Ice shelf density reconstructed from optical televiewer borehole logging

Bryn Hubbard, Jean-louis Tison, Morgane Philippe, Billie Heene, Frank Pattyn, Terry Malone, Johannes Freitag

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

21 Dyfyniadau (Scopus)

Crynodeb

Optical televiewer luminosity logs are compared with densities measured gravimetrically on 520 snow, firn and ice samples from two locations of similar annual temperature (~ − 14 °C) and contrasting accumulation rates (0.23 and 0.43 m w.e. per year) on the Roi Baudouin Ice Shelf, Antarctica. At the scale of ≥10-1 m, an inverse exponential relationship (R2 = 0.96) is recorded between density and luminosity, indicating (i) that OPTV luminosity provides an effective proxy for density at such ice shelves, and (ii) that densities may be reconstructed from boreholes drilled elsewhere by hot water without the need for core material. Our analysis also suggests that this relationship may hold for newly-formed ice as well as for snow and firn. At the scale of ≤10-1 m, both luminosity and density show similar patterns, but precise correlation is confounded by detailed differences between the two records.
Iaith wreiddiolSaesneg
Tudalennau (o-i)5882-5887
CyfnodolynGeophysical Research Letters
Cyfrol40
Rhif cyhoeddi22
Dyddiad ar-lein cynnar19 Tach 2013
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 28 Tach 2013

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