Call number:
ZSP-201-91/12
In:
CRREL Report, 91-12
Description / Table of Contents:
Field trials using a man-portable Geonics, Ltd., EM31 electromagnetic induction sounding instrument, with a plug-in data processing module, for the remote measurement of sea ice thickness, are discussed. The processing module was made by Flow Research Inc., to directly measure sea ice thickness and show the result in a numerical display. The EM31-processing module system was capable of estimating ice thickness within 10% of the true value for ice from about 0.7 to 3.5 m thick, the oldest undeformed ice in the study area. However, since seawater under the Arctic pack ice has a relatively uniform conductivity (2.5 + or - 0.05 S/m), a simplified method, which can be used for estimating sea ice thickness using jet an EM31 instrument, is discussed. It uses only the EM31's conductivity measurement, is easy to put into use and does not rely on theoretically derived look-up tables or phasor diagrams, which may not be accurate for the conditions of the area.
Type of Medium:
Series available for loan
Pages:
iv, 23 Seiten
,
Illustrationen
Series Statement:
CRREL Report 91-12
URL:
https://apps.dtic.mil/dtic/tr/fulltext/u2/a240974.pdf
URL:
https://hdl.handle.net/11681/9126
Language:
English
Note:
CONTENTS
Preface
Introduction
EM 31 Sounding concepts
Previous EMI studies
Beaufort Sea field trials
EM 31 Conductivity reading versus sea ice thickness
General comments
Literature cited
Abstract
Location:
AWI Archive
Branch Library:
AWI Library
