Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry
Satellite altimetry has been used to track changes in ice sheet elevation using a series of Ku‐band radars in orbit since the late 1970s. Here, we produce an assessment of higher‐frequency Ka‐band satellite radar altimetry for the same purpose, using SARAL/AltiKa measurements recorded over West Anta...
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Online Access: | https://eprints.whiterose.ac.uk/153429/ https://eprints.whiterose.ac.uk/153429/7/Otosaka_et_al-2019-Geophysical_Research_Letters.pdf |
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ftleedsuniv:oai:eprints.whiterose.ac.uk:153429 2023-05-15T13:34:43+02:00 Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry Otosaka, I Shepherd, A McMillan, M 2019-11-28 text https://eprints.whiterose.ac.uk/153429/ https://eprints.whiterose.ac.uk/153429/7/Otosaka_et_al-2019-Geophysical_Research_Letters.pdf en eng American Geophysical Union https://eprints.whiterose.ac.uk/153429/7/Otosaka_et_al-2019-Geophysical_Research_Letters.pdf Otosaka, I orcid.org/0000-0001-9740-3735 , Shepherd, A orcid.org/0000-0002-4914-1299 and McMillan, M orcid.org/0000-0002-5113-0177 (2019) Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry. Geophysical Research Letters, 46 (22). pp. 13135-13143. ISSN 0094-8276 Article NonPeerReviewed 2019 ftleedsuniv 2023-01-30T22:24:15Z Satellite altimetry has been used to track changes in ice sheet elevation using a series of Ku‐band radars in orbit since the late 1970s. Here, we produce an assessment of higher‐frequency Ka‐band satellite radar altimetry for the same purpose, using SARAL/AltiKa measurements recorded over West Antarctica. AltiKa elevations are 3.8 ± 0.5 and 2.5 ± 0.1 m higher than those determined from airborne laser altimetry and CryoSat‐2, respectively, likely due to the instruments' coarser footprint in the sloping coastal margins. However, AltiKa rates of elevation change computed between 2013 and 2019 are within 0.6 ± 2.4 and 0.1 ± 0.1 cm/year of airborne laser and CryoSat‐2, respectively, indicating that trends in radar penetration are negligible. The fast‐flowing trunks of the Pine Island and Thwaites Glaciers thinned by 117 ± 10 and 100 ± 20 cm/year, respectively, amounting to a 9% reduction and a 43% increase relative to the 2000s. Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Pine Island West Antarctica White Rose Research Online (Universities of Leeds, Sheffield & York) West Antarctica |
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Open Polar |
collection |
White Rose Research Online (Universities of Leeds, Sheffield & York) |
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ftleedsuniv |
language |
English |
description |
Satellite altimetry has been used to track changes in ice sheet elevation using a series of Ku‐band radars in orbit since the late 1970s. Here, we produce an assessment of higher‐frequency Ka‐band satellite radar altimetry for the same purpose, using SARAL/AltiKa measurements recorded over West Antarctica. AltiKa elevations are 3.8 ± 0.5 and 2.5 ± 0.1 m higher than those determined from airborne laser altimetry and CryoSat‐2, respectively, likely due to the instruments' coarser footprint in the sloping coastal margins. However, AltiKa rates of elevation change computed between 2013 and 2019 are within 0.6 ± 2.4 and 0.1 ± 0.1 cm/year of airborne laser and CryoSat‐2, respectively, indicating that trends in radar penetration are negligible. The fast‐flowing trunks of the Pine Island and Thwaites Glaciers thinned by 117 ± 10 and 100 ± 20 cm/year, respectively, amounting to a 9% reduction and a 43% increase relative to the 2000s. |
format |
Article in Journal/Newspaper |
author |
Otosaka, I Shepherd, A McMillan, M |
spellingShingle |
Otosaka, I Shepherd, A McMillan, M Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry |
author_facet |
Otosaka, I Shepherd, A McMillan, M |
author_sort |
Otosaka, I |
title |
Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry |
title_short |
Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry |
title_full |
Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry |
title_fullStr |
Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry |
title_full_unstemmed |
Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry |
title_sort |
ice sheet elevation change in west antarctica from ka‐band satellite radar altimetry |
publisher |
American Geophysical Union |
publishDate |
2019 |
url |
https://eprints.whiterose.ac.uk/153429/ https://eprints.whiterose.ac.uk/153429/7/Otosaka_et_al-2019-Geophysical_Research_Letters.pdf |
geographic |
West Antarctica |
geographic_facet |
West Antarctica |
genre |
Antarc* Antarctica Ice Sheet Pine Island West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Pine Island West Antarctica |
op_relation |
https://eprints.whiterose.ac.uk/153429/7/Otosaka_et_al-2019-Geophysical_Research_Letters.pdf Otosaka, I orcid.org/0000-0001-9740-3735 , Shepherd, A orcid.org/0000-0002-4914-1299 and McMillan, M orcid.org/0000-0002-5113-0177 (2019) Ice Sheet Elevation Change in West Antarctica From Ka‐Band Satellite Radar Altimetry. Geophysical Research Letters, 46 (22). pp. 13135-13143. ISSN 0094-8276 |
_version_ |
1766056484289904640 |