Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions
In an earlier study, melt/freeze rates beneath most of the Filchner–Ronne Ice Shelf, Antarctica, were estimated using an assumption of a steady-state ice shelf applied to a velocity field derived from RADARSAT and ERS-1 interferometric synthetic aperture radar (InSAR) data and an ice-thickness map i...
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ftnerc:oai:nora.nerc.ac.uk:529793 2023-05-15T13:29:37+02:00 Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions Joughin, Ian Vaughan, David G. 2004 http://nora.nerc.ac.uk/id/eprint/529793/ https://www.cambridge.org/core/journals/annals-of-glaciology/article/marine-ice-beneath-the-filchnerronne-ice-shelf-antarctica-a-comparison-of-estimated-thickness-distributions/B87F84484CA9CD3611E1681EB34175BC unknown Joughin, Ian; Vaughan, David G. orcid:0000-0002-9065-0570 . 2004 Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions. Annals of Glaciology, 39. 511-517. https://doi.org/10.3189/172756404781814717 <https://doi.org/10.3189/172756404781814717> Publication - Article PeerReviewed 2004 ftnerc https://doi.org/10.3189/172756404781814717 2023-02-04T19:51:49Z In an earlier study, melt/freeze rates beneath most of the Filchner–Ronne Ice Shelf, Antarctica, were estimated using an assumption of a steady-state ice shelf applied to a velocity field derived from RADARSAT and ERS-1 interferometric synthetic aperture radar (InSAR) data and an ice-thickness map inferred from ERS-1 satellite radar altimeter data. Here, we use these basal accumulation rates and the InSAR velocity data to estimate the distribution and thickness of marine ice beneath the Filchner–Ronne Ice Shelf. These estimates are compared with a marine-ice thickness map derived from radio-echo sounding (RES) data and airborne radar altimetry. In general, we find close agreement between these estimates. In the few locations where there are significant differences, the discrepancies are largely attributable to artifacts in the radar-altimeter thickness map. With improvements such as a much smaller footprint, the next generation of altimeters should overcome many of these limitations, leading to improved marine-ice accumulation estimates. Overall, the good agreement with the RES data validates the InSAR-based estimates over much of the Ronne Ice Shelf. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Natural Environment Research Council: NERC Open Research Archive Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Annals of Glaciology 39 511 517 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
In an earlier study, melt/freeze rates beneath most of the Filchner–Ronne Ice Shelf, Antarctica, were estimated using an assumption of a steady-state ice shelf applied to a velocity field derived from RADARSAT and ERS-1 interferometric synthetic aperture radar (InSAR) data and an ice-thickness map inferred from ERS-1 satellite radar altimeter data. Here, we use these basal accumulation rates and the InSAR velocity data to estimate the distribution and thickness of marine ice beneath the Filchner–Ronne Ice Shelf. These estimates are compared with a marine-ice thickness map derived from radio-echo sounding (RES) data and airborne radar altimetry. In general, we find close agreement between these estimates. In the few locations where there are significant differences, the discrepancies are largely attributable to artifacts in the radar-altimeter thickness map. With improvements such as a much smaller footprint, the next generation of altimeters should overcome many of these limitations, leading to improved marine-ice accumulation estimates. Overall, the good agreement with the RES data validates the InSAR-based estimates over much of the Ronne Ice Shelf. |
format |
Article in Journal/Newspaper |
author |
Joughin, Ian Vaughan, David G. |
spellingShingle |
Joughin, Ian Vaughan, David G. Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions |
author_facet |
Joughin, Ian Vaughan, David G. |
author_sort |
Joughin, Ian |
title |
Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions |
title_short |
Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions |
title_full |
Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions |
title_fullStr |
Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions |
title_full_unstemmed |
Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions |
title_sort |
marine ice beneath the filchner–ronne ice shelf, antarctica: a comparison of estimated thickness distributions |
publishDate |
2004 |
url |
http://nora.nerc.ac.uk/id/eprint/529793/ https://www.cambridge.org/core/journals/annals-of-glaciology/article/marine-ice-beneath-the-filchnerronne-ice-shelf-antarctica-a-comparison-of-estimated-thickness-distributions/B87F84484CA9CD3611E1681EB34175BC |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Ronne Ice Shelf |
geographic_facet |
Ronne Ice Shelf |
genre |
Annals of Glaciology Antarc* Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf |
genre_facet |
Annals of Glaciology Antarc* Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf |
op_relation |
Joughin, Ian; Vaughan, David G. orcid:0000-0002-9065-0570 . 2004 Marine ice beneath the Filchner–Ronne Ice Shelf, Antarctica: a comparison of estimated thickness distributions. Annals of Glaciology, 39. 511-517. https://doi.org/10.3189/172756404781814717 <https://doi.org/10.3189/172756404781814717> |
op_doi |
https://doi.org/10.3189/172756404781814717 |
container_title |
Annals of Glaciology |
container_volume |
39 |
container_start_page |
511 |
op_container_end_page |
517 |
_version_ |
1766001514904551424 |