Call number:
ZSP-201-82/42
In:
CRREL Report, 82-42
Description / Table of Contents:
A high-resolution impulse radar profiling system was evaluated for 1) detecting the existence of sea ice which coring has revealed to exist on the bottom of the Ross Ice Shelf at Site J-9, 2) detecting the preferred horizontal c-axis azi-muthal direction of the sea ice crystals, using the voltage amplitude of the radar reflection from the sea ice bottom, and 3) determining the direction of the currents under an Antarctic ice shelf. A field program was conducted consisting of a surface radar survey on the Ross Ice Shelf at Site J-9 and surface and airborne radar profiling on the McMurdo Ice Shelf. The CRREL impulse radar system, operating at a center frequency of either 80 MHz or 20 MHz, was unable to detect the shelf bottom at Site J-9, which drilling revealed to be 416 m below the snow surface. The radar system was used to profile the McMurdo Ice Shelf both from the snow surface and from the air; a shelf thickness of about 275 m was easily detected. Theoretical considerations indicate that the bulk conductivity of the ice shelf at Site J1-9 was higher than originally anticipated, and this limited the radar sounding depth to about 405 m when operating at a frequency of 20 MHz.
Type of Medium:
Series available for loan
Pages:
iv, 19 Seiten
,
Illustrationen
Series Statement:
CRREL Report 82-42
URL:
https://apps.dtic.mil/dtic/tr/fulltext/u2/a124456.pdf
URL:
https://hdl.handle.net/11681/9323
Language:
English
Note:
CONTENTS
Abstract
Introduction
Profiling system
Theoretical considerations
Field program
Discussion
Literature cited
Location:
AWI Archive
Branch Library:
AWI Library
