Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives

Graham D. Quartly*, Eero Rinne, Marcello Passaro, Ole B. Andersen, Salvatore Dinardo, Sara Fleury, Amandine Guillot, Stefan Hendricks, Andrey A. Kurekin, Felix L. Mueller, Robert Ricker, Henriette Skourup, Michel Tsamados

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

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.
Original languageEnglish
Article number881
JournalRemote Sensing
Volume11
Issue number7
Number of pages47
ISSN2072-4292
DOIs
Publication statusPublished - 2019

Keywords

  • Altimetry
  • Classification
  • Retracking
  • Arctic oceanography
  • Sea-ice
  • Freeboard
  • Review
  • Future vision

Cite this

Quartly, Graham D. ; Rinne, Eero ; Passaro, Marcello ; Andersen, Ole B. ; Dinardo, Salvatore ; Fleury, Sara ; Guillot, Amandine ; Hendricks, Stefan ; Kurekin, Andrey A. ; Mueller, Felix L. ; Ricker, Robert ; Skourup, Henriette ; Tsamados, Michel. / Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives. In: Remote Sensing. 2019 ; Vol. 11, No. 7.
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title = "Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives",
abstract = "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.",
keywords = "Altimetry, Classification, Retracking, Arctic oceanography, Sea-ice, Freeboard, Review, Future vision",
author = "Quartly, {Graham D.} and Eero Rinne and Marcello Passaro and Andersen, {Ole B.} and Salvatore Dinardo and Sara Fleury and Amandine Guillot and Stefan Hendricks and Kurekin, {Andrey A.} and Mueller, {Felix L.} and Robert Ricker and Henriette Skourup and Michel Tsamados",
year = "2019",
doi = "10.3390/rs11070881",
language = "English",
volume = "11",
journal = "Remote Sensing",
issn = "2072-4292",
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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, 'Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives', Remote Sensing, vol. 11, no. 7, 881. https://doi.org/10.3390/rs11070881

Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives. / Quartly, Graham D.; Rinne, Eero; Passaro, Marcello; Andersen, Ole B.; Dinardo, Salvatore; Fleury, Sara; Guillot, Amandine; Hendricks, Stefan; Kurekin, Andrey A.; Mueller, Felix L.; Ricker, Robert; Skourup, Henriette; Tsamados, Michel.

In: Remote Sensing, Vol. 11, No. 7, 881, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Retrieving Sea Level and Freeboard in the Arctic: A Review of Current Radar Altimetry Methodologies and Future Perspectives

AU - Quartly, Graham D.

AU - Rinne, Eero

AU - Passaro, Marcello

AU - Andersen, Ole B.

AU - Dinardo, Salvatore

AU - Fleury, Sara

AU - Guillot, Amandine

AU - Hendricks, Stefan

AU - Kurekin, Andrey A.

AU - Mueller, Felix L.

AU - Ricker, Robert

AU - Skourup, Henriette

AU - Tsamados, Michel

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N2 - 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.

AB - 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.

KW - Altimetry

KW - Classification

KW - Retracking

KW - Arctic oceanography

KW - Sea-ice

KW - Freeboard

KW - Review

KW - Future vision

U2 - 10.3390/rs11070881

DO - 10.3390/rs11070881

M3 - Journal article

VL - 11

JO - Remote Sensing

JF - Remote Sensing

SN - 2072-4292

IS - 7

M1 - 881

ER -