Estimate of Seasonal Variations in Flow of Glacier Grey, Patagonia, in SAR Images
Main Article Content
Abstract
This study aims to estimate the fl ow velocities of Grey Glacier, located in Southern Patagonian Ice Field, between
October 2011 and May 2012. Obtained by an algorithm based on cross-correlation calculation between pairs of
COSMO-SkyMed SAR images, the velocity values were then interpolated to generate continuous surfaces and which
show the direction of fl ow intensity Glacier. The results were compared with meteorological data, provided by the
Meteorological Service of Argentina, to interpret the seasonal pattern in velocity. October-April registered values of
fl ow velocity of 1,2 ± 0,6 md-1 and 1,1 ± 0,5 md-1; respectively. During the summer, the months of January, February
and March had values of fl ow velocity of 1,5 ± 0,7 md-1; 1,3 ± 0,6 md-1 and 1,4 ± 0,7 md-1 varying directly with the
monthly average temperature. With a correlation coeffi cient at 0,96; the results indicate that the monthly fl ow of glacier
Grey have a positively related with the air temperature at the surface. The technique developed, from the algorithm
applied correlCorresp using MATLAB, allowed an enhanced analysis of the variations in surface velocity of glaciers
in the most distinct temporal and spatial scales.
Downloads
Article Details
Section
This work is licensed under a Creative Commons Attribution 3.0 Unported License.
Authors who publish in this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
- Authors can enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) before and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (see "The Effect of Open Access").
How to Cite
