Short-term surface ice motion variations measured with a ground-based portable real aperture radar interferometer

Riesen, P.; Strozzi, Tazio; Bauder, Andreas; Wiesmann, Andreas; Funk, Martin

doi:10.3189/002214311795306718

Cited by 26 publications

(20 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Caduff et al (2015) review the TRI technique, and glaciological applications are discussed in Werner et al (2008), Riesen et al (2011), andVoytenko et al (2015a). We first used TRI at Helheim Glacier during August 2013 to observe tidal variability of the glacier front velocity (Voytenko et al, 2015b).…”

Section: Tri Backgroundmentioning

confidence: 99%

An Intensive Observation of Calving at Helheim Glacier, East Greenland

et al. 2016

View full text Add to dashboard Cite

Section: Tri Backgroundmentioning

confidence: 99%

An Intensive Observation of Calving at Helheim Glacier, East Greenland

et al. 2016

View full text Add to dashboard Cite

“…2008) demonstrated the capabilities of terrestrial radar to monitor glacier and snow evolution. More recently, in Strozzi et al (2012) and Riesen et al (2011), the authors focused on monitoring a short-term surface ice motion linked to the fast drainage of an adjacent lake. In Allstadt et al (2015) the results of a radar survey were used as validation of a glacier deformation model.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Alpine glacier surface deformations with GB-SAR

Dematteis

Luzi

Giordan

et al. 2017

Remote Sensing Letters

View full text Add to dashboard Cite

We present methods and results from interferometric data processing of a long-lasting survey campaign monitoring the Planpincieux glacier, located on the Italian side of the Mont Blanc, using a ground-based synthetic aperture radar (GB-SAR). Monitoring a European Alpine glacier during the winter, when the meteorological conditions are highly variable, presents some difficulties in radar data interpretation. The main issues to tackle in interferometric processing are unwrapping errors and high amplitude dispersion (DA), mainly due to the high velocity and dielectric heterogeneity of the backscattering surface. To improve the reliability of the results, a coherence-driven pixel-selection criterion for identifying the glacier area and a simple approach to reduce possible unwrapping errors in interferograms with low coherence are here proposed. The development of a new 2D polynomial regression model, as a function of elevation, for atmospheric phase screen (APS) estimation is also discussed. A comparison with the results obtained with a vision-based approach gave showed good agreement. ARTICLE HISTORY

show abstract

“…The ability to image the velocity field of entire glaciers from one viewpoint with minimal shadowing sets this study area apart. Most previous studies only image part of the glaciers under investigation, usually due to less favorable viewing geometries (e.g., Noferini et al, 2009;Voytenko et al, 2015;Riesen et al, 2011). However, the steep topography and local climatic factors at Mount Rainier result in strong atmospheric variability and turbulence -a major source of noise for radar interferometry techniques (Goldstein, 1995).…”

Section: K E Allstadt Et Al: Observations Of Seasonal and Diurnal mentioning

confidence: 99%

Observations of seasonal and diurnal glacier velocities at Mount Rainier, Washington, using terrestrial radar interferometry

et al. 2015

View full text Add to dashboard Cite

Abstract. We present surface velocity maps derived from repeat terrestrial radar interferometry (TRI) measurements and use these time series to examine seasonal and diurnal dynamics of alpine glaciers at Mount Rainier, Washington. We show that the Nisqually and Emmons glaciers have small slope-parallel velocities near the summit (< 0.2 m day −1 ), high velocities over their upper and central regions (1.0-1.5 m day −1 ), and stagnant debris-covered regions near the terminus (< 0.05 m day −1 ). Velocity uncertainties are as low as ±0.02-0.08 m day −1 . We document a large seasonal velocity decrease of 0.2-0.7 m day −1 (−25 to −50 %) from July to November for most of the Nisqually Glacier, excluding the icefall, suggesting significant seasonal subglacial water storage under most of the glacier. We did not detect diurnal variability above the noise level. Simple 2-D ice flow modeling using TRI velocities suggests that sliding accounts for 91 and 99 % of the July velocity field for the Emmons and Nisqually glaciers with possible ranges of 60-97 and 93-99.5 %, respectively, when considering model uncertainty. We validate our observations against recent in situ velocity measurements and examine the long-term evolution of Nisqually Glacier dynamics through comparisons with historical velocity data. This study shows that repeat TRI measurements with > 10 km range can be used to investigate spatial and temporal variability of alpine glacier dynamics over large areas, including hazardous and inaccessible areas.

show abstract

Short-term surface ice motion variations measured with a ground-based portable real aperture radar interferometer

Cited by 26 publications

References 22 publications

An Intensive Observation of Calving at Helheim Glacier, East Greenland

An Intensive Observation of Calving at Helheim Glacier, East Greenland

Monitoring Alpine glacier surface deformations with GB-SAR

Observations of seasonal and diurnal glacier velocities at Mount Rainier, Washington, using terrestrial radar interferometry

Contact Info

Product

Resources

About