Glacier velocity measurements in the eastern Yigong Zangbo basin, Tibet, China

Ke, Chang‐Qing; Kou, Cheng; Ludwig, Ralf; Qin, Xiang

doi:10.3189/2013jog12j234

Cited by 22 publications

(25 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The changes in velocity cross the flow line reveals that ice near the side-wall of the surrounding mountain becomes slow or even motionless due to lateral and bottom friction. Generally, the maximum ice flow velocity across the glacier can be achieved around the central flowline from the side-walls [3]. Similar phenomena are also observed in other large, wide glaciers [24,25].…”

Section: Results and Analysissupporting

confidence: 58%

“…Pixel-tracking is a useful method for obtaining glacier velocity measurements using SAR imagery, especially under difficult geographic conditions [4,22]. The integration of SAR remote-sensing and regular in situ measurements of representative glaciers in the eastern Pamirs is therefore highly valuable and recommended for future glaciological research in the context of climate warming [3].…”

Section: Discussionmentioning

confidence: 99%

“…Such residual errors could be easily eliminated with linear or polynomial regression. Then, a smooth filter was employed to eliminate the noise in the displacement result, based on the combined constraints on modulus threshold and flow direction [3].…”

Section: Dem-assisted Topographic Effect Removalmentioning

confidence: 99%

“…Therefore, knowledge of the glaciers' surface velocity fields is highly significant in understanding the response of glaciers and ice caps to climate changes and predicting glacier-related hazards [3,15]. Given the poor spatial sampling and difficulty of monitoring glaciers directly in remote regions by fieldwork, satellite remote sensing presents an attractive alternative for efficiently monitoring velocities with optical and radar imagery [9,[16][17][18].…”

Section: Introductionmentioning

confidence: 99%

“…Glaciers, especially mountain glaciers, are usually treated as one of the most sensitive indicators of the Earth's climate change, which has always been characterized by natural variability such as global annual air temperature and average precipitation [1][2][3][4]. The former shows significant increase during the last century [5,6].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Accurate Determination of Glacier Surface Velocity Fields with a DEM-Assisted Pixel-Tracking Technique from SAR Imagery

et al. 2015

View full text Add to dashboard Cite

Abstract:We obtained accurate, detailed motion distribution of glaciers in Central Asia by applying digital elevation model (DEM) assisted pixel-tracking method to L-band synthetic aperture radar imagery. The paper firstly introduces and analyzes each component of the offset field briefly, and then describes the method used to efficiently and precisely compensate the topography-related offset caused by the large spatial baseline and rugged terrain with the help of DEM. The results indicate that the rugged topography not only forms the complex shapes of glaciers, but also affects the glacier velocity estimation, especially with large spatial baseline. The maximum velocity, 0.85 m•d −1 , was observed in the middle part on the Fedchenko Glacier, which is the world's longest mountain glacier. The motion fluctuation on its main trunk is apparently influenced by mass flowing in from tributaries, as well as angles between tributaries and the main stream. The approach presented in this paper was proved to be highly appropriate for monitoring glacier motion and will provide valuable sensitive indicators of current and future climate change for environmental analysis.

show abstract

Section: Results and Analysissupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Dem-assisted Topographic Effect Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Accurate Determination of Glacier Surface Velocity Fields with a DEM-Assisted Pixel-Tracking Technique from SAR Imagery

et al. 2015

View full text Add to dashboard Cite

show abstract

Rathong glacier’s Line-Of-Sight (LOS) Velocity Measured Using the Modified Four-Pass DInSAR Technique

Kangjam,

Singh,

Singh

et al. 2023

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Surface velocity estimations of ice shelves in the northern Antarctic Peninsula derived from MODIS data

Zhou

Shao

et al. 2015

J. Geogr. Sci.

View full text Add to dashboard Cite

The ice shelves in the northern Antarctic Peninsula are highly sensitive to variations of temperature and have therefore served as indicators of global warming. In this study, we estimate the velocities of the ice shelves in the northern Antarctic Peninsula using co-registration of optically sensed images and correlation module (COSI-Corr) in the Environment for Visualizing Images (ENVI) based on Moderate Resolution Imaging Spectroradiometer (MODIS) images during 2000-2012, from which we conclude that the ice flow directions generally match the peninsulas pattern and the crevasse, ice flows mainly eastward into the Weddell Sea. The spatial pattern of velocity field exhibits an increasing trend from the western grounding line to the maximum at the middle part of the ice shelf front on Larsen C with a velocity of approximately 700 ma-1 , and the velocity field shows relatively higher values in its southerly neighboring ice shelf (e.g. Smith Inlet). Additionally, ice flows are relatively quicker in the outer part of the ice shelf than in the inner parts. Temporal changes in surface velocities show a continuous increase from 2000 to 2012. It is worth noting that, the accel

show abstract

Glacier velocity measurements in the eastern Yigong Zangbo basin, Tibet, China

Cited by 22 publications

References 52 publications

Accurate Determination of Glacier Surface Velocity Fields with a DEM-Assisted Pixel-Tracking Technique from SAR Imagery

Accurate Determination of Glacier Surface Velocity Fields with a DEM-Assisted Pixel-Tracking Technique from SAR Imagery

Rathong glacier’s Line-Of-Sight (LOS) Velocity Measured Using the Modified Four-Pass DInSAR Technique

Surface velocity estimations of ice shelves in the northern Antarctic Peninsula derived from MODIS data

Contact Info

Product

Resources

About