Gakkel Ridge, Yermak Plateau) and the Fram Strait
,” Geophys. J. Int.
123
, 601
–610
.15.
Käss
, M.
, Vedenin
, A.
, Hasemann
, C.
, Brandt
, A.
, and Soltwedel
, T.
(2019
). “ Community structure of macrofauna in the deep Fram Strait: A comparison between two bathymetric gradients in ice-covered and ice-free areas
,” Deep-Sea Res. Pt. I
152
, 103102
.16.
Mavko
, G.
, Mukerji
, T.
, and Dvorkin
, J.
(1998
). The Rock Physics Handbook
(Cambridge University Press
, Cambridge, UK
).17.
Medwin
, H.
(1974
). “ Sound phase and amplitude fluctuations due to temperature microstructure in the upper ocean
,” J. Acoust. Soc. Am.
56
(4
), 1105
–1110
.18.
Nayar
, K. G.
, Sharqawy
, M. H.
, and Lienhard
, J. H.
, V (2016
). “ MIT seawater thermophysical properties library
,” http://web.mit.edu/seawater/2017_MIT_Seawater_Property_Tables_r2b.pdf (last accessed January 10, 2021).19.
Pride
, S. R.
(2005
). “ Relationships between seismic and hydrological properties
,” in Hydrogeophysics
(Springer
, Amsterdam
), pp. 253
–290
.20.
Revil
, A.
, and Cathles
, L. M. I.
(1999
). “ Permeability of shaly sands
,” Water Resources Res.
35
(3
), 651
–662
.21.
Riedel
, M.
, Wallmann
, K.
, Berndt
, C.
, Pape
, T.
, Freudenthal
, T.
, Bergenthal
, M.
, Bünz
, S.
, and Bohrmann
, G.
(2018
). “ In situ temperature measurements at the Svalbard continental margin: Implications for gas hydrate dynamics
,” Geochem. Geophys. Geosyst.
19
(4
), 1165
–1177
.22.
Schmidt
, H.
(2011
). Oases Version 3.1: User Guide and Reference Manual
(Massachusetts Institute of Technology
, Cambridge, MA
).23.
Stein
, R.
(2005
). Scientific Cruise Report of the Arctic Expedition ARK-XX/3 of RV Polarstern in 2004: Fram Strait, Yermak Plateau and East Greenland Continental Margin
(Alfred-Wegener-Institut für Polar- und Meeresforschung, Bremerhaven, Germany).24.
Stoll
, R. D.
, and Kan
, T. K.
(1981
). “ Reflection of acoustic waves at a water-sediment interface
,” J. Acoust. Soc. Am.
70
(1
), 149
–156
.25.
Tarng
, J. H.
, Wang
, L. K.
, Yang
, C. C.
, and McDaniel
, S. T.
(1988
). “ Arrival time and pulse width of acoustic pulses in a turbulent ocean
,” J. Acoust. Soc. Am.
84
(5
), 1802
–1807
.26.
Walton
, K.
(1987
). “ The effective elastic moduli of a random pack of spheres
,” J. Mech. Phys. Sol.
35
, 213
–226
.27.
Wentworth
, C. K.
(1922
). “ A scale of grade and class terms for clastic sediments
,” J. Geol.
30
(5
), 377
–392
.28.
Worcester
, P. F.
, Cornuelle
, B. D.
, Dzieciuch
, M. A.
, Munk
, W. H.
, Howe
, B. M.
, Mercer
, J. A.
, Spindel
, R. C.
, Colosi
, J. A.
, Metzger
, K.
, Birdsall
, T. G.
, and Baggeroer
, A. B.
(1999
). “ A test of basin-scale acoustic thermometry using a large- aperture vertical array at 3250-km range in the eastern North Pacific Ocean
,” J. Acoust. Soc. Am.
105
(6
), 3185
–3201
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