Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter
With the continuous development of the China ocean dynamic environment satellite series (Haiyang-2, HY-2), it is urgent to explore the potential application of HY-2B in Arctic sea ice thickness retrievals. In this study, we first derive the Arctic radar freeboard and sea ice thickness during two cyc...
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ftcopernicus:oai:publications.copernicus.org:tc106150 2023-05-15T14:59:08+02:00 Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter Dong, Zhaoqing Shi, Lijian Lin, Mingsen Jia, Yongjun Zeng, Tao Wu, Suhui 2023-03-31 application/pdf https://doi.org/10.5194/tc-17-1389-2023 https://tc.copernicus.org/articles/17/1389/2023/ eng eng doi:10.5194/tc-17-1389-2023 https://tc.copernicus.org/articles/17/1389/2023/ eISSN: 1994-0424 Text 2023 ftcopernicus https://doi.org/10.5194/tc-17-1389-2023 2023-04-03T16:23:10Z With the continuous development of the China ocean dynamic environment satellite series (Haiyang-2, HY-2), it is urgent to explore the potential application of HY-2B in Arctic sea ice thickness retrievals. In this study, we first derive the Arctic radar freeboard and sea ice thickness during two cycles (from October 2019 to April 2020 and from October 2020 to April 2021) using the HY-2B radar altimeter and compare the results with the Alfred Wegener Institute (AWI) CryoSat-2 (CS-2) products. We evaluate our HY-2B sea ice freeboard and thickness products using Operation IceBridge (OIB) airborne data and Ice, Cloud, and land Elevation Satellite 2 (ICESat-2) products. Finally, we estimate the uncertainties in the HY-2B sea ice freeboard and sea ice thickness. Here, we derive the radar freeboard by calculating the difference between the relative elevation of the floe obtained by subtracting the mean sea surface (MSS) height and sea surface height anomaly (SSHA) determined by an average of the 15 lowest points method. The radar freeboard deviation between HY-2B and CS-2 is within 0.02 m, whereas the sea ice thickness deviation between HY-2B and CS-2 is within 0.2 m. The HY-2B radar freeboards are generally thicker than AWI CS-2, except in spring (March and April). A spring segment likely has more floe points than an early winter segment. We also find that the deviations in radar freeboard and sea ice thickness between HY-2B and CS-2 over multiyear ice (MYI) are larger than those over first-year ice (FYI). The correlation between HY-2B (CS-2) sea ice freeboard retrievals and OIB values is 0.77 (0.84), with a root mean square error (RMSE) of 0.13 (0.10) m and a mean absolute error (MAE) of 0.12 (0.081) m. The correlation between HY-2B (CS-2) sea ice thickness retrievals and OIB values is 0.65 (0.80), with an RMSE of 1.86 (1.00) m and an MAE of 1.72 (0.75) m. The HY-2B sea ice freeboard uncertainty values range from 0.021 to 0.027 m, while the uncertainties in the HY-2B sea ice thickness range from 0.61 to 0.74 m. The ... Text Arctic Sea ice Copernicus Publications: E-Journals Arctic The Cryosphere 17 3 1389 1410 |
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Copernicus Publications: E-Journals |
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English |
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With the continuous development of the China ocean dynamic environment satellite series (Haiyang-2, HY-2), it is urgent to explore the potential application of HY-2B in Arctic sea ice thickness retrievals. In this study, we first derive the Arctic radar freeboard and sea ice thickness during two cycles (from October 2019 to April 2020 and from October 2020 to April 2021) using the HY-2B radar altimeter and compare the results with the Alfred Wegener Institute (AWI) CryoSat-2 (CS-2) products. We evaluate our HY-2B sea ice freeboard and thickness products using Operation IceBridge (OIB) airborne data and Ice, Cloud, and land Elevation Satellite 2 (ICESat-2) products. Finally, we estimate the uncertainties in the HY-2B sea ice freeboard and sea ice thickness. Here, we derive the radar freeboard by calculating the difference between the relative elevation of the floe obtained by subtracting the mean sea surface (MSS) height and sea surface height anomaly (SSHA) determined by an average of the 15 lowest points method. The radar freeboard deviation between HY-2B and CS-2 is within 0.02 m, whereas the sea ice thickness deviation between HY-2B and CS-2 is within 0.2 m. The HY-2B radar freeboards are generally thicker than AWI CS-2, except in spring (March and April). A spring segment likely has more floe points than an early winter segment. We also find that the deviations in radar freeboard and sea ice thickness between HY-2B and CS-2 over multiyear ice (MYI) are larger than those over first-year ice (FYI). The correlation between HY-2B (CS-2) sea ice freeboard retrievals and OIB values is 0.77 (0.84), with a root mean square error (RMSE) of 0.13 (0.10) m and a mean absolute error (MAE) of 0.12 (0.081) m. The correlation between HY-2B (CS-2) sea ice thickness retrievals and OIB values is 0.65 (0.80), with an RMSE of 1.86 (1.00) m and an MAE of 1.72 (0.75) m. The HY-2B sea ice freeboard uncertainty values range from 0.021 to 0.027 m, while the uncertainties in the HY-2B sea ice thickness range from 0.61 to 0.74 m. The ... |
format |
Text |
author |
Dong, Zhaoqing Shi, Lijian Lin, Mingsen Jia, Yongjun Zeng, Tao Wu, Suhui |
spellingShingle |
Dong, Zhaoqing Shi, Lijian Lin, Mingsen Jia, Yongjun Zeng, Tao Wu, Suhui Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter |
author_facet |
Dong, Zhaoqing Shi, Lijian Lin, Mingsen Jia, Yongjun Zeng, Tao Wu, Suhui |
author_sort |
Dong, Zhaoqing |
title |
Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter |
title_short |
Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter |
title_full |
Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter |
title_fullStr |
Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter |
title_full_unstemmed |
Feasibility of retrieving Arctic sea ice thickness from the Chinese HY-2B Ku-band radar altimeter |
title_sort |
feasibility of retrieving arctic sea ice thickness from the chinese hy-2b ku-band radar altimeter |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-1389-2023 https://tc.copernicus.org/articles/17/1389/2023/ |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-17-1389-2023 https://tc.copernicus.org/articles/17/1389/2023/ |
op_doi |
https://doi.org/10.5194/tc-17-1389-2023 |
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The Cryosphere |
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17 |
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3 |
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1389 |
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1410 |
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1766331267254583296 |