Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data
Compared to the western and southern parts of the Greenland ice sheet, where narrow tidewater and land terminating glaciers dominate, the north-eastern part is characterized by a major ice stream, the North-East Greenland Ice Stream (NEGIS), which drains about 8% of the ice sheet via three outlet gl...
Main Authors: | , , , , |
---|---|
Format: | Conference Object |
Language: | unknown |
Published: |
2016
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/40898/ https://epic.awi.de/id/eprint/40898/1/nneckel_Poster_Prag_final.pdf https://hdl.handle.net/10013/epic.47918 https://hdl.handle.net/10013/epic.47918.d001 |
id |
ftawi:oai:epic.awi.de:40898 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:40898 2024-09-15T18:04:15+00:00 Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data Neckel, Niklas Helm, Veit Humbert, Angelika Rosenau, Ralf Ebermann, Benjamin 2016 application/pdf https://epic.awi.de/id/eprint/40898/ https://epic.awi.de/id/eprint/40898/1/nneckel_Poster_Prag_final.pdf https://hdl.handle.net/10013/epic.47918 https://hdl.handle.net/10013/epic.47918.d001 unknown https://epic.awi.de/id/eprint/40898/1/nneckel_Poster_Prag_final.pdf https://hdl.handle.net/10013/epic.47918.d001 Neckel, N. orcid:0000-0003-4300-5488 , Helm, V. orcid:0000-0001-7788-9328 , Humbert, A. , Rosenau, R. and Ebermann, B. (2016) Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data , ESA Living Planet Symposium, Prague, Czech Republic, 9 May 2016 - 13 May 2016 . hdl:10013/epic.47918 EPIC3ESA Living Planet Symposium, Prague, Czech Republic, 2016-05-09-2016-05-13 Conference notRev 2016 ftawi 2024-06-24T04:14:20Z Compared to the western and southern parts of the Greenland ice sheet, where narrow tidewater and land terminating glaciers dominate, the north-eastern part is characterized by a major ice stream, the North-East Greenland Ice Stream (NEGIS), which drains about 8% of the ice sheet via three outlet glaciers. While the mass loss of the ice sheet was most prominent in the southern and western areas in the past decade, within the past few years also the north-eastern part showed changes. Therefore, a continuous monitoring of surface velocities of the large outlet glaciers Nioghalvfjerdsfjorden (79 NG) and Zachariae Isstrøm (ZIS) is intended. For this purpose we make use of Sentinel-1a data, aiming at near real time velocity measurements. Surface velocities are calculated for every 12-day and 24-day repeat pass by means of offset intensity tracking. Here we make use of Terrain Observation with Progressive Scans SAR (TOPSAR) Single Look Complex (SLC) data and precise orbit information. In order to achieve robust velocity fields and to close data gaps, offset tracking results are stacked on a monthly basis resulting in a continuous time series of velocity measurements since December 2014. Conference Object East Greenland Greenland Ice Sheet Nioghalvfjerdsfjorden Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Compared to the western and southern parts of the Greenland ice sheet, where narrow tidewater and land terminating glaciers dominate, the north-eastern part is characterized by a major ice stream, the North-East Greenland Ice Stream (NEGIS), which drains about 8% of the ice sheet via three outlet glaciers. While the mass loss of the ice sheet was most prominent in the southern and western areas in the past decade, within the past few years also the north-eastern part showed changes. Therefore, a continuous monitoring of surface velocities of the large outlet glaciers Nioghalvfjerdsfjorden (79 NG) and Zachariae Isstrøm (ZIS) is intended. For this purpose we make use of Sentinel-1a data, aiming at near real time velocity measurements. Surface velocities are calculated for every 12-day and 24-day repeat pass by means of offset intensity tracking. Here we make use of Terrain Observation with Progressive Scans SAR (TOPSAR) Single Look Complex (SLC) data and precise orbit information. In order to achieve robust velocity fields and to close data gaps, offset tracking results are stacked on a monthly basis resulting in a continuous time series of velocity measurements since December 2014. |
format |
Conference Object |
author |
Neckel, Niklas Helm, Veit Humbert, Angelika Rosenau, Ralf Ebermann, Benjamin |
spellingShingle |
Neckel, Niklas Helm, Veit Humbert, Angelika Rosenau, Ralf Ebermann, Benjamin Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data |
author_facet |
Neckel, Niklas Helm, Veit Humbert, Angelika Rosenau, Ralf Ebermann, Benjamin |
author_sort |
Neckel, Niklas |
title |
Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data |
title_short |
Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data |
title_full |
Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data |
title_fullStr |
Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data |
title_full_unstemmed |
Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data |
title_sort |
near real time surface velocity measurements of north-east greenland ice stream outlet glaciers from sentinel-1a data |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/40898/ https://epic.awi.de/id/eprint/40898/1/nneckel_Poster_Prag_final.pdf https://hdl.handle.net/10013/epic.47918 https://hdl.handle.net/10013/epic.47918.d001 |
genre |
East Greenland Greenland Ice Sheet Nioghalvfjerdsfjorden |
genre_facet |
East Greenland Greenland Ice Sheet Nioghalvfjerdsfjorden |
op_source |
EPIC3ESA Living Planet Symposium, Prague, Czech Republic, 2016-05-09-2016-05-13 |
op_relation |
https://epic.awi.de/id/eprint/40898/1/nneckel_Poster_Prag_final.pdf https://hdl.handle.net/10013/epic.47918.d001 Neckel, N. orcid:0000-0003-4300-5488 , Helm, V. orcid:0000-0001-7788-9328 , Humbert, A. , Rosenau, R. and Ebermann, B. (2016) Near real time surface velocity measurements of North-East Greenland Ice Stream outlet glaciers from Sentinel-1A data , ESA Living Planet Symposium, Prague, Czech Republic, 9 May 2016 - 13 May 2016 . hdl:10013/epic.47918 |
_version_ |
1810441751568056320 |