Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data
Pine Island Glacier (PIG) in West Antarctica drains out to the Amundsen Sea through Pine Island Glacier Ice Shelf (PIGIS). As changes in ice velocities on PIGIS are strongly linked to changes in ice mass discharge from the West Antarctic Ice Sheet, it is very important to evaluate the spatiotemporal...
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Online Access: | https://scholarworks.unist.ac.kr/handle/201301/20476 https://doi.org/10.1016/j.rse.2016.09.001 http://www.sciencedirect.com/science/article/pii/S0034425716303443 |
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ftuisanist:oai:scholarworks.unist.ac.kr:201301/20476 2023-05-15T13:24:18+02:00 Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data Han, Hyangsun Im, Jungho Kim, Hyun-cheol 2016-12 https://scholarworks.unist.ac.kr/handle/201301/20476 https://doi.org/10.1016/j.rse.2016.09.001 http://www.sciencedirect.com/science/article/pii/S0034425716303443 ?????? unknown ELSEVIER SCIENCE INC REMOTE SENSING OF ENVIRONMENT, v.186, pp.358 - 371 0034-4257 https://scholarworks.unist.ac.kr/handle/201301/20476 1204 26896 2-s2.0-84986592984 000396382500028 doi:10.1016/j.rse.2016.09.001 http://www.sciencedirect.com/science/article/pii/S0034425716303443 ARTICLE ART 2016 ftuisanist https://doi.org/10.1016/j.rse.2016.09.001 2022-05-15T05:27:39Z Pine Island Glacier (PIG) in West Antarctica drains out to the Amundsen Sea through Pine Island Glacier Ice Shelf (PIGIS). As changes in ice velocities on PIGIS are strongly linked to changes in ice mass discharge from the West Antarctic Ice Sheet, it is very important to evaluate the spatiotemporal variations in ice velocities on the ice shelf. This research estimated ice velocities of PIGIS from an ensemble of image matching of Landsat time series multispectral data obtained from 2000 to 2014. Orientation correlation was adopted for the image matching of blue, green, red, near infrared, panchromatic, and the first principal image of the Landsat multispectral data, from which the results were combined and averaged. The multispectral image matching proposed in this research produced similar to 35% more ice velocity vectors than the use of a single band (i.e., panchromatic band) image matching. The erroneous matches were filtered through simple but rigorous statistical evaluations. The ice velocity of PIGIS accelerated by similar to 55% during 2000-2010, and the acceleration of the image northing velocity component (similar to 13 km a(-1)) was higher than that of the image easting velocity component (similar to 0.8 km a-1). During 20102012, the ice velocity of PIGIS slowed down by similar to 10%. The ice velocity in 2014 increased by 5% from 2012, but was still lower than the peak values observed in 2010. The surface strain rate fields of PIGIS were derived from the ice velocity fields. The longitudinal ice compression was observed near the grounding line and the geographically northern part of the central ice shelf of PIGIS, while a fast-flowing band was observed near the southern margin of the ice shelf. The transverse strain rate showed that ice divergence in the hinge zone of the central ice shelf has increased since 2000. The width of the shear margins of the central ice shelf of PIGIS is similar to 25 km, which has been stable since 2000. close Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier West Antarctica ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) Amundsen Sea Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctic Ice Sheet West Antarctica Remote Sensing of Environment 186 358 371 |
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Open Polar |
collection |
ScholarWorks@UNIST (Ulsan National Institute of Science and Technology) |
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ftuisanist |
language |
unknown |
description |
Pine Island Glacier (PIG) in West Antarctica drains out to the Amundsen Sea through Pine Island Glacier Ice Shelf (PIGIS). As changes in ice velocities on PIGIS are strongly linked to changes in ice mass discharge from the West Antarctic Ice Sheet, it is very important to evaluate the spatiotemporal variations in ice velocities on the ice shelf. This research estimated ice velocities of PIGIS from an ensemble of image matching of Landsat time series multispectral data obtained from 2000 to 2014. Orientation correlation was adopted for the image matching of blue, green, red, near infrared, panchromatic, and the first principal image of the Landsat multispectral data, from which the results were combined and averaged. The multispectral image matching proposed in this research produced similar to 35% more ice velocity vectors than the use of a single band (i.e., panchromatic band) image matching. The erroneous matches were filtered through simple but rigorous statistical evaluations. The ice velocity of PIGIS accelerated by similar to 55% during 2000-2010, and the acceleration of the image northing velocity component (similar to 13 km a(-1)) was higher than that of the image easting velocity component (similar to 0.8 km a-1). During 20102012, the ice velocity of PIGIS slowed down by similar to 10%. The ice velocity in 2014 increased by 5% from 2012, but was still lower than the peak values observed in 2010. The surface strain rate fields of PIGIS were derived from the ice velocity fields. The longitudinal ice compression was observed near the grounding line and the geographically northern part of the central ice shelf of PIGIS, while a fast-flowing band was observed near the southern margin of the ice shelf. The transverse strain rate showed that ice divergence in the hinge zone of the central ice shelf has increased since 2000. The width of the shear margins of the central ice shelf of PIGIS is similar to 25 km, which has been stable since 2000. close |
format |
Article in Journal/Newspaper |
author |
Han, Hyangsun Im, Jungho Kim, Hyun-cheol |
spellingShingle |
Han, Hyangsun Im, Jungho Kim, Hyun-cheol Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data |
author_facet |
Han, Hyangsun Im, Jungho Kim, Hyun-cheol |
author_sort |
Han, Hyangsun |
title |
Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data |
title_short |
Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data |
title_full |
Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data |
title_fullStr |
Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data |
title_full_unstemmed |
Variations in ice velocities of Pine Island Glacier Ice Shelf evaluated using multispectral image matching of Landsat time series data |
title_sort |
variations in ice velocities of pine island glacier ice shelf evaluated using multispectral image matching of landsat time series data |
publisher |
ELSEVIER SCIENCE INC |
publishDate |
2016 |
url |
https://scholarworks.unist.ac.kr/handle/201301/20476 https://doi.org/10.1016/j.rse.2016.09.001 http://www.sciencedirect.com/science/article/pii/S0034425716303443 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Amundsen Sea Antarctic Pine Island Glacier West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Pine Island Glacier West Antarctic Ice Sheet West Antarctica |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Glacier West Antarctica |
op_relation |
REMOTE SENSING OF ENVIRONMENT, v.186, pp.358 - 371 0034-4257 https://scholarworks.unist.ac.kr/handle/201301/20476 1204 26896 2-s2.0-84986592984 000396382500028 doi:10.1016/j.rse.2016.09.001 http://www.sciencedirect.com/science/article/pii/S0034425716303443 |
op_doi |
https://doi.org/10.1016/j.rse.2016.09.001 |
container_title |
Remote Sensing of Environment |
container_volume |
186 |
container_start_page |
358 |
op_container_end_page |
371 |
_version_ |
1766378659392782336 |