Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream"
This repository contains data documenting ice displacements resulting from a cascade of subglacial drainage outbursts below the Northeast Greenland Ice Stream (NEGIS). The data is presented and analyzed in the manuscript: "Andersen et al. (2023) Episodic Subglacial Drainage Outbursts Below the...
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ftdtufig:oai:figshare.com:article/22060061 2023-05-15T16:27:06+02:00 Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream" Jonas Kvist Andersen Nicholas Rathmann Christine Hvidberg Aslak Grinsted Anders Kusk John Peter Merryman Boncori Jeremie P Mouginot 2023-02-13T08:40:08Z https://doi.org/10.11583/dtu.22060061.v1 https://figshare.com/articles/dataset/Ice_displacement_anomalies_documented_in_Episodic_Subglacial_Drainage_Outbursts_Below_the_Northeast_Greenland_Ice_Stream_/22060061 unknown doi:10.11583/dtu.22060061.v1 https://figshare.com/articles/dataset/Ice_displacement_anomalies_documented_in_Episodic_Subglacial_Drainage_Outbursts_Below_the_Northeast_Greenland_Ice_Stream_/22060061 CC BY 4.0 CC-BY Glaciology subglacial drainage Greenland DInSAR measurements sentinel-1 Dataset 2023 ftdtufig https://doi.org/10.11583/dtu.22060061.v1 2023-02-16T00:12:59Z This repository contains data documenting ice displacements resulting from a cascade of subglacial drainage outbursts below the Northeast Greenland Ice Stream (NEGIS). The data is presented and analyzed in the manuscript: "Andersen et al. (2023) Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream " (submitted to Geophysical Research Letters). The repository contains the following: - UpliftEvents_vlosDiff_T112D.zip a collection of GeoTIFF files, each containing measurements of ice displacement anomalies for a local inferred uplift event. The displacements are measured with the DInSAR (Differential Synthetic Aperture Radar Interferometry) method using Sentinel-1 satellite data. The displacement anomalies are projected to the slanted satellite line-of-sight vector, and are given as a velocity anomaly (in units of meters/year), as this is the output of the applied DInSAR algorithm. Converting the observed line-of-sight anomaly, v LoS , to a vertical displacement, d vert , is then done through: d vert = v LoS / cos(a) * T (1) where a is the local incidence angle of the satellite line-of-sight and T is the temporal baseline (6 days for all measurements). All measurements are from the descending Sentinel-1 track 112. Filenames follow the format "vlosDiff__YYYYMMDD_YYYYMMDD_X.tif", where the two dates reflect the first and second acquisition dates used to make the measurement and X refers to the event number/index (some retrievals contain multiple individual uplift events). Measurements are provided on a 50x50 m grid (EPSG:3413). - T112D_incidence_angle.tif GeoTIFF file containing the incidence angle for Sentinel-1 track 112 over the entire study area (can be used to convert line-of-sight anomaly measurements to vertical displacements, as per eq. (1) above). Provided in 50x50 m grid (EPSG:3413) in units of degrees. - InferredDrainagePathways.zip Subglacial drainage propagation pathways inferred from all DInSAR measurements carried out in the study (cf. Figure 1 of the manuscript). ... Dataset Greenland Technical University of Denmark (DTU): Fighsare Greenland |
institution |
Open Polar |
collection |
Technical University of Denmark (DTU): Fighsare |
op_collection_id |
ftdtufig |
language |
unknown |
topic |
Glaciology subglacial drainage Greenland DInSAR measurements sentinel-1 |
spellingShingle |
Glaciology subglacial drainage Greenland DInSAR measurements sentinel-1 Jonas Kvist Andersen Nicholas Rathmann Christine Hvidberg Aslak Grinsted Anders Kusk John Peter Merryman Boncori Jeremie P Mouginot Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream" |
topic_facet |
Glaciology subglacial drainage Greenland DInSAR measurements sentinel-1 |
description |
This repository contains data documenting ice displacements resulting from a cascade of subglacial drainage outbursts below the Northeast Greenland Ice Stream (NEGIS). The data is presented and analyzed in the manuscript: "Andersen et al. (2023) Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream " (submitted to Geophysical Research Letters). The repository contains the following: - UpliftEvents_vlosDiff_T112D.zip a collection of GeoTIFF files, each containing measurements of ice displacement anomalies for a local inferred uplift event. The displacements are measured with the DInSAR (Differential Synthetic Aperture Radar Interferometry) method using Sentinel-1 satellite data. The displacement anomalies are projected to the slanted satellite line-of-sight vector, and are given as a velocity anomaly (in units of meters/year), as this is the output of the applied DInSAR algorithm. Converting the observed line-of-sight anomaly, v LoS , to a vertical displacement, d vert , is then done through: d vert = v LoS / cos(a) * T (1) where a is the local incidence angle of the satellite line-of-sight and T is the temporal baseline (6 days for all measurements). All measurements are from the descending Sentinel-1 track 112. Filenames follow the format "vlosDiff__YYYYMMDD_YYYYMMDD_X.tif", where the two dates reflect the first and second acquisition dates used to make the measurement and X refers to the event number/index (some retrievals contain multiple individual uplift events). Measurements are provided on a 50x50 m grid (EPSG:3413). - T112D_incidence_angle.tif GeoTIFF file containing the incidence angle for Sentinel-1 track 112 over the entire study area (can be used to convert line-of-sight anomaly measurements to vertical displacements, as per eq. (1) above). Provided in 50x50 m grid (EPSG:3413) in units of degrees. - InferredDrainagePathways.zip Subglacial drainage propagation pathways inferred from all DInSAR measurements carried out in the study (cf. Figure 1 of the manuscript). ... |
format |
Dataset |
author |
Jonas Kvist Andersen Nicholas Rathmann Christine Hvidberg Aslak Grinsted Anders Kusk John Peter Merryman Boncori Jeremie P Mouginot |
author_facet |
Jonas Kvist Andersen Nicholas Rathmann Christine Hvidberg Aslak Grinsted Anders Kusk John Peter Merryman Boncori Jeremie P Mouginot |
author_sort |
Jonas Kvist Andersen |
title |
Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream" |
title_short |
Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream" |
title_full |
Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream" |
title_fullStr |
Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream" |
title_full_unstemmed |
Ice displacement anomalies documented in "Episodic Subglacial Drainage Outbursts Below the Northeast Greenland Ice Stream" |
title_sort |
ice displacement anomalies documented in "episodic subglacial drainage outbursts below the northeast greenland ice stream" |
publishDate |
2023 |
url |
https://doi.org/10.11583/dtu.22060061.v1 https://figshare.com/articles/dataset/Ice_displacement_anomalies_documented_in_Episodic_Subglacial_Drainage_Outbursts_Below_the_Northeast_Greenland_Ice_Stream_/22060061 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_relation |
doi:10.11583/dtu.22060061.v1 https://figshare.com/articles/dataset/Ice_displacement_anomalies_documented_in_Episodic_Subglacial_Drainage_Outbursts_Below_the_Northeast_Greenland_Ice_Stream_/22060061 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.11583/dtu.22060061.v1 |
_version_ |
1766016157260709888 |