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  • Articles  (3)
  • GPS  (3)
  • Terra Antartica Publication  (2)
  • Blackwell Publishing Ltd  (1)
  • American Physical Society
  • Institute of Physics
  • Nature Publishing Company
  • 2005-2009  (3)
  • 1985-1989
  • 1945-1949
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  • Articles  (3)
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  • 2005-2009  (3)
  • 1985-1989
  • 1945-1949
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  • 1
    Publication Date: 2017-04-04
    Description: Ice divide-dome migration is a key parameter in mass balance studies and in the interpretation of ice cores. The stability of the dome and position of the ice divide must be known to accurately interpret ice core records and to complete mass balance studies. Models of depth-age relationships for deep ice cores are sensitive to migration of the dome position (Anandakrishnan et al., 1994). The evolution of an ice divide is driven by the accumulation-rate history, its spatial pattern and conditions at ice-sheet boundaries (e.g. Frezzotti et al., 2004; Hindmarsh, 1996; Nereson et al., 1998). Ice divide migration is also important in determining the input parameter of large Antarctic drainage basins. Due to the very low slope (less than a decimetre per km) of East Antarctic domes and to surface morphology (e.g. sastrugi), it is very difficult to determine the summit point of a dome and its migration in time. In 2004 a new ice coring project, TALDICE (Talos Dome Ice Core Project), started at TD to recover 1550 m of ice spanning the last 120 000 years (Frezzotti et al., 2004). This paper discusses preliminary findings on the present and past morphology of Talos Dome based on detailed snow accumulation data, radar-derived isochrons and ice velocity measurements in the last 10 years.
    Description: Published
    Description: 51-54
    Description: 3.8. Geofisica per l'ambiente
    Description: N/A or not JCR
    Description: open
    Keywords: Ice Dome ; GPR ; GPS ; Mass Balance ; 02. Cryosphere::02.02. Glaciers::02.02.05. Ice dynamics ; 02. Cryosphere::02.02. Glaciers::02.02.06. Mass balance
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 2
    Publication Date: 2017-04-03
    Description: Determining snow accumulation is one of the principal challenges in mass balance studies and in the interpretation of ice core records. Accurate knowledge of the spatial distribution of snow accumulation is fundamental for understanding the present mass balance and its implication on sea level change, for reliable numerical simulation of past and future ice sheet dynamics, and for creating atmospheric climate models. Depth-age models for deep ice cores require knowledge of the temporal variability of snow accumulation. Accumulation of snow principally results from precipitation of snow and its redistribution/ablation by wind at the surface (Frezzotti et al., 2004a). Chemical and isotopic analysis of ice cores reveals seasonal and annual signals. However, these signals may not be representative of annual snow accumulation or of the annual chemical/isotopic composition of snow. Talos Dome (TD, 72°48’S; 159°06’E, 2316 m, T -41.0 °C) is an ice dome on the edge of the East Antarctic plateau, about 290 km from the Southern Ocean and 250 km from the Ross Sea (Fig. 1). An ice core is currently being drilled at this site (Frezzotti et al., 2004b) within the framework of the Talos Dome Ice Core Project (TALDICE). In order to provide detailed information on the temporal and spatial variability of snow accumulation, research was conducted at Talos Dome and along a North-South transect (GV7-GV5-TD-31DPT) in the framework of the ITASE programme. The 400 km-long transect follows the ice divide from the Southern Ocean to Talos Dome, and then continues in a southward direction towards Taylor Dome. Stake network measurements, ice core analysis and snow radar surveys along the transect have provided detailed information for reconstructing the temporal (annual) and spatial (meter scale) variability of snow accumulation over the last 200 years at the km scale.
    Description: Published
    Description: 21-25
    Description: 3.8. Geofisica per l'ambiente
    Description: N/A or not JCR
    Description: open
    Keywords: Ice Dome ; Mass Balance ; GPR ; GPS ; 02. Cryosphere::02.02. Glaciers::02.02.06. Mass balance
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
    Publication Date: 2017-04-04
    Description: The tectonic deformation of the Lipari-Vulcano complex, one of the most important active volcanic areas of Mediterranean region, is studied here through the analysis of ten years (1996-2006) of GPS data from both 3 permanent and 13 non-permanent stations. This area can be considered crucial for the understanding of the Eurasia-Africa plates interaction in the Mediterranean area, and, in general, this work emphasize a methodological approach, already applied in other areas worldwide (e.g. Shen et al., 1996, El-Fiki and Kato, 1999) where geodetic data and strain parameters maps of critical areas can help to improve our understanding of their geodynamical aspects. In this framework, this study is aimed at providing a kinematic deformation model on the basis of the dense geodetically estimated velocities of the Lipari-Vulcano complex. In particular, the observed deformation pattern can be described by a mix between 1) the main N-S regional compression and 2) a NNE-SSW compression with a small right-lateral strike slip component acting along a tectonic structure N°40W trending located between the two islands. This pattern was inspected through a simplified synthetic model.
    Description: This research has benefited from funding provided by the Italian Presidenza del Consiglio dei Ministri – Dipartimento della Protezione Civile (DPC).
    Description: Published
    Description: 370–377
    Description: 1.9. TTC - Rete GPS nazionale
    Description: JCR Journal
    Description: reserved
    Keywords: GPS ; Aeolian Islands ; strain ; modelling ; 04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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