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Analysis of the Velocity Changes of the Jakobshavn Glacier Based on SAR Imagery Cover

Analysis of the Velocity Changes of the Jakobshavn Glacier Based on SAR Imagery

Quaestiones Geographicae
Volume 41 (2022): Issue 1 (March 2022)
By: Magdalena Łukosz,  Ryszard Hejmanowski and  Wojciech T. Witkowski  
Open Access
|Mar 2022

Figures & Tables

Fig. 1

Location of the area of interest (AOI): A) position of the Jakobshavn glacier on the Greenland map, B) precise location of the glacier near Kangia Bay.
Location of the area of interest (AOI): A) position of the Jakobshavn glacier on the Greenland map, B) precise location of the glacier near Kangia Bay.

Fig. 2

Velocities of the Jakobshavn Glacier from the MEaSUREs database.
Velocities of the Jakobshavn Glacier from the MEaSUREs database.

Fig. 3

Workflow.
Workflow.

Fig. 4

Velocities for winter 2017 obtained from short and long intervals.
Velocities for winter 2017 obtained from short and long intervals.

Fig. 5

Correlation plots for winter 2017.
Correlation plots for winter 2017.

Fig. 6

Velocities for summer 2017 obtained from long and short calculation intervals.
Velocities for summer 2017 obtained from long and short calculation intervals.

Fig. 7

Correlation plots for summer 2017.
Correlation plots for summer 2017.

Fig. 8

Velocities of the Jakobshavn Glacier in winter and summer 2021.
Velocities of the Jakobshavn Glacier in winter and summer 2021.

Fig. 9

Location of profiles.
Location of profiles.

Fig. 10

Winter profiles presenting velocity values.
Winter profiles presenting velocity values.

Fig. 11

Summer profiles presenting velocity values.
Summer profiles presenting velocity values.

Description of data used in the study_

No.Data of image acquisitionOrbit numberTime baseline [days]Period
131.01.201712716Winter 2017
06.02.2017127
231.01.201712724
24.02.2017127
330.07.20171276August 2017
05.08.2017127
430.07.201712730
29.08.2017127
503.01.2021256Winter 2021
09.01.202125
601.08.2021256August 2021
07.08.202125

Parameters for the offset-tracking procedure_

Parameters
DTMACE30
Grid size20 × 20 pxl (200 × 200 m)
Searching window128 × 128 pxl
Max velocity40 m d−1
DOI: https://doi.org/10.2478/quageo-2022-0007 | Journal eISSN: 2081-6383 | Journal ISSN: 2082-2103
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Language: English
Page range: 93 - 105
Submitted on: Oct 14, 2021
Published on: Mar 19, 2022
Published by: Adam Mickiewicz University
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
marine-terminating glacier,
offset-tracking,
SAR imagery,
glacier surface velocity,
temporal changes in dynamics
Related subjects:
Geosciences,
Geography

© 2022 Magdalena Łukosz, Ryszard Hejmanowski, Wojciech T. Witkowski, published by Adam Mickiewicz University
This work is licensed under the Creative Commons Attribution 4.0 License.

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