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    <title>DSpace Collection: 02.02.99. General or miscellaneous</title>
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  <item rdf:about="http://hdl.handle.net/2122/4082">
    <title>Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica</title>
    <link>http://hdl.handle.net/2122/4082</link>
    <description>Title: Analysis of bottom morphology of the David Glacier-Drygalski Ice Tongue, East Antarctica
&lt;br/&gt;
&lt;br/&gt;Authors: Tabacco, I. E.; Sezione Geofisica, Dipartimento di Science della Terra, Università degli Studi di Milano, I-20129 Milano, Italy; Bianchi, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Chiappini, M.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Zirizzotti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Zuccheretti, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
&lt;br/&gt;
&lt;br/&gt;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&#xD;
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&#xD;
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.</description>
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  <item rdf:about="http://hdl.handle.net/2122/4011">
    <title>Five subglacial lakes and one of Antarctica's thickest ice covers newly determined by radio echo sounding over the Vostok-Dome C region</title>
    <link>http://hdl.handle.net/2122/4011</link>
    <description>Title: Five subglacial lakes and one of Antarctica's thickest ice covers newly determined by radio echo sounding over the Vostok-Dome C region
&lt;br/&gt;
&lt;br/&gt;Authors: Cafarella, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Urbini, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Bianchi, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Zirizzotti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Tabacco, I. E.; Dip. Science della Terra, Sez. Geofisica, Via Cicognara 7, 20129 Milan, Italy; Forieri, A.; Dip. Science della Terra, Sez. Geofisica, Via Cicognara 7, 20129 Milan, Italy
&lt;br/&gt;
&lt;br/&gt;Abstract: Radio echo sounding (RES) measurements were collected from 1995 to 2003 during Italian Antarctic expeditions over the Vostok-Dome C&#xD;
region. The data collected allow for the reconstruction of a bedrock elevation&#xD;
map between the Belgica Highlands and the Aurora Subglacial Basin (112.0° - 124.0°E 74.0° - 78.0°S). Moreover, analysis of the RES data has revealed one of the thickest ice covers in Antarctica (4755 ± 16 m; 118.321°E, 76.059°S) as well as five new subglacial lakes.</description>
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  <item rdf:about="http://hdl.handle.net/2122/4008">
    <title>Italian RES Investigation in Antarctica: The New Radar System</title>
    <link>http://hdl.handle.net/2122/4008</link>
    <description>Title: Italian RES Investigation in Antarctica: The New Radar System
&lt;br/&gt;
&lt;br/&gt;Authors: Tabacco, I. E.; Dip. Scienze della Terra, Sez. Geofisica, Via Cicognara 2, Milano - Italy; Bianchi, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Baskaradas, J. A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Cafarella, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Sciacca, U.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia; Zirizzotti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Zuccheretti, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia
&lt;br/&gt;
&lt;br/&gt;Abstract: A Radio Echo Sounding (RES) system is an active remote-sensing instrument that uses electromagnetic wave penetration into the ice to obtain information on the depth of the bedrock and on the ice thickness and its inhomogeneities, i.e. internal layering of glaciers and subglacial lake exploration. In 1995 the INGV developed its own airborne radio echo sounding system, which is continuously being upgraded. During the 1995, 1997, 1999, 2001 and 2003 Italian Antarctic&#xD;
Expeditions, the RES system was used to investigate different Antarctic regions.&#xD;
During 2007-2008 campaign, new RES systems will be used. In the following the main characteristics of the systems will be briefly described.</description>
  </item>
  <item rdf:about="http://hdl.handle.net/2122/4007">
    <title>RES Investigation of the Aurora Basin Area (East Antarctica)</title>
    <link>http://hdl.handle.net/2122/4007</link>
    <description>Title: RES Investigation of the Aurora Basin Area (East Antarctica)
&lt;br/&gt;
&lt;br/&gt;Authors: Cafarella, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Urbini, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Bianchi, C.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Zirizzotti, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Tabacco, I. E.; Dipartimento Scienze della Terra, Sez. Geofisica, Milano - Italy; Forieri, A.; Dipartimento Scienze della Terra, Sez. Geofisica, Milano - Italy
&lt;br/&gt;
&lt;br/&gt;Abstract: We analyse radio echo sounding (RES) data on the region between Lake Vostok and the Belgica Subglacial Highlands (East Antarctica) collected during four Italian expeditions (1995, 1999, 2001 and 2003). The survey aimed to define the morphological characteristics of the Aurora Trench and to aid the exploration of subglacial lakes.</description>
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