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/2122/4053

Authors: Frezzotti, M.*
Bitelli, G.*
De Michelis, P.*
Deponti, A.*
Forieri, A.*
Gandolfi, S.*
Maggi, V.*
Mancini, F.*
Remy, F.*
Tabacco, I. E.*
Urbini, S.*
Vittuari, L.*
Zirizzotti, A.*
Title: Geophysical survey at Talos Dome, East Antarctica: the search for a new deep-drilling site
Title of journal: Annals of Glaciology
Series/Report no.: / 39 (2004)
Publisher: International Glaciological Society
Issue Date: 2004
Keywords: East Antarctica
RES
GPS
palaeomorphology
Abstract: Talos Dome is an ice dome on the edge of the East Antarctic plateau; because accumulation is higher here than in other domes of East Antarctica, the ice preserves a good geochemical and palaeoclimatic record. A new map of the Talos Dome area locates the dome summit using the global positioning system (GPS) (72˚47’ 14’’S, 159˚04’ 2’’E; 2318.5m elevation (WGS84)). A surface strain network of nine stakes was measured using GPS. Data indicate that the stake closest to the summit moves south-southeast at a few cma–1. The other stakes, located 8 km away, move up to 0.33ma–1. Airborne radar measurements indicate that the bedrock at the Talos Dome summit is about 400m in elevation, and that it is covered by about 1900m of ice. Snow radar and GPS surveys show that internal layering is continuous and horizontal in the summit area (15 km radius). The depth distribution analysis of snow radar layers reveals that accumulation decreases downwind of the dome (north-northeast) and increases upwind (south-southwest). The palaeomorphology of the dome has changed during the past 500 years, probably due to variation in spatial distribution of snow accumulation, driven by wind sublimation. In order to calculate a preliminary age vs depth profile for Talos Dome, a simple one-dimensional steady-state model was formulated. This model predicts that the ice 100m above the bedrock may cover one glacial–interglacial period.
Appears in Collections:Papers Published / Papers in press
02.02.03. Geomorphology
02.02.04. Ice

Files in This Item:

File Description SizeFormatVisibility
AnnGlac_Frezzotti2004.pdfmain article372.12 kBAdobe 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