Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4082

Authors: Tabacco, I. E.*
Bianchi, C.*
Chiappini, M.*
Zirizzotti, A.*
Zuccheretti, E.*
Title: Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica
Title of journal: Annals of Glaciology
Series/Report no.: / 30 (2000)
Publisher: International Glaciological Society
Issue Date: 2000
Keywords: glaciers
radio-echo-sounding
radio propagation in the ice
Abstract: Data from radio-sounding measurements have been analysed to determine the ice thickness and the bottom morphology of Drygalski Ice Tongue, Antarctica. The morphology and the structure of the bottom surface has been studied through an electromagnetic interpretation. A function that includes the gain/loss due to the geometrical shape of the reflecting surfaces has been calculated. Such a function has been evaluated assuming some physical electromagnetic quantities (the temperature of the glacier, the complex dielectric permittivity of ice, sea ice and sea water). The ice-water interface shows both concave and convex faces toward the sounding system, producing a focusing or defocusing effect, detected as absolute (or relative) amplitude variation in the echo signal. It is shown that the calculated function follows quite well the observed bottom rippled surface of the glacier tongue estimated from the time-arrival measurements of the echo signal.
Appears in Collections:Papers Published / Papers in press
02.02.10. Instruments and techniques
02.02.07. Ocean/ice interaction
02.02.99. General or miscellaneous

Files in This Item:

File Description SizeFormatVisibility
tabacco.pdfmain article3.99 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Share this record
Del.icio.us

Citeulike

Connotea

Facebook

Stumble it!

reddit


 

Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA