Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
June 1996
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Electromagnetic Induction Sounding of Sea Ice Thickness
6. AUTHORS
Austin Kovacs, Deborah Diemand and John J. Bayer, Jr.
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
CRREL 96-6
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Hanover, New Hampshire 03755-1290
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement consult ASTM Standard E380-93, Standard Practice for
Use of the International System of Units, published by the American Society for Testing and Materials, 1916 Race St.,
Philadelphia, Pa. 19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161
13. ABSTRACT (Maximum 200 words)
Field results from a man-portable electromagnetic induction sounding instrument, with special plug-in data
processing modules for the remote measurement of sea ice thickness, are discussed. The field trials indicate that
the instrument was capable of estimating undeformed sea ice thickness, with a snow cover, generally within
about 5% of the drill hole measured thicknesses from about 1.25 to 4.5 m. No ice under 1.25 m was sounded in
this study. Instrument thickness determinations of multiyear sea ice over about 4.5 m thick showed larger
deviation from the drill hole snow and ice thickness measurement. It is proposed that the undulating multiyear
sea ice relief is the major cause of the EM deviation.
14. SUBJECT TERMS
15. NUMBER OF PAGES
16
Remote Sensing
Thickness
16. PRICE CODE
Electromagnetic instruments
Sea ice
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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