Publication Date:
2017-04-04
Description:
The monitoring of crustal motions in Northern Victoria Land (NVL) of Antarctica by means
of episodic GPS stations (EGPSs) provides an accurate and dense (∼50-km spaced) velocity
field. The data, gathered starting in Austral summer 1999, derive from a series of benchmarks
belonging to the Victoria Land Network for DEFormation control (VLNDEF) geodetic
network. The velocity uncertainties are checked on the basis of length and returning time
of the episodic surveys, to obtain a meaningful strain rate field by means of a least-square
computation where the contribution of a GPS station is weighted by the inverse square of
its velocity error. The study shows that the NVL is characterized by a complex kinematics
and that, although three subregions with different prevailing deformational behaviour can be
recognized, the single blocks cannot be resolved because too few stations exist. Only features
having 150–200 km size at least can be recognized. Moreover, it is demonstrated that an
appropriate data processing of EGPS data can lead to an accurate evaluation of the strain rate
field even in a harsh environment like Antarctica.
Description:
Published
Description:
851-862
Description:
3.3. Geodinamica e struttura dell'interno della Terra
Description:
JCR Journal
Description:
reserved
Keywords:
Time-series analysis
;
Satellite geodesy
;
Geomorphology
;
Antarctica
;
04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
