Publikationsdatum:
2019-07-17
Beschreibung:
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.
Repository-Name:
EPIC Alfred Wegener Institut
Materialart:
Article
,
isiRev
Format:
application/pdf
