Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data
The accurate estimations of Greenland ice sheet (GrIS) contribution to sea-level rise require a comprehensive analysis of ice flow dynamic responses to subglacial hydrology, which is currently lacking. Questions arise about how subglacial meltwater affects glacier velocity. The main objective of thi...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5021285 2023-07-30T04:03:36+02:00 Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data Nela, B. Singh, G. Gundu, S. 2023-07-11 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021285 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4883 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021285 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-4883 2023-07-16T23:40:25Z The accurate estimations of Greenland ice sheet (GrIS) contribution to sea-level rise require a comprehensive analysis of ice flow dynamic responses to subglacial hydrology, which is currently lacking. Questions arise about how subglacial meltwater affects glacier velocity. The main objective of this study is to observe the influence of the subglacial hydrology system on Kangerlussuup Sermia glacier (Central-West Greenland) velocity through the time series analysis. The previous studies categorized GrIS glaciers into 3 types based on their seasonal velocity changes. However, these studies are still inadequate for a complete understanding of spatial channel distribution. The current study mainly observed the variations in velocity along the glacier flowline of 10km length from the snout position, which are predominantly important to observe the spatial basal hydrology channel distributions and ocean water circulation. We used 13 pairs of Sentinel-1 SAR dataset (from January-2022 to January-2023) and observed the every month velocity changes. The maximum velocity rates are observed during the early summer season due to the increment of subglacial water pressure from the surface meltwater. Later, the deceleration observed from July to August, and the velocity rates are constant during most of the melt season due to the drainage channels becoming more channelized. Although maximum surface velocities observed at the snout (nearly 5.5 m/day), the deceleration rate from July to August is (≈15m in 35 days) is constant throughout 10km profile. Our results reveal that spatial distribution of the drainage pattern is same for the selected profile length of the Kangerlussuup Sermia glacier. Conference Object glacier Greenland Ice Sheet GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Greenland The Sentinel ENVELOPE(73.317,73.317,-52.983,-52.983) |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
The accurate estimations of Greenland ice sheet (GrIS) contribution to sea-level rise require a comprehensive analysis of ice flow dynamic responses to subglacial hydrology, which is currently lacking. Questions arise about how subglacial meltwater affects glacier velocity. The main objective of this study is to observe the influence of the subglacial hydrology system on Kangerlussuup Sermia glacier (Central-West Greenland) velocity through the time series analysis. The previous studies categorized GrIS glaciers into 3 types based on their seasonal velocity changes. However, these studies are still inadequate for a complete understanding of spatial channel distribution. The current study mainly observed the variations in velocity along the glacier flowline of 10km length from the snout position, which are predominantly important to observe the spatial basal hydrology channel distributions and ocean water circulation. We used 13 pairs of Sentinel-1 SAR dataset (from January-2022 to January-2023) and observed the every month velocity changes. The maximum velocity rates are observed during the early summer season due to the increment of subglacial water pressure from the surface meltwater. Later, the deceleration observed from July to August, and the velocity rates are constant during most of the melt season due to the drainage channels becoming more channelized. Although maximum surface velocities observed at the snout (nearly 5.5 m/day), the deceleration rate from July to August is (≈15m in 35 days) is constant throughout 10km profile. Our results reveal that spatial distribution of the drainage pattern is same for the selected profile length of the Kangerlussuup Sermia glacier. |
format |
Conference Object |
author |
Nela, B. Singh, G. Gundu, S. |
spellingShingle |
Nela, B. Singh, G. Gundu, S. Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data |
author_facet |
Nela, B. Singh, G. Gundu, S. |
author_sort |
Nela, B. |
title |
Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data |
title_short |
Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data |
title_full |
Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data |
title_fullStr |
Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data |
title_full_unstemmed |
Observing the Greenland Glacier Subglacial Hydrology Network with the Surface Velocities using the Sentinel-1 Spaceborne SAR data |
title_sort |
observing the greenland glacier subglacial hydrology network with the surface velocities using the sentinel-1 spaceborne sar data |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021285 |
long_lat |
ENVELOPE(73.317,73.317,-52.983,-52.983) |
geographic |
Greenland The Sentinel |
geographic_facet |
Greenland The Sentinel |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-4883 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021285 |
op_doi |
https://doi.org/10.57757/IUGG23-4883 |
_version_ |
1772814636301680640 |