Detection of differences in sea ice crystal structure using cross-borehole DC resistivity tomography

Jones, K. A.; Gough, A. J.; Ingham, M.; Mahoney, Andy; Langhorne, Patricia J.; Haskell, T. G.

doi:10.1016/j.coldregions.2012.01.013

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…This behavior would also be expected in incorporated platelet ice. We shall therefore assume that the shape of the inclusions in the SIPL is similar to that of incorporated platelet ice (as observed by Jones et al, 2012a), but that brine inclusion/void dimensions are very much larger because they are very close to the freezing point. Consequently, we calculate the relationship between solid fraction and conductivity from 405 Jones et al (2012b), by varying a and c, while keeping b and d constant and hence changing the solid/liquid content of the SIPL (see Fig.…”

Section: Sipl Conductivity and Solid Fractionmentioning

confidence: 99%

“…Figure 8 shows the horizontal conductivity for Archie's Law with cementation factor 395 m=1.75 (Haas et al, 1997), and m=3 (Hunkeler et al, 2015b), as the solid fraction is increased from 0 to 1. For sea ice specifically, Jones et al (2012a) have used a simple conductivity model (Jones et al, 2012b) to derive parameters of a sea ice "unit cell". They found that the parameters that fit the observed in situ DC horizontal and vertical resistivities depend not only on sea ice temperature but also on structure.…”

Section: Sipl Conductivity and Solid Fractionmentioning

confidence: 99%

See 1 more Smart Citation

Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica

Haas¹,

Langhorne²,

Rack³

et al. 2020

Preprint

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Abstract. Basal melting of ice shelves can result in the outflow of supercooled ice shelf water, which can lead to the formation of a sub-ice platelet layer (SIPL) below adjacent sea ice. McMurdo Sound, located in the southern Ross Sea, Antarctica, is well known for the occurrence of a SIPL linked to ice shelf water outflow from under the McMurdo Ice Shelf. Airborne, single frequency, frequency-domain electromagnetic induction (AEM) surveys were performed in November of 2009, 2011, 2013, 2016, and 2017 to map the thickness and spatial distribution of the landfast sea ice and underlying, porous SIPL. We developed a simple method to retrieve the thickness of the consolidated ice and SIPL from the EM inphase and quadrature components, supported by EM forward modeling, and calibrated and validated by drill-hole measurements. Linear regression of EM inphase measurements of apparent SIPL thickness and drill-hole measurements of true SIPL thickness yields a scaling factor of 0.3 to 0.4, and rms error of 0.47 m. EM forward modeling suggests that this corresponds to SIPL conductivities between 900 and 1800 mS/m, with associated SIPL solid fractions between 0.09 and 0.47. The AEM surveys showed the spatial distribution and thickness of the SIPL well, with SIPL thicknesses of up to 8 m near the ice shelf front. They indicate interannual SIPL thickness variability of up to 2 m. In addition, they reveal high-resolution spatial information about the small-scale SIPL thickness variability, and indicate the presence of persistent peaks in SIPL thickness that may be linked to the geometry of the outflow from under the ice shelf.

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Section: Sipl Conductivity and Solid Fractionmentioning

confidence: 99%

Section: Sipl Conductivity and Solid Fractionmentioning

confidence: 99%

Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica

Haas¹,

Langhorne²,

Rack³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

In-situ measurements of the low frequency dielectric permittivity of first-year Antarctic sea ice

Ingham

Gouws

Buchanan

et al. 2012

Cold Regions Science and Technology

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Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica

et al. 2021

View full text Add to dashboard Cite

Abstract. Basal melting of ice shelves can result in the outflow of supercooled ice shelf water, which can lead to the formation of a sub-ice platelet layer (SIPL) below adjacent sea ice. McMurdo Sound, located in the southern Ross Sea, Antarctica, is well known for the occurrence of a SIPL linked to ice shelf water outflow from under the McMurdo Ice Shelf. Airborne, single-frequency, frequency-domain electromagnetic induction (AEM) surveys were performed in November of 2009, 2011, 2013, 2016, and 2017 to map the thickness and spatial distribution of the landfast sea ice and underlying porous SIPL. We developed a simple method to retrieve the thickness of the consolidated ice and SIPL from the EM in-phase and quadrature components, supported by EM forward modelling and calibrated and validated by drill-hole measurements. Linear regression of EM in-phase measurements of apparent SIPL thickness and drill-hole measurements of “true” SIPL thickness yields a scaling factor of 0.3 to 0.4 and rms error of 0.47 m. EM forward modelling suggests that this corresponds to SIPL conductivities between 900 and 1800 mS m−1, with associated SIPL solid fractions between 0.09 and 0.47. The AEM surveys showed the spatial distribution and thickness of the SIPL well, with SIPL thicknesses of up to 8 m near the ice shelf front. They indicate interannual SIPL thickness variability of up to 2 m. In addition, they reveal high-resolution spatial information about the small-scale SIPL thickness variability and indicate the presence of persistent peaks in SIPL thickness that may be linked to the geometry of the outflow from under the ice shelf.

show abstract

Detection of differences in sea ice crystal structure using cross-borehole DC resistivity tomography

Cited by 3 publications

References 28 publications

Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica

Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica

In-situ measurements of the low frequency dielectric permittivity of first-year Antarctic sea ice

Airborne mapping of the sub-ice platelet layer under fast ice in McMurdo Sound, Antarctica

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