ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results
For more than two decades, radar altimetry missions have provided continuous elevation estimates of the Greenland ice sheet (GrIS). Here, we propose a method for using such data to estimate ice-sheet-wide surface elevation changes (SECs). The final data set will be based on observations acquired fro...
Published in: | International Journal of Remote Sensing |
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2015
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Online Access: | https://eprints.whiterose.ac.uk/92411/ https://eprints.whiterose.ac.uk/92411/1/tRES_JFL_subm_281014.pdf https://doi.org/10.1080/01431161.2014.999385 |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:92411 2023-05-15T16:27:47+02:00 ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results Levinsen, JF Khvorostovsky, K Ticconi, F Shepherd, A Forsberg, R Sorensen, LS Muir, A Pie, N Felikson, D Flament, T Hurkmans, R Moholdt, G Gunter, B Lindenbergh, RC Kleinherenbrink, M 2015 text https://eprints.whiterose.ac.uk/92411/ https://eprints.whiterose.ac.uk/92411/1/tRES_JFL_subm_281014.pdf https://doi.org/10.1080/01431161.2014.999385 en eng Taylor & Francis https://eprints.whiterose.ac.uk/92411/1/tRES_JFL_subm_281014.pdf Levinsen, JF, Khvorostovsky, K, Ticconi, F et al. (12 more authors) (2015) ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results. International Journal of Remote Sensing, 36 (2). pp. 551-573. ISSN 0143-1161 Article NonPeerReviewed 2015 ftleedsuniv https://doi.org/10.1080/01431161.2014.999385 2023-01-30T21:37:06Z For more than two decades, radar altimetry missions have provided continuous elevation estimates of the Greenland ice sheet (GrIS). Here, we propose a method for using such data to estimate ice-sheet-wide surface elevation changes (SECs). The final data set will be based on observations acquired from the European Space Agency’s Environmental Satellite (ENVISAT), European Remote Sensing (ERS)-1 and -2, CryoSat-2, and, in the longer term, Sentinel-3 satellites. In order to find the best-performing method, an intercomparison exercise has been carried out in which the scientific community was asked to provide their best SEC estimates as well as feedback sheets describing the applied method. Due to the hitherto few radar-based SEC analyses as well as the higher accuracy of laser data, the participants were asked to use either ENVISAT radar or ICESat (Ice, Cloud, and land Elevation Satellite) laser altimetry over the Jakobshavn Isbræ drainage basin. The submissions were validated against airborne laser-scanner data, and intercomparisons were carried out to analyse the potential of the applied methods and to find whether the two altimeters were capable of resolving the same signal. The analyses found great potential of the applied repeat-track and cross-over techniques, and, for the first time over Greenland, that repeat-track analyses from radar altimetry agreed well with laser data. Since topography-related errors can be neglected in cross-over analyses, it is expected that the most accurate, ice-sheet-wide SEC estimates are obtained by combining the cross-over and repeat-track techniques. It is thus possible to exploit the high accuracy of the former and the large spatial data coverage of the latter. Based on CryoSat’s different operation modes, and the increased spatial and temporal data coverage, this shows good potential for a future inclusion of CryoSat-2 and Sentinel-3 data to continuously obtain accurate SEC estimates both in the interior and margin ice sheet. Article in Journal/Newspaper Greenland Ice Sheet Jakobshavn Jakobshavn isbræ White Rose Research Online (Universities of Leeds, Sheffield & York) Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) International Journal of Remote Sensing 36 2 551 573 |
institution |
Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
op_collection_id |
ftleedsuniv |
language |
English |
description |
For more than two decades, radar altimetry missions have provided continuous elevation estimates of the Greenland ice sheet (GrIS). Here, we propose a method for using such data to estimate ice-sheet-wide surface elevation changes (SECs). The final data set will be based on observations acquired from the European Space Agency’s Environmental Satellite (ENVISAT), European Remote Sensing (ERS)-1 and -2, CryoSat-2, and, in the longer term, Sentinel-3 satellites. In order to find the best-performing method, an intercomparison exercise has been carried out in which the scientific community was asked to provide their best SEC estimates as well as feedback sheets describing the applied method. Due to the hitherto few radar-based SEC analyses as well as the higher accuracy of laser data, the participants were asked to use either ENVISAT radar or ICESat (Ice, Cloud, and land Elevation Satellite) laser altimetry over the Jakobshavn Isbræ drainage basin. The submissions were validated against airborne laser-scanner data, and intercomparisons were carried out to analyse the potential of the applied methods and to find whether the two altimeters were capable of resolving the same signal. The analyses found great potential of the applied repeat-track and cross-over techniques, and, for the first time over Greenland, that repeat-track analyses from radar altimetry agreed well with laser data. Since topography-related errors can be neglected in cross-over analyses, it is expected that the most accurate, ice-sheet-wide SEC estimates are obtained by combining the cross-over and repeat-track techniques. It is thus possible to exploit the high accuracy of the former and the large spatial data coverage of the latter. Based on CryoSat’s different operation modes, and the increased spatial and temporal data coverage, this shows good potential for a future inclusion of CryoSat-2 and Sentinel-3 data to continuously obtain accurate SEC estimates both in the interior and margin ice sheet. |
format |
Article in Journal/Newspaper |
author |
Levinsen, JF Khvorostovsky, K Ticconi, F Shepherd, A Forsberg, R Sorensen, LS Muir, A Pie, N Felikson, D Flament, T Hurkmans, R Moholdt, G Gunter, B Lindenbergh, RC Kleinherenbrink, M |
spellingShingle |
Levinsen, JF Khvorostovsky, K Ticconi, F Shepherd, A Forsberg, R Sorensen, LS Muir, A Pie, N Felikson, D Flament, T Hurkmans, R Moholdt, G Gunter, B Lindenbergh, RC Kleinherenbrink, M ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results |
author_facet |
Levinsen, JF Khvorostovsky, K Ticconi, F Shepherd, A Forsberg, R Sorensen, LS Muir, A Pie, N Felikson, D Flament, T Hurkmans, R Moholdt, G Gunter, B Lindenbergh, RC Kleinherenbrink, M |
author_sort |
Levinsen, JF |
title |
ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results |
title_short |
ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results |
title_full |
ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results |
title_fullStr |
ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results |
title_full_unstemmed |
ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results |
title_sort |
esa ice sheet cci: derivation of the optimal method for surface elevation change detection of the greenland ice sheet - round robin results |
publisher |
Taylor & Francis |
publishDate |
2015 |
url |
https://eprints.whiterose.ac.uk/92411/ https://eprints.whiterose.ac.uk/92411/1/tRES_JFL_subm_281014.pdf https://doi.org/10.1080/01431161.2014.999385 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Greenland Jakobshavn Isbræ |
geographic_facet |
Greenland Jakobshavn Isbræ |
genre |
Greenland Ice Sheet Jakobshavn Jakobshavn isbræ |
genre_facet |
Greenland Ice Sheet Jakobshavn Jakobshavn isbræ |
op_relation |
https://eprints.whiterose.ac.uk/92411/1/tRES_JFL_subm_281014.pdf Levinsen, JF, Khvorostovsky, K, Ticconi, F et al. (12 more authors) (2015) ESA ice sheet CCI: derivation of the optimal method for surface elevation change detection of the Greenland ice sheet - round robin results. International Journal of Remote Sensing, 36 (2). pp. 551-573. ISSN 0143-1161 |
op_doi |
https://doi.org/10.1080/01431161.2014.999385 |
container_title |
International Journal of Remote Sensing |
container_volume |
36 |
container_issue |
2 |
container_start_page |
551 |
op_container_end_page |
573 |
_version_ |
1766017303560847360 |