5D inversion of sea ice thickness from helicopter EM data

M. Vöge, A. Pfaffhuber, E. Auken, C. Kirkegaard, T. Boesen, S. Hendricks, P. Hunkeler

Publikation: Bidrag til bog/rapport/konferenceproceedingsKonferenceartikel i proceedingspeer review

2 Citationer (Scopus)

Abstrakt

In this paper, we present a new 2D inversion approach to invert helicopter EM data for sea-ice thicknesses. The approach uses a 2.5D finite element frequency-domain solution of the Maxwell-Equations for the secondary field. Instead of inverting for resistivity values from which the location of the sea-ice/seawater boundary is derived, we directly invert for the location of the layer boundary, using fixed values for the resistivities of air, sea-ice and seawater. Our approach was tested on a field data set from Antarctica acquired in 2005, using a frequency domain helicopter EM system. The data set covers a 500 m long profile, which contains flat sections that are approximately 1D, as well as pressure ridges with strong 2D character. The results of the 2D inversion are compared to earlier results from various 1D inversions and a sea-ice thickness data set obtained by drillings. The comparison shows that the 2D inversion gives a clear improvement for the areas with pressure ridges, while the 1D results appear to be less noisy for flat areas.

OriginalsprogEngelsk
Titel1st European Airborne Electromagnetics Conference - Held at Near Surface Geoscience 2015
ForlagEuropean Association of Geoscientists and Engineers, EAGE
Sider41-45
Antal sider5
ISBN (Elektronisk)9781510814158
StatusUdgivet - 2015
Begivenhed1st European Airborne Electromagnetics Conference - Turin, Italien
Varighed: 6 sep. 201510 sep. 2015

Publikationsserier

Navn1st European Airborne Electromagnetics Conference - Held at Near Surface Geoscience 2015

Konference

Konference1st European Airborne Electromagnetics Conference
Land/OmrådeItalien
ByTurin
Periode6/09/1510/09/15

Programområde

  • Programområde 2: Vandressourcer

Fingeraftryk

Dyk ned i forskningsemnerne om '5D inversion of sea ice thickness from helicopter EM data'. Sammen danner de et unikt fingeraftryk.

Citationsformater