Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry
Snow depth on sea ice is an Essential Climate Variable and a major source of uncertainty in satellite altimetry-derived sea ice thickness. During winter of the MOSAiC Expedition, the “KuKa” dual-frequency, fully polarized Ku- and Ka-band radar was deployed in “stare” nadir-looking mode to investigat...
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2023
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/566539 2023-11-12T04:13:08+01:00 Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry Willatt, Rosemary Stroeve, Julienne C. Nandan, Vishnu Newman, Thomas Mallett, Robbie Hendricks, Stefan Ricker, Robert Mead, James Itkin, Polona Tonboe, Rasmus Wagner, David N. Spreen, Gunnar Liston, Glen Schneebeli, Martin Krampe, Daniela Tsamados, Michel Demir, Oguz Wilkinson, Jeremy Jaggi, Matthias Zhou, Lu Huntemann, Marcus Raphael, Ian A. Jutila, Arttu Oggier, Marc orcid:0000-0001-6115-1687 Ilmatieteen laitos Finnish Meteorological Institute 2023-10-27T12:39:25Z application/pdf http://hdl.handle.net/10138/566539 en eng American Geophysical Union. 10.1029/2023gl104461 Geophysical research letters 0094-8276 1944-8007 20 50 88917 http://hdl.handle.net/10138/566539 URN:NBN:fi-fe20231027141766 CC BY 4.0 snow polar expeditions ice depth expeditions snow climate radars snow cover winter lumi naparetket jää syvyys tutkimusmatkat lumi-ilmasto tutkat lumipeite talvi A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä A1 Journal article (refereed), original research 2023 ftunivhelsihelda 2023-11-02T00:01:10Z Snow depth on sea ice is an Essential Climate Variable and a major source of uncertainty in satellite altimetry-derived sea ice thickness. During winter of the MOSAiC Expedition, the “KuKa” dual-frequency, fully polarized Ku- and Ka-band radar was deployed in “stare” nadir-looking mode to investigate the possibility of combining these two frequencies to retrieve snow depth. Three approaches were investigated: dual-frequency, dual-polarization and waveform shape, and compared to independent snow depth measurements. Novel dual-polarization approaches yielded r2 values up to 0.77. Mean snow depths agreed within 1 cm, even for data sub-banded to CryoSat-2 SIRAL and SARAL AltiKa bandwidths. Snow depths from co-polarized dual-frequency approaches were at least a factor of four too small and had a r2 0.15 or lower. r2 for waveform shape techniques reached 0.72 but depths were underestimated. Snow depth retrievals using polarimetric information or waveform shape may therefore be possible from airborne/satellite radar altimeters. Article in Journal/Newspaper Arctic Sea ice HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
snow polar expeditions ice depth expeditions snow climate radars snow cover winter lumi naparetket jää syvyys tutkimusmatkat lumi-ilmasto tutkat lumipeite talvi |
spellingShingle |
snow polar expeditions ice depth expeditions snow climate radars snow cover winter lumi naparetket jää syvyys tutkimusmatkat lumi-ilmasto tutkat lumipeite talvi Willatt, Rosemary Stroeve, Julienne C. Nandan, Vishnu Newman, Thomas Mallett, Robbie Hendricks, Stefan Ricker, Robert Mead, James Itkin, Polona Tonboe, Rasmus Wagner, David N. Spreen, Gunnar Liston, Glen Schneebeli, Martin Krampe, Daniela Tsamados, Michel Demir, Oguz Wilkinson, Jeremy Jaggi, Matthias Zhou, Lu Huntemann, Marcus Raphael, Ian A. Jutila, Arttu Oggier, Marc Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry |
topic_facet |
snow polar expeditions ice depth expeditions snow climate radars snow cover winter lumi naparetket jää syvyys tutkimusmatkat lumi-ilmasto tutkat lumipeite talvi |
description |
Snow depth on sea ice is an Essential Climate Variable and a major source of uncertainty in satellite altimetry-derived sea ice thickness. During winter of the MOSAiC Expedition, the “KuKa” dual-frequency, fully polarized Ku- and Ka-band radar was deployed in “stare” nadir-looking mode to investigate the possibility of combining these two frequencies to retrieve snow depth. Three approaches were investigated: dual-frequency, dual-polarization and waveform shape, and compared to independent snow depth measurements. Novel dual-polarization approaches yielded r2 values up to 0.77. Mean snow depths agreed within 1 cm, even for data sub-banded to CryoSat-2 SIRAL and SARAL AltiKa bandwidths. Snow depths from co-polarized dual-frequency approaches were at least a factor of four too small and had a r2 0.15 or lower. r2 for waveform shape techniques reached 0.72 but depths were underestimated. Snow depth retrievals using polarimetric information or waveform shape may therefore be possible from airborne/satellite radar altimeters. |
author2 |
orcid:0000-0001-6115-1687 Ilmatieteen laitos Finnish Meteorological Institute |
format |
Article in Journal/Newspaper |
author |
Willatt, Rosemary Stroeve, Julienne C. Nandan, Vishnu Newman, Thomas Mallett, Robbie Hendricks, Stefan Ricker, Robert Mead, James Itkin, Polona Tonboe, Rasmus Wagner, David N. Spreen, Gunnar Liston, Glen Schneebeli, Martin Krampe, Daniela Tsamados, Michel Demir, Oguz Wilkinson, Jeremy Jaggi, Matthias Zhou, Lu Huntemann, Marcus Raphael, Ian A. Jutila, Arttu Oggier, Marc |
author_facet |
Willatt, Rosemary Stroeve, Julienne C. Nandan, Vishnu Newman, Thomas Mallett, Robbie Hendricks, Stefan Ricker, Robert Mead, James Itkin, Polona Tonboe, Rasmus Wagner, David N. Spreen, Gunnar Liston, Glen Schneebeli, Martin Krampe, Daniela Tsamados, Michel Demir, Oguz Wilkinson, Jeremy Jaggi, Matthias Zhou, Lu Huntemann, Marcus Raphael, Ian A. Jutila, Arttu Oggier, Marc |
author_sort |
Willatt, Rosemary |
title |
Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry |
title_short |
Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry |
title_full |
Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry |
title_fullStr |
Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry |
title_full_unstemmed |
Retrieval of Snow Depth on Arctic Sea Ice From Surface‐Based, Polarimetric, Dual‐Frequency Radar Altimetry |
title_sort |
retrieval of snow depth on arctic sea ice from surface‐based, polarimetric, dual‐frequency radar altimetry |
publisher |
American Geophysical Union. |
publishDate |
2023 |
url |
http://hdl.handle.net/10138/566539 |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
10.1029/2023gl104461 Geophysical research letters 0094-8276 1944-8007 20 50 88917 http://hdl.handle.net/10138/566539 URN:NBN:fi-fe20231027141766 |
op_rights |
CC BY 4.0 |
_version_ |
1782331294437343232 |