Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland
Glacier velocity is a critical factor closely related to ice dynamics of the Greenland ice sheet (GrIS). We present variations of ice velocity using space-based synthetic aperture radar (SAR) observations from July 2013 to September 2020. We focus on a tidewater outlet glacier of Narsap Sermia (NS),...
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2023
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Online Access: | https://doi.org/10.1080/15481603.2023.2207301 https://doaj.org/article/bef931e5a9d24d61aebb4702f9a60eee |
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ftdoajarticles:oai:doaj.org/article:bef931e5a9d24d61aebb4702f9a60eee 2023-10-09T21:51:44+02:00 Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland Seong-Woo Jung Sang-Hoon Hong 2023-12-01T00:00:00Z https://doi.org/10.1080/15481603.2023.2207301 https://doaj.org/article/bef931e5a9d24d61aebb4702f9a60eee EN eng Taylor & Francis Group http://dx.doi.org/10.1080/15481603.2023.2207301 https://doaj.org/toc/1548-1603 https://doaj.org/toc/1943-7226 1548-1603 1943-7226 doi:10.1080/15481603.2023.2207301 https://doaj.org/article/bef931e5a9d24d61aebb4702f9a60eee GIScience & Remote Sensing, Vol 60, Iss 1 (2023) ice velocity narsap sermia offset tracking sar glacier time series analysis Mathematical geography. Cartography GA1-1776 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.1080/15481603.2023.2207301 2023-09-24T00:36:54Z Glacier velocity is a critical factor closely related to ice dynamics of the Greenland ice sheet (GrIS). We present variations of ice velocity using space-based synthetic aperture radar (SAR) observations from July 2013 to September 2020. We focus on a tidewater outlet glacier of Narsap Sermia (NS), located in southwest Greenland, which is experiencing significant ice loss. A time series of high spatiotemporal resolution maps of ice velocity was traced by using an offset tracking approach with seven-year SAR acquisitions to understand glacier dynamics in time. We observed seasonal variations showing a dramatic increase in late spring (May) and early summer (June) followed by a sharp decrease in late summer (September). The seasonal variation was confirmed through Seasonal and Trend decomposition using Loess (STL) analysis. Overall, the NS glacier experienced a gradual speed-up of ice velocities. The ice velocity increased by 0.1–0.3 km/year from 2015 to 2017, then after a temporary decrease in 2018, the velocity moved faster by 0.9 km/year in 2020. The speed of glacier movement accelerated as it approached the tidal terminus of the glacier, showing approximately 6.0 km/year in 2020. The ice speed in 2020 increased by 0.9 km/year at the terminus region compared with 2014. We also discuss the relationship between the glacier velocity and temperature data such as air, land surface, and sea surface temperatures. Article in Journal/Newspaper glacier Greenland Ice Sheet Tidewater Directory of Open Access Journals: DOAJ Articles Greenland Narsap Sermia ENVELOPE(-49.750,-49.750,64.683,64.683) GIScience & Remote Sensing 60 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ice velocity narsap sermia offset tracking sar glacier time series analysis Mathematical geography. Cartography GA1-1776 Environmental sciences GE1-350 |
spellingShingle |
ice velocity narsap sermia offset tracking sar glacier time series analysis Mathematical geography. Cartography GA1-1776 Environmental sciences GE1-350 Seong-Woo Jung Sang-Hoon Hong Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland |
topic_facet |
ice velocity narsap sermia offset tracking sar glacier time series analysis Mathematical geography. Cartography GA1-1776 Environmental sciences GE1-350 |
description |
Glacier velocity is a critical factor closely related to ice dynamics of the Greenland ice sheet (GrIS). We present variations of ice velocity using space-based synthetic aperture radar (SAR) observations from July 2013 to September 2020. We focus on a tidewater outlet glacier of Narsap Sermia (NS), located in southwest Greenland, which is experiencing significant ice loss. A time series of high spatiotemporal resolution maps of ice velocity was traced by using an offset tracking approach with seven-year SAR acquisitions to understand glacier dynamics in time. We observed seasonal variations showing a dramatic increase in late spring (May) and early summer (June) followed by a sharp decrease in late summer (September). The seasonal variation was confirmed through Seasonal and Trend decomposition using Loess (STL) analysis. Overall, the NS glacier experienced a gradual speed-up of ice velocities. The ice velocity increased by 0.1–0.3 km/year from 2015 to 2017, then after a temporary decrease in 2018, the velocity moved faster by 0.9 km/year in 2020. The speed of glacier movement accelerated as it approached the tidal terminus of the glacier, showing approximately 6.0 km/year in 2020. The ice speed in 2020 increased by 0.9 km/year at the terminus region compared with 2014. We also discuss the relationship between the glacier velocity and temperature data such as air, land surface, and sea surface temperatures. |
format |
Article in Journal/Newspaper |
author |
Seong-Woo Jung Sang-Hoon Hong |
author_facet |
Seong-Woo Jung Sang-Hoon Hong |
author_sort |
Seong-Woo Jung |
title |
Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland |
title_short |
Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland |
title_full |
Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland |
title_fullStr |
Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland |
title_full_unstemmed |
Seven-year variation in glacier surface velocity at Narsap Sermia in Southwest Greenland |
title_sort |
seven-year variation in glacier surface velocity at narsap sermia in southwest greenland |
publisher |
Taylor & Francis Group |
publishDate |
2023 |
url |
https://doi.org/10.1080/15481603.2023.2207301 https://doaj.org/article/bef931e5a9d24d61aebb4702f9a60eee |
long_lat |
ENVELOPE(-49.750,-49.750,64.683,64.683) |
geographic |
Greenland Narsap Sermia |
geographic_facet |
Greenland Narsap Sermia |
genre |
glacier Greenland Ice Sheet Tidewater |
genre_facet |
glacier Greenland Ice Sheet Tidewater |
op_source |
GIScience & Remote Sensing, Vol 60, Iss 1 (2023) |
op_relation |
http://dx.doi.org/10.1080/15481603.2023.2207301 https://doaj.org/toc/1548-1603 https://doaj.org/toc/1943-7226 1548-1603 1943-7226 doi:10.1080/15481603.2023.2207301 https://doaj.org/article/bef931e5a9d24d61aebb4702f9a60eee |
op_doi |
https://doi.org/10.1080/15481603.2023.2207301 |
container_title |
GIScience & Remote Sensing |
container_volume |
60 |
container_issue |
1 |
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1779314842129137664 |