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Open AccessArticle

Glacier Flow Dynamics of the Severnaya Zemlya Archipelago in Russian High Arctic Using the Differential SAR Interferometry (DInSAR) Technique

1
Centrer of Studies in Resources Engineering, IIT Bombay, Mumbai 400076, India
2
Institute of Geography, Russian Academy of Sciences, Moscow 119991, Russia
3
Instituto de Oceanografia, Universidade Federal do Rio Grande (FURG), Rio Grande 96203-900, Brazil
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2466; https://doi.org/10.3390/w11122466
Received: 30 September 2019 / Revised: 7 November 2019 / Accepted: 13 November 2019 / Published: 23 November 2019
(This article belongs to the Special Issue Impacts of Climate Change on Water Resources in Glacierized Regions)
Glacier velocity is one of the most important parameters to understand glacier dynamics. The Severnaya Zemlya archipelago is host to many glaciers of which four major ice caps encompassing these glaciers are studied, namely, Academy of Sciences, Rusanov, Karpinsky, and University. In this study, we adopted the differential interferometric synthetic aperture radar (DInSAR) method utilizing ALOS-2/PALSAR-2 datasets, with a temporal resolution of 14 days. The observed maximum velocity for one of the marine-terminating glaciers in the Academy of Sciences Ice Cap was 72.24 cm/day (≈263 m/a). For the same glacier, an increment of 3.75 times the flow rate was observed in 23 years, compared to a previous study. This has been attributed to deformation in the bed topography of the glacier. Glaciers in other ice caps showed a comparatively lower surface velocity, ranging from 7.43 to 32.12 cm/day. For estimating the error value in velocity, we selected three ice-free regions and calculated the average value of their observed movement rates by considering the fact that there is zero movement for ice-free areas. The average value observed for the ice-free area was 0.09 cm/day, and we added this value in our uncertainty analysis. Further, it was observed that marine-terminating glaciers have a higher velocity than land-terminating glaciers. Such important observations were identified in this research, which are expected to facilitate future glacier velocity studies. View Full-Text
Keywords: glacier movement; differential SAR interferometry; marine-terminating glacier glacier movement; differential SAR interferometry; marine-terminating glacier
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Nela, B.R.; Bandyopadhyay, D.; Singh, G.; Glazovsky, A.F.; Lavrentiev, I.I.; Kromova, T.E.; Arigony-Neto, J. Glacier Flow Dynamics of the Severnaya Zemlya Archipelago in Russian High Arctic Using the Differential SAR Interferometry (DInSAR) Technique. Water 2019, 11, 2466.

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