Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives
Spaceborne radar altimeters record echo waveforms over all Earth surfaces, but their interpretation and quantitative exploitation over the Arctic Ocean is particularly challenging. Radar returns may be from all ocean, all sea ice, or a mixture of the two, so the first task is the determination of wh...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10076253 2023-12-24T10:13:26+01:00 Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives Quartly, GD Rinne, E Passaro, M Andersen, OB Dinardo, S Fleury, S Guillot, A Hendricks, S Kurekin, AA Mueller, FL Ricker, R Skourup, H Tsamados, M 2019-04-01 text https://discovery.ucl.ac.uk/id/eprint/10076253/1/remotesensing-11-00881.pdf https://discovery.ucl.ac.uk/id/eprint/10076253/ eng eng MDPI https://discovery.ucl.ac.uk/id/eprint/10076253/1/remotesensing-11-00881.pdf https://discovery.ucl.ac.uk/id/eprint/10076253/ open Remote Sensing , 11 (7) (2019) altimetry classification retracking Arctic oceanography sea-ice freeboard review; future vision Article 2019 ftucl 2023-11-27T13:07:35Z Spaceborne radar altimeters record echo waveforms over all Earth surfaces, but their interpretation and quantitative exploitation over the Arctic Ocean is particularly challenging. Radar returns may be from all ocean, all sea ice, or a mixture of the two, so the first task is the determination of which surface and then an interpretation of the signal to give range. Subsequently, corrections have to be applied for various surface and atmospheric effects before making a comparison with a reference level. This paper discusses the drivers for improved altimetry in the Arctic and then reviews the various approaches that have been used to achieve the initial classification and subsequent retracking over these diverse surfaces, showing examples from both LRM (low resolution mode) and SAR (synthetic aperture radar) altimeters. The review then discusses the issues concerning corrections, including the choices between using other remote-sensing measurements and using those from models or climatology. The paper finishes with some perspectives on future developments, incorporating secondary frequency, interferometric SAR and opportunities for fusion with measurements from laser altimetry or from the SMOS salinity sensor, and provides a full list of relevant abbreviations. Article in Journal/Newspaper Arctic Arctic Ocean Sea ice University College London: UCL Discovery Arctic Arctic Ocean |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
altimetry classification retracking Arctic oceanography sea-ice freeboard review; future vision |
spellingShingle |
altimetry classification retracking Arctic oceanography sea-ice freeboard review; future vision Quartly, GD Rinne, E Passaro, M Andersen, OB Dinardo, S Fleury, S Guillot, A Hendricks, S Kurekin, AA Mueller, FL Ricker, R Skourup, H Tsamados, M Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives |
topic_facet |
altimetry classification retracking Arctic oceanography sea-ice freeboard review; future vision |
description |
Spaceborne radar altimeters record echo waveforms over all Earth surfaces, but their interpretation and quantitative exploitation over the Arctic Ocean is particularly challenging. Radar returns may be from all ocean, all sea ice, or a mixture of the two, so the first task is the determination of which surface and then an interpretation of the signal to give range. Subsequently, corrections have to be applied for various surface and atmospheric effects before making a comparison with a reference level. This paper discusses the drivers for improved altimetry in the Arctic and then reviews the various approaches that have been used to achieve the initial classification and subsequent retracking over these diverse surfaces, showing examples from both LRM (low resolution mode) and SAR (synthetic aperture radar) altimeters. The review then discusses the issues concerning corrections, including the choices between using other remote-sensing measurements and using those from models or climatology. The paper finishes with some perspectives on future developments, incorporating secondary frequency, interferometric SAR and opportunities for fusion with measurements from laser altimetry or from the SMOS salinity sensor, and provides a full list of relevant abbreviations. |
format |
Article in Journal/Newspaper |
author |
Quartly, GD Rinne, E Passaro, M Andersen, OB Dinardo, S Fleury, S Guillot, A Hendricks, S Kurekin, AA Mueller, FL Ricker, R Skourup, H Tsamados, M |
author_facet |
Quartly, GD Rinne, E Passaro, M Andersen, OB Dinardo, S Fleury, S Guillot, A Hendricks, S Kurekin, AA Mueller, FL Ricker, R Skourup, H Tsamados, M |
author_sort |
Quartly, GD |
title |
Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives |
title_short |
Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives |
title_full |
Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives |
title_fullStr |
Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives |
title_full_unstemmed |
Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives |
title_sort |
retrieving sea level and freeboard in the arctic: a review of current radar altimetry methodologies and future perspectives |
publisher |
MDPI |
publishDate |
2019 |
url |
https://discovery.ucl.ac.uk/id/eprint/10076253/1/remotesensing-11-00881.pdf https://discovery.ucl.ac.uk/id/eprint/10076253/ |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
Remote Sensing , 11 (7) (2019) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10076253/1/remotesensing-11-00881.pdf https://discovery.ucl.ac.uk/id/eprint/10076253/ |
op_rights |
open |
_version_ |
1786182637320142848 |