A new digital elevation model of Antarctica derived from CryoSat-2 altimetry
We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5 × 108 observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016. The DEM is formed from spatio-temporal fits to elevation measurements accumulated within 1, 2...
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Copernicus Publications
2018
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fttriple:oai:gotriple.eu:oai:doaj.org/article:6b77e331fed14aef8f4482e8d15fd1ab 2023-05-15T13:57:58+02:00 A new digital elevation model of Antarctica derived from CryoSat-2 altimetry T. Slater A. Shepherd M. McMillan A. Muir L. Gilbert A. E. Hogg H. Konrad T. Parrinello 2018-05-01 https://doi.org/10.5194/tc-12-1551-2018 https://www.the-cryosphere.net/12/1551/2018/tc-12-1551-2018.pdf https://doaj.org/article/6b77e331fed14aef8f4482e8d15fd1ab en eng Copernicus Publications doi:10.5194/tc-12-1551-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/1551/2018/tc-12-1551-2018.pdf https://doaj.org/article/6b77e331fed14aef8f4482e8d15fd1ab undefined The Cryosphere, Vol 12, Pp 1551-1562 (2018) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.5194/tc-12-1551-2018 2023-01-22T17:50:35Z We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5 × 108 observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016. The DEM is formed from spatio-temporal fits to elevation measurements accumulated within 1, 2, and 5 km grid cells, and is posted at the modal resolution of 1 km. Altogether, 94 % of the grounded ice sheet and 98 % of the floating ice shelves are observed, and the remaining grid cells north of 88° S are interpolated using ordinary kriging. The median and root mean square difference between the DEM and 2.3 × 107 airborne laser altimeter measurements acquired during NASA Operation IceBridge campaigns are −0.30 and 13.50 m, respectively. The DEM uncertainty rises in regions of high slope, especially where elevation measurements were acquired in low-resolution mode; taking this into account, we estimate the average accuracy to be 9.5 m – a value that is comparable to or better than that of other models derived from satellite radar and laser altimetry. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelves The Cryosphere Unknown Antarctic The Antarctic The Cryosphere 12 4 1551 1562 |
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geo envir T. Slater A. Shepherd M. McMillan A. Muir L. Gilbert A. E. Hogg H. Konrad T. Parrinello A new digital elevation model of Antarctica derived from CryoSat-2 altimetry |
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geo envir |
description |
We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5 × 108 observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016. The DEM is formed from spatio-temporal fits to elevation measurements accumulated within 1, 2, and 5 km grid cells, and is posted at the modal resolution of 1 km. Altogether, 94 % of the grounded ice sheet and 98 % of the floating ice shelves are observed, and the remaining grid cells north of 88° S are interpolated using ordinary kriging. The median and root mean square difference between the DEM and 2.3 × 107 airborne laser altimeter measurements acquired during NASA Operation IceBridge campaigns are −0.30 and 13.50 m, respectively. The DEM uncertainty rises in regions of high slope, especially where elevation measurements were acquired in low-resolution mode; taking this into account, we estimate the average accuracy to be 9.5 m – a value that is comparable to or better than that of other models derived from satellite radar and laser altimetry. |
format |
Article in Journal/Newspaper |
author |
T. Slater A. Shepherd M. McMillan A. Muir L. Gilbert A. E. Hogg H. Konrad T. Parrinello |
author_facet |
T. Slater A. Shepherd M. McMillan A. Muir L. Gilbert A. E. Hogg H. Konrad T. Parrinello |
author_sort |
T. Slater |
title |
A new digital elevation model of Antarctica derived from CryoSat-2 altimetry |
title_short |
A new digital elevation model of Antarctica derived from CryoSat-2 altimetry |
title_full |
A new digital elevation model of Antarctica derived from CryoSat-2 altimetry |
title_fullStr |
A new digital elevation model of Antarctica derived from CryoSat-2 altimetry |
title_full_unstemmed |
A new digital elevation model of Antarctica derived from CryoSat-2 altimetry |
title_sort |
new digital elevation model of antarctica derived from cryosat-2 altimetry |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-12-1551-2018 https://www.the-cryosphere.net/12/1551/2018/tc-12-1551-2018.pdf https://doaj.org/article/6b77e331fed14aef8f4482e8d15fd1ab |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelves The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelves The Cryosphere |
op_source |
The Cryosphere, Vol 12, Pp 1551-1562 (2018) |
op_relation |
doi:10.5194/tc-12-1551-2018 1994-0416 1994-0424 https://www.the-cryosphere.net/12/1551/2018/tc-12-1551-2018.pdf https://doaj.org/article/6b77e331fed14aef8f4482e8d15fd1ab |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-12-1551-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
4 |
container_start_page |
1551 |
op_container_end_page |
1562 |
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1766265906864848896 |